[RE-wrenches] Fortress LFP batteries and Outback charge controller

[Kirk Herander]

Yes, remotely at least. You need a mate 3S to monitor any outback product
if you want to see it on opticsRE.

But the Evault state of charge should give an accurate calculation,
regardless of where the charging Current is coming from.

*Kirk Herander / **kirkh at vermont.solar <kirkh at vermont.solar>*

*Owner|Principal, VT Solar, LLC*

*Celebrating our 33st Anniversary 1991-2024!!*

dba Vermont Solar Engineering

802.559.1225


On Sun, Jun 30, 2024 at 11:11 AM Dave Angelini Offgrid Solar via
RE-wrenches <re-wrenches at lists.re-wrenches.org> wrote:

>  You and the client lose the ability to monitor it all in one place do you
> not?
>
>
>
> *Dave Angelini Offgrid Solar
> "we go where powerlines don't"
>    <http://members.sti.net/offgridsolar/>https://offgridsolar1.com/ <https://offgridsolar1.com/>  <http://members.sti.net/offgridsolar/>
> e-mail  offgridsolar at sti.net <offgridsolar at sti.net>
> text 209 813 0060*
>
>
> On 2024-06-29 4:48 pm, Kirk Herander via RE-wrenches wrote:
>
>
> All,
>
> I'm wondering if there are any precautions if charging a Fortress Evault
> LFP bank using 1 or more OB charge controllers, in tandem with an Envy
> inverter PV input.
>
> I know it will have to be programmed differently, and it will be open
> loop, no CC control from the BMU,.
>
> This is a net metered system using a Fortress 12 kw inverter. The total PV
> input of the inverter is 21 kw. Max sell back is 12 kw, while charging
> batteries at 6 kw.
>
> My issue is the customer has his heart set on maxing out the roof capacity
> at 25 kw. And I don't really need to add a second inverter for
> critical loads, Only to increase integrated DC-coupled PV capacity.
>
> So I feasibly put part of the array on external charge controller(s) ,
> open-looped, and the remainder on a single 12kw Envy inverter.
>
> A second inverter also increases the AC capacity, and as a result,
> involves a more comprehensive review for net metering approval in Vermont
> (new trigger for additional review is greater than 15 kw AC)..
>
>
> --
>
> *Kirk Herander / **kirkh at vermont.solar <kirkh at vermont.solar>*
>
> *Owner|Principal, VT Solar, LLC*
>
> *Celebrating our 33st Anniversary 1991-2024!!*
>
> dba Vermont Solar Engineering
>
> 802.559.1225
>
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