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Frank Krijnen
22nd July 2019, 01:55
For a soil-science research project we have a solarPV system (2.4kWp) mounted on a trailer roof (flat). It is combined with a ~22kWh lead acid battery bank (24V) in the trailer.

A solar company here in town (Saskatoon,SK), recommended a system with 12 batteries:
4x (6V) in series, with three strings in parallel. So i have a total of 12 6v batteries (315ah each).

The power use is very stable: 280W continuously. For our research we need data particularly on rainy days, the battery-bank is therefore larger than normal. (3x daily use).

How does one monitor the health of a battery bank like this?
Is it at all a good ides to have three strings of 4 batteries?
Should a common bus be installed between all parallel batteries in the bank?

Thanks for all your advice!

Rob Beckers
22nd July 2019, 05:42
Hallo Frank,

I've written an article that answers just those questions. It's not great in terms of layout (was a quick write-up, and the hope is to find the time someday to rewrite it properly), the info is there though: https://www.solacity.com/lead-acid-battery-care/

-RoB-