Dave, I would suggest stepping up to 48 nominal, fortress 18.5, battery 12 or 15 k solark inverter, re-wire the array to single or dual string, make the wiring in the home capable of 240, this usually requires main panel re-work and set up the monitoring. Batteries are like replacement heart valves, never get startups or small manufacturers as so many disappear and now you are stuck. Fun times.
On Tue, Sep 17, 2024, 8:19 AM David Palumbo via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > Wrenches, > > I have a nice little rental house here in my off-grid neighborhood that > after 40 years is ready to transition to LiFePO4 batteries. > I have no experience with any lithium home power storage batteries. I'm > looking for advice, so I can avoid mistakes as a rental house with battery > problems is quite the pain in the ass. The last tenant was my daughter so > life with older lead acids wasn't a huge issue, but now I want something I > won't have to enter the house to monitor and operate. I'll bullet what I > think I know and my questions. > > - The house has four 11-year-old Trojan Industrial IND 17-6 for 925 AH > @ 24V that are amply sized for the houses loads. > - It has a newer TriMetric meter that I was supposed to be able to set > up for web access using their WIFI module, but I have had no success with > being able to monitor battery state of charge remotely. > - I really need something that will give me battery state of charge > information without entering the house. > - The system has a single OutBack VFX3624. PV array is 2.5kW. > - System also has a Iota 40A charger so charging with my 6 KW genset > is typically in the 100Amp range with the OutBack and Iota. > - We are in northern Vermont, so we rack up significant generator (NOT > auto-start) run time in the winter months. > - I'm looking at Eclipse LiFePO4 24V 200AH. Three of these will give > me 600AH @ 24V which is 65% of the rated Amp Hrs of the Trojan Industrials > now in use. Is this enough? > - My battery box can easily handle up to four of the Eclipse 24V 200AH > batteries. I see that Backwoods recommends that only three of the Eclipse > are connected with battery cables. If I opted for four (for 800AH) I would > need to use a busbar. > - Are there other distributors of Eclipse batteries other than > Backwoods Solar that I should consider? I haven't used my dealer account > with them for a number of years and I'm not sure that I'll get a good price > from them. > - What is the lead time for getting these batteries shipped out? > - Are there other LiFePO4 batteries I should consider? > - Is 600AH of LiFePO4's enough to replace 925AH of LA's? > > Dave Palumbo > Retired from running Independent Power, but active in off-grid solar. > Hyde Park, VT > 802-371-8678 voice or text. > _______________________________________________ > 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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