Continuing the discussion from Solar power advice?:
Okay, we have been churning through 12V batteries. We killed 3 smallish SLAs first. They were purchased at varying intervals and died at varying intervals.
We then purchased a regular ole 12V deep cycle marine battery. Someone then wanted to add to our battery bank, and purchased the same 12V marine battery to add to the tiny bank. Those batteries were purchased 16 months ago. The water levels are good, they have never dropped. However, they are down to charging in 20 minutes and running for under an hour with light draw (under 100W).
There are many potential reasons forthe short life. In general, we have been hard on batteries in terms of cold, usage cycles, and charging.
The advice I have received is that we should be running 6V batteries in series-parallel rather than 12V in parallel. I understand this is recommended, but do not clearly understand why.
We have now replaced a faulty generator and a faulty charger. The charging in winter is via a NOCO Gen2 charger providing 12V @ 10A x2 banks (20A total = 240W nominal). Charging in summer is via Renogy 100W solar panels x2 (200W nominal).
What are recommendations for the most bang for the buck batteries?
Currently, I am considering 4 of these…
They are 6V deep cycle “golf cart” batteries. Reasoning: not much. They are available in Fairbanks, which is a difficult market to shop in. Frankly, 4 of them is out of our current budget, but I can’t get any work on this project done without a functional battery bank.
So, I guess I am asking for reasons why I should spring for these.
Also, is there a good alternative for 12V x2 deep cycle that is more economical? All of the options I am currently seeing are hybrid starting and deep cycle. This seems like a bad option.