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@vermont.solar <kirkh@vermont.solar>* *Owner|Principal, VT Solar, LLC* *Celebrating our 33st Anniversary 1991-2024!!* dba Vermont Solar Engineering 802.559.1225
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