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

[Jay via RE-wrenches]

The evault doesn’t see the multiple inputs, just like any battery.  The envy % reading via web is working well. And yes it’s a bit weird to the solar from the inverter not add up to the daily charge numbers  But it’s working fine  If you follow oem charge instructions the open loop voltages are a bit lower than closed loop. So far in this offgrid system it’s not mattered with the 2 different charge settings. It’s still getting full.  When the array gets upgraded I’ll put everything through the envy.  But it’s got a bunch of 20 yr old panels that I didn’t want to rewire to 500v. So I kept the oldest ones on the 150v controllers  Hope this helps Jay On Jun 30, 2024, at 9:30 AM, Kirk Herander via RE-wrenches <re-wrenches@lists.re-wrenches.org> wrote:  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@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@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" https://offgridsolar1.com/ e-mail offgridso...@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@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 _______________________________________________ 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 _______________________________________________ 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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