Installing 2 Tesla Powerwall 3 with 9.7kW solar. Full home backup.

[@Speedlimitreviews]

Mannn I wish you were in Florida. Very clean install and great video.

[@SolarEngineering]

appreciate your feedback

[@viadharmawheel]

Yep, I am looking for a similar system for my home in Florida. Now they have the Powerwall extender so you can save a few grand or so with that. Want to stay under 10kW so insurance companies don't complain. The 27kWh on the Powerwalls should last the night in a power outage on a newer 3k home. Unlike CA, it rains quite a bit more in FL and need a good installer. There are a few, just have to get recommendations and see their work.

[@JBoy340a]

Very clean install. It looks like the PW3 is easier to install. We have PW2 and Tesla did our install and they were here for 2 days. And a number of additional connection units and boxes were necessary.

[@tvguide4khv]

Now, after years of development, Tesla Solar + Battery + EVtoGrid backup became most streamlined and efficient process. What with price comparison?

[@SolarEngineering]

Tesla Powerwall 3 price is about %25 more than Sol-Ark 15k (inverter only, no batteries). Installation is much easier as well.

[@viadharmawheel]

@@SolarEngineering So total cost is a wash or still a bit more?

[@jamesolsen9599]

i have been trying to find out info you say connecting 2 powerwall 3s together gives you 23kw are you sure everything i have read say not

[@SolarEngineering]

please show me source where it's saying output is not doubled.

[@walkerdarin2003]

my solar company cheaped out and I didn't catch it in the contract. I'm having to wait for the DC expansion PW3. I have just the one PW3 with inverter at the moment. Nothing like waiting for a product that isn't out yet....

[@LordStevie]

I have two Powerwall 3, but with the inverter only connected in one.

[@trac1Digital]

Was there any issues with PGE and/or the inspector with the installation of the Tesla backup switch. Specifically re: the gas meters proximity to meter and panel?

[@SolarEngineering]

no issues, but it's on the edge of allowed clearance

[@itsjaynguyen]

Only thing is I would have put the disconnects side by side as I don’t think they are rated to have a knockout at the top of the disconnect.

[@photonqopt]

I have only one conduit from the roof to one powerwall 3 and the 2nd power wall does not have anything connected to solar panels on the roof. Does it mean that solar panels are not evenly distributed between two pw3 units?

[@SolarEngineering]

Do you have conduit connecting two Powerwalls? Solar might go in this conduit

[@photonqopt]

@@SolarEngineering thank you for the reply. There is a conduit between two PW3 units, but that goes to the left side of the 2nd PW. Maybe, I'll ask the installer tomorrow.

[@ZachSolar]

Very nice! Are you using PCS on these multi-Powerwall installs to avoid additional electrical work?

[@SolarEngineering]

PW needs 60A breaker. So for 200A main panel PCS is needed

[@punksjutgbd]

Nice install as always. Link to RSD button and phase marker?

[@SolarEngineering]

thanks! button: www.homedepot.com/p/ASI-Emergency-Stop-Button-Control-Station-with-Visual-Indicator-Push-Pull-to-Release-Vertical-Wire-Entry-SLA11NPNCGMS360/314634820 marker: amzn.to/3UWkbS0

[@jarrelljulien5673]

I thought you had to use a gateway if you’re installing more than one PW3. Has Tesla started to allow homeowners to install their products themselves?

[@SolarEngineering]

Gateway not needed. Upto 4 powerwalls 3 can be installed as part of one system. Only Tesla certified installers can do install.

[@gojeffgordon24]

Will the Powerwall 3 work with AC Coupled solar panels? I have SolarEdge. Just want to see if the panels will still be able to charge the Powerwall in a grid down situation. I know some inverters can do this by using the frequency shifting.

[@SolarEngineering]

yes will work, but need to install Tesla Gateway instead of a backup switch.

[@cjb8993]

Question; will the Tesla power walls allow for an inverter to be installed to facilitate a whole house generator? I'm seeing that the power walls don't want to play with 3rd party inverters that would facilitate such a set up.

[@SolarEngineering]

no, as of now Tesla doesn't support generators.

[@cjb8993]

@@SolarEngineering thank you!

[@shubhamshinde2120]

As always awesome videos. can we use one RSD for 4 tesla powerwall batteries? Would love to check your video of 4 powerwall installation.

[@SolarEngineering]

by RSD you mean emergency stop button? If yes, then I only found a button that can fit max 3 contacts.

[@willshakespeare38]

Great work love watching your videos - quick question - can you connect 2 Tesla gateway 3.0 in parallel ?

[@SolarEngineering]

I don't have much experience with Gateway yet. I'm assuming you want to parallel them for 400A service?

[@willshakespeare38]

Yes that’s correct - backup switch won’t work for 400A

[@SolarEngineering]

@@willshakespeare38 haven't done yet..

[@willshakespeare38]

Thank you - do you have a link to purchase the Tesla microinverter for solar panels ? I’m looking at a ground mount install with third party solar panels

[@mondotv4216]

Isn't there supposed to be 3 ft clearance around each PW3?

[@SolarEngineering]

Tesla has ul9540a certification which allows less than 3' clearance.

[@nickjamora6684]

I have 28 panels and 2 powerwall 3. Tesla made 4 strings (9, 9, 6, 4) and connected all 4 strings to one powerwall. Is it more efficient to have 2 strings on each powerwall (9+6) and (9+4)? How much efficiency am I losing with all strings connected to one Powerwall 3?

[@SolarEngineering]

about 5% loss due to DC-AC-DC conversion

[@photonqopt]

It's interesting that Tesla didn't follow the procedure in its own instruction material. kzbin.info/www/bejne/qnK6pWaNl7iiqrssi=ZxYbmGAGmq-RfeGk&t=28 My contractor just installed 2 powerwall 3s, but only one PW is connected to the conduit coming down from the roof. Does it mean that the second PW does not get the direct dc-coupled feed from the solar panels and that I have to live with 5% efficiency loss ?

[@viadharmawheel]

@@photonqopt Are you sure you do not have A Powerwall and Powerwall Extender? With the Powerwall Extender (can have up to 3 per Powerwall) only the Powerwall has the inverter.

[@chi.marvine]

Hi, I’m getting 23 panels installed with 3 powerwall 3. I think right now it’s grouped as two strings 11 and 12 panels going to two powerwalls. Should I ask to do two 8 panels and one 7 panel each going to its own powerwall? They said it’s most efficient with it grouped to two strings. What are your thoughts?

[@SolarEngineering]

3 strings, one to each powerwall to charge dc to dc will be most efficient

[@chi.marvine]

@@SolarEngineering Thank you! I'm having Tesla change the design planned to split to just two PW3

[@Devlin-o5u]

How do you guys comply with 705.12 in this setup, did you use PCS feature?

[@SolarEngineering]

yes, powerwall + backup switch PCS certified

[@Devlin-o5u]

@@SolarEngineering So, PG&E approved it without proper PCS labels? Or you just indicated it like a note on the planset? Thanks!

[@SolarEngineering]

@@Devlin-o5u there label attached to main panel, just didn't get on the video and planset has info about PCS as well.

[@AshaTea]

It looks like you guys work in the Bay Area? Can I ask for a quote :)

[@SolarEngineering]

feel free to contact: [e-mail]

[@Studio888art]

I thought the batteries had to be 3 feet apart...

[@SolarEngineering]

depends on the AHJ. Tesla has UL 9540 certification that allows to install less than 3', but some AHJ still require 3'

[@scottsantella7850]

What size is the MSP?

[@SolarEngineering]

200A

[@LordStevie]

Were these installers Tesla employees?

[@SolarEngineering]

@@LordStevie no, it's cerified installers from Solar Engineering.

[@GerardoAguilar-kq3lw]

@SolarEngineering Stupid question but I thought Tesla Power wall 3 was not stackable?

[@SolarEngineering]

correct, we cannot install PW3 in front of PW3. PW2 was stackable and we can install few of them in front of each other (search for images: "powerwall 2 stackable"). Because all of the connection in PW3 under the front cover, we cannot cover it with another PW3.

[@GerardoAguilar-kq3lw]

@@SolarEngineering I was using the wrong terminology, I was saying stackable but I guess the correct term is scalable. Thank you for replying

[@lavacano]

damn i was gonna watch the whole thing but then i saw a lb where you should have lr'd and i couldnt

[@TheLobo91]

I'm not buying any powerwalls until they get vehicle to home working so I can use my Teslas battery to supplement the powerwall during blackouts.

[@suvari225]

Yeah that would be really good.

[@BillB33525]

Yes, V2H is the way to go! Install a small P/Wall to hold the home till the car can be plugged into the P/Wall.

[@viadharmawheel]

CT supports this I believe. Let's see when the other models ad the support. Heck, the Nissan Leaf has had this support for a while.

[@TheLobo91]

@@viadharmawheel it doesn't. What ct is doing is converting the battery DC to AC and running it through the service panel. The problem is if you need to drive your car, your house won't have electricity but if it was dc your powerwall would kick in. It needs to be DC from the CT to DC on the power wall. Gm and ford has this now.

[@RunStepN]

вот из ё нейм)))

[@WEVA111]

How much does this setup cost?

[@SolarEngineering]

$45k+

[@WEVA111]

@@SolarEngineering thank you for replying

[@viadharmawheel]

@@SolarEngineering Currently the Solar Tax credit is 30% correct and includes pretty much the entire install including batteries? So if you qualify then about 15k in Federal can be saved?

[@SolarEngineering]

@@viadharmawheel correct, 30% parts and labor for solar installation