Old 10-19-2020, 11:28   #871
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I haven't found Lithium 12v prices anywhere close to Lead acid. Please post your source/business you are using for parts. I am very interested.

Also, I know you won't need as many amp hours with lithium compared to lead acid.... Are those 12v /50amp hour lithiums?
I wasn't replacing 12v batts. We had 24 2v deep-discharge batts. The 2v batts were Rolls Surrette 1300+ Ah and each was roughly $400 and 130#.

And, since we put in 4 new Simpliphi batteries I figured that they were 12v but they are each 48v. (My solar guy rattles off numbers like I actually speak his language.) Each is 75 Ah for a total of 300 Ah. They each weigh about 78 pounds. They cost about $2500 each. (The total replacement price doesn't look the same at first, but the labor to install 24 batts is a lot more than to install 4. )
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Old 10-19-2020, 11:58   #872
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24 lead acid batteries is a metric buttload of maintenance.

TR
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Old 10-19-2020, 12:06   #873
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24 lead acid batteries is a metric buttload of maintenance.

TR
That's why I replaced them early. In the summer I had to add water every week. And, because they were so tall, I had to wear a headlamp and use a turkey baster and mirror so I didn't under or over fill them. In the winter I only had to do that once a month. Four times a year I had to equalize them and that was dependent on the cloud coverage. And twice a year we'd have to go to the backup gennie so we could clean the terminals. All-in-all, it wasn't too bad but now I don't have to do any of that.
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Old 11-09-2020, 00:38   #874
G2squared
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Originally Posted by Sacamuelas View Post
I haven't found Lithium 12v prices anywhere close to Lead acid. Please post your source/business you are using for parts. I am very interested.

Also, I know you won't need as many amp hours with lithium compared to lead acid.... Are those 12v /50amp hour lithiums?
FWIW,
Lithium batteries will be more expensive, but itís the trade off in maintenance and power cycles ( typically rated over 2000 full discharges, you kill lead acid batteries very quickly doing that) and draw capabilities that youíre paying for. I bought a few 108Ah batteries for replacing failed 6V 70Ah deep cycle batteries in my travel trailer. They were from Costco and cost about $700 each. They only weigh 28lbs so are easily removed for theft prevention. Also found a few smaller 20Ah units for running radios and the grill when outside away from an outlet so I donít have to run a generator. The smaller ones can be found with little searching.

Solar is great but expensive initially. BEWARE (for those who donít know) if going with the sales pitch from your local HD, many systems are being sold with no capability to generate power unless there is power on your incoming lines already. So if the power goes out, they are worthless as backup. The issue is around meeting code and protecting linemen doing repairs. Then installing the right power inverter that those companies donít sell. Itís just stupid. But thereís a bunch of wall flowers out there feeling good about themselves for doing this type of install.
If youíve got running water near by, then itís the Gold Standard for self sufficient
power. Battery bank is still typically needed for surge loads, but a water wheel running continuously, even a small one, will make a lot of power over time.
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Old 11-10-2020, 15:15   #875
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...power cycles ( typically rated over 2000 full discharges, you kill lead acid batteries very quickly doing that) and draw capabilities that youíre paying for.
G2
The SimpliPhi warranty is 10 years and 10,000 cycles if the Depth of Discharge (DoD) is limited to 80%. Five thousand cycles if the DoD is limited to 90% and 3500 cycles to 100%. So far, in the 3 weeks that we've been using them, we haven't gone below 95%.
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