Michel KuenemannTonight I have removed the 8 lead-acid batteries out of their box:
Before start:
Removal in progress:
The box is empty now:
The pieces of wood raised the batteries a bit. The green part is a liner that would have avoided the catastrophic consequences of a battery leak. Lead-acid batteries contain sulfuric acid...
Just for fun, I have placed two new Li Ion modules - These two small modules weighing about 6 Kg store more energy than a single lead-acid battery weighing 60 Kg.
Close up on the modules:
The long copper bar serves for attaching the future modules coming in parallel with the first one.
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I guess I killed my batteries because during the first months (entry into service took place in autumn 2013) I did not manage to fully charge them regularly and they stayed in a partial charge state during a long time. I think that this was the cause of sulfation. Partial charge state is known to be very bad for lead acid batteries.
The nominal energy of the pack was 48 X 440 = 21 kWh. I used only 6 kWh (less than 30 %) each cycle.
What kind of batteries have you installed ? Do they last ?
Thank you - Michel
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wow its amazing that your batteries died in just two years.
how deep were you discharging them?
Are you sure? yes | no