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

[Dave Angelini Offgrid Solar]

  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"
    [1]https://offgridsolar1.com/ [2]  [1]
e-mail  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
> 
> Owner|Principal, VT Solar, LLC
> 
> _Celebrating our 33st Anniversary 1991-2024!!_
> 
> dba Vermont Solar Engineering
> 
> 802.559.1225
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Links:
------
[1] http://members.sti.net/offgridsolar/
[2] https://offgridsolar1.com/
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