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.
aabento
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Re: Powerwall 2

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

Hello,
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.
Sandra Herrera
Applications Engineering


OutBack Power Technologies
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Sandra Herrera
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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.
Thanks!
Brett

2 x GS8048
6 x MX60
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Wired to allow expansion up to 400amps
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