EG4 Flexboss 21 - Biggest hybrid solar inverter on the market!

[@WillProwse]

Very nice

[@harddisk3000000]

MAN THIS THING IS A MONSTER,

[@dackjohnson3922]

I have the PowerPro battery installed. Flexboss going up later today along the Gridboss. I've hired an Electrician to wire the grid and breaker panels but I'm wiring the battery to Flexboss and Flexboss to Gridboss.. Love to see some install videos as this is my first installation of this type.

[@bearupfarm1818]

The unit is very new and hasn’t proven itself yet. It better to see it up and running with hours to prove it worth buying. Just like anything new with all modifications and needs to run for a while to get all the bugs fixed

[@unpluggedtexan]

@@bearupfarm1818 I agree. I’ve talked to EG4 about how much testing they’ve put this through also. And it’s built on the 18kpv architecture so I don’t foresee it having any significant issues.

[@GavinStoneDIY]

The higher output with solar is what really interests me. I really like that feature.

[@stacyhackney6100]

Thank you

[@gerharddohne2980]

Thank you for this review and for taking the time to break down the 200A pass-through.

[@andyfromtoystory7426]

I got two on the way, glad to see reviews to start coming out

[@cedarpeaktrucking763]

Great video, I'm encouraged by EG4's progress in the space. Cheaper than my Sol-Ark 15ks and seems to do everything I need. I'll be switching to EG4 in the future for all of my off-grid builds

[@electricandlspower]

Hell yeah u are the first to review.

[@freddielightford9781]

hardly a review he basically read off what the website says

[@offgridgarageUSA]

I just received my FlexBOSS 21 yesterday and the GridBOSS the day before. I'll be mounting them soon inside my big shop as well as the 40 410 watt panels. Hooking them up to 3 battery (300 amp hour) banks for a total of 900 amp hours! I'll add a 4th soon. I'll also hook up the 15 Kilowatt generator I have. Also, will be hooking up the new style chargeverter GC when needed.I love this stuff! ;-) Keep rockin' down there in Texas... maybe I'll join you some day! 🤓

[@charleshill7184]

I'm currently working w/an independent designer to help me with all my documentation for interconnection and permits. Got the link thru Brian's e-mail subscription. Totally worth signing up for!

[@Waldoe16]

Sol-Ark has some tough competition here

[@MyGoogleYoutube]

After the Deye mess I want nothing to do with Solark.

[@randya9143]

It is EMP hardened from what I was told at the EG4 Summit a few weeks ago.

[@tjmooney4181]

Thanks 🎉 just ordered mine to replace my 18kpv and play with as im 💯 off grid

[@norsk54472]

thanks for the review - nice unit

[@reviews2you]

I agree the Flexboss seems like a good alternative to the 18kPV. It will be nice once they add a screen option, I prefer having a screen backup along w/ the app. It is curious that the MPPT efficiency from PV to battery and PV to grid is less efficient than the 18kPV though?

[@michiganengineer8621]

Added as a sub so I can hear your take on the GridBoss. Looking at the EG4 site online that unit looks to be PERFECT for a hybrid setup that tries to be mostly off grid. As you might guess from my user name, I have to plan for a little bit more wintery weather than you and @WillProwse do, so being able to add more panels is ALWAYS a good thing!

[@unpluggedtexan]

Yeah you nailed it. The gridboss is made for people like us who have the grid as our backup only and want to remain offgrid as much as possible.

[@michiganengineer8621]

@@unpluggedtexan Herself would prefer to be completely off grid, although she still wants gas for cooking (go figure). Just noodling a bit and (assuming I played the right numbers) a pair of the Boss21's with maxed out solar and battery for each with a Gridboss, being fed by the two FB21's, plus rooftop via micro's, big generator and the grid would probably be around $100k (plus install). Like I said a wet dream IF I play the right numbers LMAO

[@unpluggedtexan]

@ yeah that would be an enormous system. But getting one gridboss and flexboss with 30 kwh’s of battery storage and solar panels would get you not reliant on the grid much, and you can always expand as your budget allows.

[@roslynandbobchauvin2378]

@@michiganengineer8621 If you have natgas/methane coming to your house, I'd keep that. Electiric for heating/cooking can chew through battery. If you are on propane, still may be worth keeping that for heat/cooking.

[@michiganengineer8621]

@@roslynandbobchauvin2378 Oh we'll be keeping gas, even in our "win the lottery build". Probably a big, buried propane pig primarily for cooking, but also for a genset since we likely wouldn't need a monster sized one. Heating (inc. hot water) and cooling will be geothermal heat-pump.

[@sneakypete830]

Good stuff, looking forward to seeing how you wire up your system into the gridboss.. I had some concerns where my existing grid sell back meter would go as i also have my main meter.

[@sh839c]

You make excellent videos, thanks.

[@JoeCoolR1]

Another great review. Thanks for all the information. I was going to do the 18Kpv, but now I'm going to install the BOSSes. My Grid and Flex are going to be separated quite a bit. The batteries will be near the Flex. I understand there's only one cable that needs to go between the Flex and Grid. Will you cover that in your review of the combo setup?

[@copisetic1104]

I don’t sell back to the grid, does it have sine wave matching from the grid so it will bleed power in as needed to supplement power supply if needed.

[@unpluggedtexan]

@@copisetic1104 yes. It will operate just like the 18k Pv where the grid will assist when needed without issue.

[@ter450]

Thanks for the review. I am curious if the application can work only using wifi, i.e., no internet connection. In a regional grid down scenario, this would be a concern since there is no longer a display. I am looking forward to your schematic, especially since your prior video discussed placing an inverter bypass switch in place for system maintenance. I believe this would perform that function.

[@hubbellc]

Thoughts on if theres room to install a din rail and a Tigo RSS transmitter inside the flexboss for a rooftop installation? Also, i see the manual recommends a PV disconnect but whats that knob on the side then? Would you recommend an external disconnect?

[@larrymiller7128]

Do u have to have the same PV? Right now, I have 2 separate systems: 1 10kw 6kw. If I upgrade, can I use my solar panels.. I have 20 550 n 22 320 watts

[@unpluggedtexan]

I could put my existing 19,200 watts on the flexboss21 without issue. But I plan on doing a smaller array with it since it will only be powering a 1 bedroom studio and workshop.

[@randya9143]

@@larrymiller7128 The manual says to use the same panels on each input . Meaning input one should be the same power and make on all panels (example:405w) but input two could be different power and make ( example: 500w). Also if string total watts are different put the highest wattage string on input one.

[@larrymiller7128]

@randya9143 good to know. Now I can run everything on 1 inverter n 1 subpanel n using what i alreadyhave... Thank you

[@alexherrera3918]

dors the 6000xp has pass through capability?

[@MarkBernard-s4j]

Hey good morning can you please send me the wire wiring diagram for the grid boss please? Thank you.

[@unpluggedtexan]

@@MarkBernard-s4j I don’t have it ready yet. Still in process of wiring it all together. I probably need another 2 weeks.

[@MarkBernard-s4j]

Ok cool

[@simon359]

Can you use the grid boss for other branded inverters?

[@unpluggedtexan]

@@simon359 only specific EG4 inverters (18k PV, 12k PV, and Flexboss) at this point. There has to be closed loop communication between the inverters and gridboss. Maybe they’ll add other brand inverters down the road, but I doubt they will. Just my opinion though.

[@tjmooney4181]

Does it match the indoor battery conduit boxes the same as the 18kpv for easy swap?

[@jamesshowalter6362]

yes

[@tjmooney4181]

@jamesshowalter6362 great thank you

[@randya9143]

I got my Flexboss the other day and installed it with the outdoor power pro and the conduit box . It fits all the knockouts perfectly & makes it a simple install. Now just need to install the Gridboss and wire everything up. I have that planned for the weekend.

[@tjmooney4181]

@randya9143 thanks a lot I ordered my flex boss yesterday. I live 💯 off grid and plan to replace my 18kpv paired with 4 powerpro indoor batteries

[@MyGoogleYoutube]

​​@@tjmooney4181 If you got a Gridboss you could run your 18kpv and the Flexboss in parallel. That would be a lot of power and protection if you had an inverter go down.

[@kacykoelliker5817]

Did you say 113? Spec says operating temperature is 140F

[@unpluggedtexan]

@@kacykoelliker5817 weird. I could have sworn I saw 113 degrees in the manual. But it does say 140 degrees. So that was my mistake.

[@kacykoelliker5817]

​@@unpluggedtexanAh thanks buddy; I'm in Phoenix so 113 ambient would be a deal breaker. I'm back in the game!

[@justlikeyouful]

My house has two smart meters. One for two geothermal units. The other is for the rest of the house. Anyway a FlexBoss/GridBoss combo can take some of the load off both 200amp panels as needed?

[@unpluggedtexan]

I wouldn't try and feed 2 different 200 amp panels from one gridboss/flexboss. I would rather put two separate systems in. That being said, you could put a 50amp breaker inside the one 200amp panel that the Gridboss/flexboss is feeding, that 50amp breaker can feed another 50amp breaker inside your other 200amp panel. Then that 200amp panel would have access to share power from your system. You would need a lockout switch to make sure both the grid and the gridboss/flexboss aren't feeding power at the same time. Those are the two ways I would do it. But disclaimer, I'm not a licensed electrician, so it would be best to get their opinion on that.

[@justlikeyouful]

@unpluggedtexan Sounds reasonable. The thing I would need to avoid is back feeding the grid during a power outage if I setup something too complex. I'm going to hit up some DIY forums and then ultimately a licensed electrician once I have a rough idea of possible configuration scenarios.

[@USA-GreedyMenOfNoIntegrity]

Now tell me which solar panels EG4 or anyone else sells so that I can max out PV power input.

[@charleshill7184]

Signature Solar sells Hyperion bifacial 400W with just look to be a perfect fit. I put this spreadsheet together to compare panels for my home solar project I'm working on. docs.google.com/spreadsheets/d/1oUrLGmyoo4mlzljMLdJiGWVzglnN-L1KWMp0aWwTH_8/edit?usp=sharing

[@randya9143]

@@USA-GreedyMenOfNoIntegrity If you call Signature Solar their design guys can spec any system setup you desire.

[@seniordockman2946]

Doing away with green subsidies is the goal, but stop subsidizing gas and oil as well. Google it- we have subsidized gas, oil, and coal to the tune of trillions over the last hundred years.

[@roslynandbobchauvin2378]

Why get rid of the green subsidies to taxpayers?

[@ter450]

​@roslynandbobchauvin2378 there is talk with several people at the federal level, though I agree with removing oil tax breaks and subsidies as well. Corporations get tax breaks, yet the plan is to remove citizens tax breaks. Yes, some political points, but facts.

[@HybridShedIraq]

This is not the biggest hybrid inverter on the market we have high voltage dc inverters 3phase 400v 50kw deye. It can take up to 100kw of solar and use 80kw of solar.

[@unpluggedtexan]

I should have mentioned it’s the biggest hybrid inverter made for residential use. That is the claim EG4 is making. I haven’t seen anything bigger available for residential DIY’ers to get their hands on. And with the dumb decision Deye just made remotely shutting peoples inverters down I have a feeling EG4 is going to start dominating this market. But we’ll see.

[@freddielightford9781]

why make a video but cant supply any real life data you gave us no more information than if i just went to signature solar website