Paralleling 3 inverters together, Growatt 5000w Solar System

Wiring 3 inverters together in parallel to make a 15kw system! These inverters are the Growatt 5000ES model. It has a 5kw inverter putting out 240v AC from a 48v DC battery. This inverter has a built in MPPT solar charge controller that can accept up to 6kw of solar PV per inverter. That means I can have up to 18kw of solar panels connected.
I'm wiring these inverters with a solar-edge auto transformer. This allows me to split the 240v into two 120v legs. This provides the 120/240 volt split-phase power we use in North America.
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Disclaimer:
My videos are in no way intended to be instructional "how-to" lessons. I am simply documenting my project for informational purposes. Property damage, personal injury, or death may result, even when following manufacturer's instructions. I cannot be held liable for such damage or injury. It is YOUR OBLIGATION to ensure that you are complying with any local and federal laws as well as code and permit requirements.
David Poz, LLC

[@lunatik9696]

David seems to be a genuinely nice guy. I enjoy watching your video's. Lots of good practical info.

[@davestech6357]

You have come a long way. They make phase sensors that monitor your power and it can really save your day by tripping a disconnect. I would add one especially if you were to lose your neutral. Awesome setup you got.

[@kennethalmond8922]

Congratulations! Its always so much fun to put things online and see them all work :)

[@kennethnwarache8562]

I have a couple of stringed inverters (up to 9units in parallel). Still I always enjoy watching you at the back ground.

[@jwsolarusa]

You have put in a lot of work into this video. Thanks for all the awesome videos and advices. Cheers

[@markmyers454ss]

Signature solar recommended watching your videos before we ordered these inverters. Thank you for the video series on these so far. We ordered 2 and the transformer yesterday. Just ordered the watt meters off Amazon as well. Thank you

[@DavidPozEnergy]

Your welcome, and good luck with your build

[@travisdjermyn]

We build 100 homes a year and, I use these batteries on all of the holes that come with solar and battery in the build.. we use single or duel Sol-Ark typically, however we just started trying grow watt. Great videos for sure. 👍

[@popoyislife129]

Finally a video for old regular joe like me. thank you kid this video answer my question. You got a new subcriber👍

[@robbonner]

Epic amount of detail. Good stuff

[@carrieperez1618]

Really great videos, I really enjoy watching and learning! I only wish my property got enough sunlight to do this myself. I research it every couple of years, and I always give up on it because my property's too small, and just does not get enough sun :(

[@CDNguyen59]

David, very interesting to see you installed Growatt inverter, I gave been used MppSolar for about 5 yrs, currently I have 2 hybrid inverter parallel together that give me 10kw to use for my electric cloth drier and the water heater, I hoped these Growth work ok for you, watching your video man, they look exactly installation for PIP inverters

[@TheOneJacinto]

Awesome!!! Thanks for sharing, David! Enjoy that!

[@williammeek4078]

Great video, but now i feel old for being able to instantly recognize a serial cable.

[@charlesrichards5389]

I had one on my first mouse, back when mice had balls.

[@feelingtardy]

you'd be surprised how much "modern" equipment still uses rs232 for downloading to/uploading from

[@davidchristensen1219]

True, but mfgs have switched to using RJ11 or RJ45 connections for serial communications. On top of that, most equipment these days are using RS485 for CAN and Modus communications.

[@igotedumacated]

LOL you are not alone in that comment.

[@carrieperez1618]

@@feelingtardy I thought the same thing! I immediately said, "that's just an RS232"!

[@SyberPrepper]

Thanks for all the detail. Much appreciated.

[@dalehorne9316]

David awesome job and this is something I would like to in the very near future your video has to be the best and easy to understand and comprehend thanks

[@EwePeople]

I was on the phone with Signature Solar for about an hour and a half today. That are the most helpful solar company I've talked to. I'll be getting two 5kw inverter chargers and the auto transformer. I like how if one fails I can still get some electricity out of the other, I can use more panels, add more inverters down the road if necessary, and shipping is going to be a lot more reasonable than the big 12kw unit. I will use your discount code as well, just waiting for the invoice.

[@DavidPozEnergy]

Very cool. That will be 10kw of inverter power, and up to 12kw of solar PV. Nice.

[@dudleykruythoffdiy]

David it has been a pleasure watching you, it has helped me in making my the choice to use the 5000 220 volts, with a mid point transformer purchased them from signature solar and was over happy that i did not realize I didn't use the coupon code. I will be powering my entire home with this and hope to add another inverter later this year. looking forward to your updates on this installation. I think this will be the first solar installation using Growatt on the Island of St. Maarten the Dutch Caribbean.

[@BenMitro]

All the best with that project Dudley.

[@jefferyhickey7342]

Whats the cost I'm curious

[@eddietee6305]

The main drawback with auto-transformers and transformers are the efficiency. You gonna have losses. 80% efficiency is typical and decreases with increasing loads.

[@chriswaller4229]

If you haven't used the app, it has some really cool features. I'm running 2 of the new style 3kw 48v growatts rated for 250v pv and 120v output.

[@ahnafpiash]

I don't know since when but my subconscious mind has been waiting for this video since the last video update!!

[@loucinci3922]

Nice job. Fantastic overview. Well done. Thanks for sharing.

[@CaptKirk1701]

Use 4 bushings under the cover of your auto transformer to allow air to flow behind cover.

[@sixoffive]

Stand offs

[@JasonWorksAlot]

🙋🏼‍♂️🙋🏼‍♂️🇺🇸

[@edstiver]

Great content David! Would love to see a follow-up on overall efficiency of the system.

[@ChinaChuck]

kzbin.info/www/bejne/haDKk3uke8ZqfZY

[@carpballet]

That is a nice thing you’re doing with your grandfathers tools. And thanks for mentioning it.

[@josephkhouri7028]

i REALLY LOVE YOUR SYSTEM AND BATTERY BACKUP, HOPE SOME DAY i CAN DO THE SAME. THANKS BIG JOE

[@digigamer7]

Looking forward for the next video. I'm planning in making an budget solar system for my parents here in Puerto Rico because we are right next to the hurricane season and we don't want a Maria or Irma part 2.

[@kingarthurthe5th]

Same here bro.

[@technoe02]

Your videos and others like you are how renewables become common household items. You're doing some of the hard work to make it easier for the rest of us. I really appreciate that.

[@HauNguyen-kj3mn]

⁷6⁸⁵55⁵5⁵⅚ 80

[@HauNguyen-kj3mn]

9 90 000⁰ ha t hữu ⁿ⁸ ngoài ⁶⁶⁶⁶⁶⁶⁶⁶⁶6 69 ⁶⁶5⁷⁶6⁶88ù6

[@walkingthruyourdata-6019]

Very great!. I'm learning about Solar to build my own system. Yes, expensive, but I'm tired of depending on the grid. Great Vid.

[@nathaliamendes4794]

Hi Sir, I don't believe you are just a DIYer I believe you are a cook! 👍👍👍👍👍

[@scoleri]

I'd love to see the grid wired in as well. So we could see what happens at night or when the grid power gets cut. Also the same thing without a battery at all.

[@mikewhitlock1849]

Sounds like he has manual transfer switch or maybe ATS on his main grid service. He just manually overrides the ATS so he can test.

[@easylooker]

Its good to finally see someone on the internet have a video on hooking up multiple units of a Euro style inverter. I on the other hand have 4 and use a transformer instead. All 4 go to a subpanel and from subpanel have 2 wires a neutral and hot going to the transformer, in goes 240 and out comes 2 legs of 120V. It can handle about 7x more current load than that autotransformer for just a little more money . From the transformer it goes to another subpanel that then distrubutes out to house, shops etc.

[@DavidPozEnergy]

Sounds like a good setup.

[@billjohnson3344]

It's generally not a good idea to do this in the US as the possibility of a 'floating neutral' is very dangerous. Given a fault or circuit breaker open which results in a disconnection of the autotransformer, either 120V leg could see up to 240V (double voltage) depending on the present imbalance of the phases. Say goodbye to any 120V rated electronics. Same scenario if David forgets to turn on the autotransformer breaker first - before the house/inverters. A few ways to do this correctly and safely. Autotransfer switches for home backup are wired in such a way such that the integral autotransformers can't be disconnected from the house when off-grid/grid down backup mode. Alternately, off-grid inverters have them integrated - same inability to ever disconnect. Some inverters like SMA make you use two 120V inverters instead, so you'll only loose one 120V phase given a fault (which is safe). Growatt also makes split-phase inverters with an integrated autotransformer, which are probably better for this US application (though still not UL listed).

[@danp762]

@@billjohnson3344 So, all he has to do is connect the autotransformer to L1, L2 and the neutral bar without a breaker? Maybe run all the wires from the autotransformer and breaker panel in steel conduit? just in case there is a fault? Where would you hook up earth ground?

[@BenMitro]

@@billjohnson3344 Very interesting Bill, in Australia we don't have this problem (I don't think), since we either have single phase 230V or 3 phase (380V). Can you point me to an article that describes this? Cheers.

[@billjohnson3344]

@@danp762 The SolarEdge autotransformer that David is using is designed to be wired directly to a SolarEdge StorEdge 'Connection unit' - no breaker in between. That configuration has been specifically designed, and safety verified by the certifying body (UL in the case of US usage). He is not using the transformer as it was intended. Connecting to the bus bars without circuit protection is also not a good idea. It solves the issue of the floating neutral, but an overcurrent fault in the autotransformer is now unprotected. To do what he is doing safely, the autotransformer breaker should be physically linked to all the other inverter breakers. This way a fault on the autotransformer will disable the supply voltage also. Possibly this could be linked only to the master inverter breaker, if the slaves shut down instantly when the master looses power. He'd have to test this. If linking all the breakers, he'd need to make sure they are rated to be able to trip the physical load of the multiple connected breakers. Regarding grounding, I'm not sure where he is linking neutral and ground - as well as if he has ground rods for the garage and house separately. The correct way to do this is to bond the ground and neutral at the 'main panel'. In his case here (providing power from the garage to house), his garage is his 'main panel' and his house is a 'sub panel'. So ideally the garage would have the bond, and the house would have ground and neutral separate. I suspect that is not how he has it set-up, probably left the bond to occur in his house panel so as not to disturb all that 'normal' wiring when connected to the grid.

[@alanmainwaring1830]

Hi David, I have built my own system using the MPP Solar off grid inverters. . I have had two 240V 4000 W inverters in parallel running for 6 years, the only problem I have had is getting cooling fans for them. These Growatt inverters look very similar to the MPP Solar inverters, the user manuals are very similar. Recently I did an install recently with the Growatt inverters. I have heard some bad reports on the Growatt Off Grid Inverters . Personally I absolutely love them. I am envious of the design engineers that made these, they are reasonably priced and seem reliable of course time will tell. At my home in Australia in ten years I have had two Fronius Grid tie 1.5Kw inverters go faulty. Which is very disappointing. Luckily in Australia we don't need the auto transformer system. Anyway thank you for your clear and easy to follow videos. I really hope these Growatt inverters are reliable and that one can get parts for them to fix them, I hate the idea that they go to landfill.

[@backhoefred]

I like your videos, I have had solar on our ranch since 1999. Started with dual Schneider sw 5548s . Now i am totally off grid at the home with dual smas like i see on your wall in the video. I increased my capacity by ac coupling my smas with my old grid tied system. Simple, connected to the ac buss to the house. The smas frequency control my enphase array for load and battery charging. Many times, during the day i have 40 amps grid without taxing the smas, as they provide grid only and battery charging for nightime. Im an old time diyer in California. Fred

[@backhoefred]

Oh PS my main thing is heavy equipment and gold mining.

[@desertaip9137]

Really enjoy your videos. For this install, I'd recommend running the 240VAC lines in conduit, or using SOOW cable for safety. Or install a shield over the wiring bundle.

[@michaelspencer6523]

True

[@lanfordmims5080]

David,, Thank you, Thank you, Thank you for showing how you connected everything to the main panel !!! Most you tubers show these all in one inverters how to mount them to the wall, then presto change-o it’s running the whole house, but never show how you connect to the main panel to get the inverter to run the whole house ! Cudos to you for showing the whole system connectablity! This has made my day! Of course anyone should know the final step is letting a certified electrician do the final hookup for safety. Otherwise famous last words, oh I can do this myself, then wake up in the middle of the night with the house fire alarm going off!!

[@DavidPozEnergy]

Your welcome. Thanks for watching.

[@paulwoolford2861]

David, keep going brother, your videos are very informative

[@boblevey]

Thank you!!! Always great to hear your thoughts on products=all solar

[@ai4px]

Great video. Fwiw you can stack 120v growatts asymmetrically. Really love how you let us in on what you are thinking and doing as you go.

[@karikreps3513]

Have only once wired ceiling light. Am/was telecommunications, so understand most of what your saying. I have man who says he journeyman electrican so I am considering solar & What I need. I have read about a new type glass that is capable of replacing solar panels. Then there is another guy who says they can use a spray on regular windows that can also collect the rays & supply solar. ] I don't want to buy what will be outdated soon. Have u heard about that?

[@maxmilliah]

Great work, the stuff of legends. If you add a pdf of the wiring schematics that would be great for your fans.

[@vkwong7569]

Robertson drives are the best, IMHO. As a guy from Sabah, Malaysia, prior to my studies in Canada (1987-1991), I have not seen any other type of screwdriver heads other than the "straight slot" & Philips, both prone to chipping/slipping. After I saw the Robertson drive (and used it), I absolutely love it. Extremely robust and will never slip! I brought the screwdriver back to Sabah, and still have it today. However, there are no screws using the Robertson drive here.....

[@robertchambers5821]

Hello David: Great video, and looking forward to your update after a month.

[@theradioweyr]

Looking forward to the autotrans floating neutral nightmare issue being addressed - I have seen how seriously a power company takes this because as they are responsible for failures on their end and how fires can occasionally be started. I recently bought the Victron 100A (still just 30A neutral capability really, not different from what you are using, just that it is a toroid and a wee bit more efficient and quiet) autotrans, mainly for potential hurricane use here in Florida and as a matching tool as I build out my PV/hybrid system to match alternate power/generator inputs to the inverters that have charge capabilities.

[@paulpierce2051]

I think your system is on par with how I wanna go. I’m installing a separate breaker box with separate “emergency” outlets in my house. From there I want to be able to run a generator or solar for the things I want on. So if the power goes out I just unplug my well and plug into my emergency power source.

[@charlesrichards5389]

I'm looking for a large toroid core to wind my own, but even the ones from China are too expensive.

[@CotyCondry]

I am building a similar setup to David's, with the Growatts and solaredge autotransformer, but using 1 breaker panel for 240v loads and a 2nd breaker panel just for 120v loads. The 2nd breaker panel gets its neutral from the autotransformer, and bonded L1 and L2 with it, and their shared power comes from the 240v panel via a single 30A double-pole breaker. This way, if the autotransformer breaker is tripped, all 120v power is disconnected and I won't have a floating neutral.

[@jdjd1754]

The "old" pc connectors are DB9 and you can build your own custom RS-232 cables!

[@BenMitro]

Are you sure? They looked like DB15's to me. I could be wrong.

[@jdjd1754]

@@BenMitro 18:31 9 pins :)

[@chrisdeleo4574]

Also looks like it is RS-485 @ 19:28

[@daemoncan2364]

...and they're M-F cables to daisy-chain between units.

[@captainobvious9188]

I'm glad I'm not the only one that breadboards stuff out on the wall before putting it in conduit.

[@rklauco]

You won't believe it - there is like 15 reviews of the Growatts all over the place. NONE of them shows you can multiply the charging by having more units, not only the AC output. This video answered my biggest question on the inverters. Thanks!

[@DavidPozEnergy]

Glad it helped.

[@constructioneerful]

So cool. I'm thinking the efficiency calculation ends up considering the slight inefficiency of the new growatts compared to how many additional solar panels you can buy with the savings?

[@feelingtardy]

if you want to clean up that wiring, you could get a "gutter/troth" about 5 foot long or so, they come in many sizes. but be prepared to drill a bunch of holes of varying sizes and proper bushings. then you can run your mess inside the gutter and have holes directly under/above your connections. you'd be left with straight runs from the gutter to the connections so all the wires would be in neat lines. a lot of work though

[@mwolrich]

Yes, “Engineer775” uses those gutters all the time, wiring up the 12K Solark inverters, installations always come out looking great, and meets all code requirements as well, which is important, if you have Homeowners insurance and your house burns down due to an electrical fire 😳

[@Theoppositeofchaos]

I been waiting for this one David good job

[@cetyl2626]

I too enjoy using my fathers and gradfathers tools. I look forward to passing them on to my son.

[@oleksii.zagorskyi]

18:40 it's a DB9 connector, in most cases used for serial port communication.

[@DavidPozEnergy]

Thank you.

[@igotedumacated]

It is really great to see guys like you do this stuff. I plan on making my parents property fully self contained in the future and seeing how you and others power their houses will help me make my parents property self contained. Do you possibly have a well to see how this system reacts to well pumps turning on?

[@DavidPozEnergy]

Thanks for your comment. Unfortunately, I'm on town water at this property. Hopefully I'll build another house in a couple years and have a well. I have tested this with air conditioners, air compressor, table saw, etc. and they all start perfect. I know someone with a well and running just one of these inverters and he reports no issues.

[@henrymendoza1150]

Es un gusto, saludando desde Guatemala... mi Ingles es muy basico y trato de entender tus videos, que son muy explicativos. agradecido por tanta informacion, acabo de tener mi primer trabajo en los INversores Growat. tengo unos años trabajando en la energia alternaitva, gracias de nuevo

[@farside87]

Dave, another great video. Thanks for all the information. Let us know when you get those fuses and where you install them.

[@FilAmGabe]

Hey David great video. Can you please send a link to the disconnects that you use?

[@MindCrime550]

He linked to the one he uses on the PV side in the previous video, check the description: kzbin.info/www/bejne/rXW3nICHjpiFrpI

[@ChadCourtneyTAZ427]

The cable is a DB9 (serial cable) but based on the labeling instead of using RS232 (typical serial communication) it uses RS485 (SCSI communication - pronounced scuzzy)

[@phillipsusi1791]

@MikkelRS Indeed.. nothing to do with SCSI ( that's for disk drives ). Though the difference between RS232 and RS485 isn't voltage but rather that it is meant to daisy chain devices with a few bits to address them rather than being point to point.

[@t.d.5804]

Got 4 MPPSolar Pip4048 each 4kW in 3phase setup (Europe 400V 3p and 230V 1p) for 7 years now. Running fine, House, HeatPump/AC, electric cars. Bought them because SMA were too expensive in 2014 and they did not offer the features I needed. greetings from Europe

[@zannemairiwoods528]

Love to watch a master at work ! Being a totally new person to all of this technology, I am overwhelmed by your knowledge !!! What makes this totally safe? Also safety measures one must take ?

[@LithiumSolar]

Very cool setup. I look forward to the efficiency testing! I'd love to hear what the idle/self-consumption is of running those 3 inverters.

[@DavidPozEnergy]

Hi LithiumSolar, Idle consumption is high. 70w per inverter, plus 18w for the auto-transformer. 5.5kwh per 24 hours. I am with you, in that I wish it was lower. My SMA inverters are lower, but also cost a lot more.

[@randybobandy9828]

@@DavidPozEnergy that is crazy! 5.5kwh just to idle for a day! How much power are you generating a day during winter?

[@DavidPozEnergy]

Hi Randy, I have not gone through a winter with all 3 solar arrays producing, so I can't say for sure.

[@charlesrichards5389]

@@DavidPozEnergy Don't Growatt inverters have a low-power mode?

[@Chuck.Henderson]

@@DavidPozEnergy Over 5kw per day seems like a lot of inefficiency. I am experimenting with using a small off grid pure sinewave inverter, and then putting many grid tie microinverters in parallel with the AC output of the off grid inverter. The grid tie inverters seem much more efficient than any off grid inverters I have tried and they seem to sync up just fine to the off grid inverter. This entire system being off grid, the grid tie inverters just think they are on grid. I seem to get a lot better efficiency doing it this way, rather than using a larger off grid inverter. I do not know how well my method would scale. I only have 1.5kw of solar to experiment with, but have fun trying different configurations to try to improve efficiency. I wonder if you or anyone else here has tried something like this?

[@maverickmacgyver]

“I just checked the meter, and we’re pulling 1.21GW, prepare to jump to light speed!” -DPZ

[@DavidPozEnergy]

LOL

[@ziggystardog]

Next, he'll find a way to get his house up to 88 mph. Somehow I think hoverboards will be involved.

[@justinneill3888]

Bless your heart for not using drywall screws to mount things to your backboard.

[@DavidPozEnergy]

Not enough sheer in a drywall screw.

[@HolyBibleOpen]

Awesome David. Love your videos.

[@cattigereyes1]

Total cost of the system Also as someone who’s worked with a electrician. I can see electrician knowledge from these videos.

[@leexgx]

I would strongly recommend using full PPE when flipping switches for the first time and especially the DC switches for solar and lithium battery Banks it can be especially dangerous as things can get dangerously exciting very quickly (at a minimum have long arm flash resistant gloves, and protective glasses but ideally full face covering type mast, might not be messing with 10kv+ here but risk is still there)

[@cornwallav8r]

PPE would make sense in facilities with larger fault current. I highly doubt this guy's system is capable of more than 4KAIC, which isn't necessarily enough to justify that level of protection.

[@bobsaturday4273]

full ppe ? sure . go back to your knitting

[@RandyRandersonthefamous]

That's an amazing system. I would separate the sync cable from the high voltage stuff.

[@michaelcoghlan9124]

Yes thanks David very interesting.good luck to you an your family. Best regards M

[@IntenseGrid]

I love your videos, BTW. You do the testing and building and make the mistakes so we don't have to. Please don't ever cover up your mistakes.

[@DavidPozEnergy]

Thanks for watching. I appreciate the positive feedback for showing my mistakes. Sometimes showing them spawns so much criticism that it makes me want to stop. Then your comment keeps me centered.

[@DIYDaveT]

@@DavidPozEnergy You can tell the people who are just spectators vs. those who are using your data as actionable intel. Spectators will complain, doers will thank you for sharing. Spectators actually want you to fail because it makes a better show for them AND they don't feel like they are missing out and falling behind. I'm impressed by the value prop of these GroWatt units because, yes, the Sunny island units are expensive. Even worse, Sunny Island seems designed to force you into buying Sunny Boy inverters in order to turn your solar power into something that can be used either for direct consumption or to charge the batteries. This suggests that they care more about their profits than they do about the value prop for their customers. Now, if the Growatt product turns out to be cheap Chinese junk then SMA is worth every penny because, especially in the USA, the big cost of these systems is the labor to install, not the gear. So if you can install it once and have it not break down then that is worth A LOT. But if GroWatt combines the functionality of a MidNite Solar Classic 250 charge controller with a SMA Sunny Island Battery inverter and it does so for way cheaper and it is actually reliable then GroWatt is going to dominate in a short period of time because this is the functionality that people actually want. One more thing: those who live in the city and have access to city power will be seeing their power bills skyrocket into the future. So it is becoming cost effective to install an offgrid system which feeds one side of an ATS where the city power feeds the other side and solar is made primary. When your solar system runs out of juice, the system flips over to city power as a backup. But if you size your system right, 80-90% of the time or more will be running in off grid mode.

[@offgridwanabe]

Good stuff I am sure you matched the voltage strings from each array so they would be the same it will be interesting to see if the higher voltage array produce more. I am still confused on the transformer feeding the 120 volts to the same box as the 240 from the inverter. I would have wired a separate breaker panel for 120 but I am not an electrician.

[@firpofutbol]

I am also confused. From other auto transformers I've looked at, there have an input from the AC source, and an output. Here I only see an output of two hots and a neutral and no input. On top of that, like you said, it feeds back into the same panel as the 240 inverter.

[@johnbcampise]

The 30 amp breaker in sub panel feeds into the transformer. Then the transformer sends 120 volts to the neutral bar. When a 120volt breaker is inserted into sub panel, it only touches one of the 240 volt panel bars and sends one wire from breaker to the 120volt appliance load (light switch, plug, etc.). The neutral return line from the appliance attaches to the neutral bar (which is attached to 120volt transformer output line). Seems weird, but that’s how it turns 240v into 120volt. So apparently since the load is not going from one 240v bar to the other 240v bar, but instead from on 240v bar to the 120volt neutral bar, that equals 120volts?

[@gingerehrhardt843]

I enjoy your videos so much.

[@cowboymcq6711]

Great job David 👍🏼 You did a video from Mountain Maine I actually have an off grid camp in the next town over. Living the good life ❗️❕🌞 Living off grid can be frustrating at times but is super rewarding at the end of the day as long as your batteries don’t die hahahahaaa

[@DavidPozEnergy]

Hi Cowboy MCQ6, I'd love to check out your projects in Maine if you are willing to show them off. I'm on Facebook at Davidpozenergy

[@nicholashowell]

I had wondered if having 3 inverters/charge controllers connected to the same battery would cause any issues. It looks from your video like this is what you have done with no apparent issues so I guess it's OK.

[@DavidPozEnergy]

Yes, one battery bank. The manual actually says to have only one battery bank.

[@paulpierce2051]

When doing this in an off grid situation, do you bond the neutral to ground at the breaker box?

[@crhu319]

It has to be bonded in only ONE place per system. Else you get multiple paths through all your neutral and ground wires in a fault situation. The inverter documentation should clearly tell you - and show on a wiring diagram - if the incoming DC node that it treats as ground (ie doesn't turn off when off) is isolated from the most positive wire on the outgoing 3 phase 240/120. If it is isolated, you would need to bond the wires at the service panel to deal with load faults, and separately at the feed panel (near the inverters). If it is not isolated, it could be bonded in either place but not both. For compatibility with grid power you may prefer to bond it at the service panel. Bonding it in both panels is not particularly dangerous as they are connected only to each other leaving no alternate paths other than on the wire between. But code will tell you to do it one way or another.

[@paulpierce2051]

@@mikehodgetts4864 yes helps a ton. I understood everything you posted but found the new nugget of information at the end, thank you.

[@TheJmac82]

@@mikehodgetts4864 Just so I get this correctly, Main breaker box in a hybrid situation like this would be grid box correct?

[@linossinkala7840]

I love your work mr david

[@volvo09]

Might have to pick one of these up... Keep seeing them but just moved to a new place of my own with a well pump, so i have to see how much it pulls on startup. I don't believe the well is terribly deep, but it"s still a submersible pump..

[@rawsonreyes9774]

I would like a basic hand drawn lay of the wiring diagram of this set if possible

[@Starkchris]

Send me your info if you need a drawing

[@hcclife425]

@@Starkchris I could use that drawing if you don't mind

[@REELAXJoor]

@chris stark I would also appreciate the drawing please 🥺

[@k4831]

@@Starkchris I would also love to have the drawing when it is convenient.

[@johnsamons1961]

@@Starkchris Could you kindly send me that drawing as well please.

[@deltoncbaker]

I would mount the auto transformer to a concrete board like the board you mounted the Gowatts.

[@G_K_S_R]

Thank you for the informative video.

[@RobAbdul]

You are living my dream. I cannot express the sheer excitement I get from seeing this kind of stuff. Going off grid is the ultimate; more so due to the astronomical energy prices due to Covid-19, global demand and the war in the Ukraine. You are very fortunate your wife is interested in this too. I was touched by words regarding your grandparent's screw driver (we call is Philips head in this side of the pond, UK) I discovered your channel on KZbin today. I hit the like, subscribe and the bell icon. Thank you for sharing. You've saved me thousands of pounds - I've learnt from your experience. Rob :-)

[@DavidPozEnergy]

Thank you for the kind comment. Good luck with your future projects.

How are you dealing with the neutral to ground connection?

[@RolandW_DIYEnergyandMore]

@David, if you didn't bond yet, can you please measure the voltages from Ground to L1,N, L2. Would be interesting how that looks like with the auto-transformer...In principal, you will need to bond at that shown load panel as this is the point of entry from all generators.

[@crhu319]

@@RolandW_DIYEnergyandMore Yes in principle. But do the inverters bond the DC input ground to the AC ?

[@alanmainwaring1830]

@@crhu319 No they do not , leave the DC wiring floating bond the Neutral at the switch board only in Australia RCD devices are compulsory at the switchboard. Of course USA is different.

[@scarfaceveteren]

I would love to see a review on the new MPP SOLAR LVX 6048 split phase inverter. We live in southern Mexico and are building an off grid house and I’m not certain yet which inverter I want to get. Then there is also a waterproof mpp solar split phase inverter coming out shortly. Keep up the good work Dave. I really enjoy your videos.

[@philippserrin8268]

This is an excellent video. Thanks.

[@dalehorne9316]

David the grey wire for paralleling the panels is a serial connector yes from the older times but still is functional

[@dig1035]

Very cool skrewdriver!

[@johnjr3870]

Looking good so far. I am setting up property way out and solar is way cheaper than running grid, following!

[@fisherman7633]

First time on your channel. Interested in Solar Power for future home use, but don't know anything about it. What i like about your video: 1. You share knowledge to us. 2. You explain in detail. 3. Close-up video shots 4. You are transparent. 5. You read the comments.. QUESTION: How do you know so much about Solar Power? Did you study on your own? Looking forward to watching more of your videos specially the update to this video in hopefully about a month. Thanks for sharing. And thanks also to the one who recorded the video. I Liked & Subscribed. Stay safe. God bless.

[@DavidPozEnergy]

Thanks for subscribing. I'm learning as I go. Sometimes the commenters share some cool experience. I love reading manuals, seriously manuals are tons of fun. I've been lucky enough to make some friends with electricians who are extremely helpful.

[@edwehnes]

Thanks! Very helpful

[@superdidxp]

bravo belle installation

[@engdarfatgalalyelectrical1076]

Your information is beautiful and helpful I hope to be health and safety

[@lennieadi]

Great video David. I really want this diy set when I have my retirement home built in Jamaica in 10 years time, but I'm not an electrician and don't have any technical background. I guess I'd need to find a willing and competent electrician to watch the videos and install this for me. Keep the good work up dear man. 👍🏾

[@ChapuzasconRober]

Still watching but looks impressive!!!

[@danielp6629]

Great video 👍. Kinda bummed I went power wall vs just buckling down and doing what you have.

[@mauratubo7316]

wow really powerful fo your inverter

[@andrebelanger7798]

Thank you for this vidéo have nice safe week

[@brentjohnson6654]

Another great video

[@jamiejoker118]

Brilliant stuff

[@kikofras]

1.21 GIGAWAAAATTSSS. GREAT SCOTT!!!

[@cfdProptrader]

Great Contends, cheers

[@chisomrobinson9570]

Wow nice job

[@PlatinumDiscos]

Hi David, thank you for the video. One thing that I would like to mention is that on the inverters I use always tells you not to switch on your solar array while the inverter is physically on it tells you to do it before you switch it on again, and it must be because of a surge. It might be different with your Growatt inverters. I would check your manual to be sure.

[@PlatinumDiscos]

One other thing that I found with my hybrid inverters is that there is a neutral earth bonding screw inside the inverter which you have to take off if you are tied to the grid because in the UK, the neutral earth bond is also done in the input.

[@Desertphile]

Thank you. I used the Demuda 6,000 watt 24/48 VDC - 110/220 VAC input, 110/220VAC pure sine wave output 100 amp MPPT charger-inverters and I think they might have cost more than the Growatt. It has a PV input max of 5,760 Watts which is vastly larger than my two 100 watt panels. :-) Going by functionality and price, it appears to Growatt is the better deal.

[@PaulNelsonphotography]

Great video! Please protect the #8 thhn wire😊

[@chasmarischen4459]

Good for you. Good luck. Thanks.