Powerwall 2

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Powerwall 2

Postby aabento on Wed Sep 27, 2017 4:31 pm

I need to replace my aging Deka AGM batteries.

I was looking at the Tesla Powerwall 2 14kwh system which seems to be competitively priced. It seems this systems requires AC to power it and has a built-in DC to AC to provide output power.

Can this work with my existing solar PV system? I have an older system, as follows:
2 GFX-3648 inverters
1 Flexmax 50 charge controller
1 Flexmas 80 charge controller
Mate 1

This is a 48 volt grid-tie & backup system with 6 kw total panels installed.
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Re: Powerwall 2

Postby Sandra Herrera on Thu Sep 28, 2017 2:56 pm

My suggestion is to contact the battery manufactures, my understanding of this product is very limited but thought the DC voltage was outside the accepted window on the Outback products.
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Re: Powerwall 2

Postby koalamotorsport on Fri Oct 20, 2017 7:45 pm

My understanding is that there are two different versions of the Powerwall2.

There is an "A/C coupled" version that has a 50V DC inverter in it, that could be wired into an existing hybrid grid tie system such as yours.
Then there is a high voltage "DC coupled" version that runs at 400+ DC volts. That one, which is similar in specifications to the original Powerwall, is not compatible with your system.

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