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Simpliphi batteries anyone?

 
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Greetings. We’re thinking of “modernizing” our 20 year old solar powered house. Running 24 volt newer magnum inverter ( capable of 220v), and now using 4 Trojan ind 17(?) 6 volt monsters.
The present idea is to go with 2 Simpliphi 24 3.8  batteries which should theoretically run our place for over a day and not be fully discharged.  We’d keep the Trojans for a separate system.
does anyone have experience with these simpliys? Are they good? Are they worth spending 2200 each plus shipping) ($250) plus an expert to do final hookup so they’re warranty is good?
Thanks to all you experts out there! Tom
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pollinator
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Tom and Jenna Moran wrote:Greetings. We’re thinking of “modernizing” our 20 year old solar powered house. Running 24 volt newer magnum inverter ( capable of 220v), and now using 4 Trojan ind 17(?) 6 volt monsters.
The present idea is to go with 2 Simpliphi 24 3.8  batteries which should theoretically run our place for over a day and not be fully discharged.  We’d keep the Trojans for a separate system.
does anyone have experience with these simpliys? Are they good? Are they worth spending 2200 each plus shipping) ($250) plus an expert to do final hookup so they’re warranty is good?
Thanks to all you experts out there! Tom


I worked for a company that installed a few systems and did the analysis of competing batteries. If I was to choose a lithium system I would use simpliphi. The cels they use have been tested for their recommended cycling. The only unknown I had was the BMS system was complex and Must function  for the batteries to work. Lead acid is low tech as you know and hard to kill. Cost wise? Not sure. If everything works as advertised the cost will be roughly 3 time lead acid and give you 4 to 5 times lifespan depending on how hard you cycle. I find lithium is best if your array and or generator is very large and you want to take advantage of lithiums ability to quick charge.
Cheers,  David
 
pollinator
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Wow, Incredible Hulk industrial batteries you have there. The specs say they are 415 lbs each. And 925 Ah!
https://www.trojanbattery.com/pdf/datasheets/IND17-6V_TrojanRE_Data_Sheets.pdf
If it was mine I would completely rewire the system, tidy it up, and do a equalizing charge.
I don’t now anything about Simplphi so no comment except I am also wary of complex internal BMS systems that come with drop-in-batteries. It seems to me Lithum make sense for mobile systems where size and weight are critical. If I was buying for a fixed system I would be considering nickel iron batteries.
How many years have you had the Trojans?
 
Tom Moran
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Thanks Jeremy. We’ve been running these ind17 now for 5-6 years. All well so far. We do try to keep them above 24v with our (so far) trusty but cheap hft 8750 generator. Since we’ve an old array -24 80 w panels, it gets used a lot in cloudy weather.
 
Jeremy Baker
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Sounds reasonable. I think I see a hydrometer in the picture. I would be using it religiously on batteries that retail for $1200 each.
Have you looked at the Tesla powerwall battery option and external BMS systems? Another pricey option!
 
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Well worth watching
https://www.youtube.com/watch?v=gOqQp2Xjr6U
 
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