[RE-wrenches] How much Li battery?

Jerry Shafer jerrysgarage01 at gmail.com
Sat May 23 15:11:10 EDT 2020


Just me but that small l would be surprised  but again I like bigger gas
tanks over small ones

On Sat, May 23, 2020, 12:02 PM Mark Frye <markf at berkeleysolar.com> wrote:

> Humm, so maybe a 3kwhr would work for my situation.
> On 5/23/2020 10:55 AM, Jerry Shafer wrote:
>
> Mark
> The smallest battery I have used is the Blue Planet 8 kWhr. its a half
> stack in there cabinet with a 10.8 k PS-3 inverter system with about 6 k on
> the roof, 8 K is not much but this particular customer only uses this for
> some low demand power consumption that must operate. It is less expensive
> to go with 16 kWhrs vs 8 at a cost per watt also
> Jerry
>
> On Sat, May 23, 2020 at 10:37 AM Mark Frye <markf at berkeleysolar.com>
> wrote:
>
>> In the way back machine I remember being at a product roll out meeting
>> for the brand new Outback FX inverter. I asked the engineer, what was
>> the smallest battery bank that could be connected to the inverter. He
>> said on the fly that probably you would want the battery to "weight" at
>> least as much as the inverter. I thought that was a great answer.
>>
>> Fast forward, with a 4000w Outback Radian, AC coupled with 2000w of PV,
>> what is the smallest Li battery I would want for stable operation?
>>
>> My loads don't really need more than 40ah of capacity.
>>
>> What is the latest best practice on this?
>>
>> Thanks.
>>
>>
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