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

[Jay via RE-wrenches]

No problem at all.  I just did a system exactly like that.  Works fine.  Jay On Jun 29, 2024, at 5:49 PM, Kirk Herander via RE-wrenches <re-wrenches@lists.re-wrenches.org> 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@vermont.solar Owner|Principal, VT Solar, LLC Celebrating our 33st Anniversary 1991-2024!! dba Vermont Solar Engineering 802.559.1225 _______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org

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