Battery Storage

[Juice]

If you can source them, use old secondhand forklift batteries.
They may have lost their 'high torque power' for use in forklifts but still have plenty (years) of life left in them for 'deep cycle' power usage and storage.
Built for purpose.

Yes, for battery storage empty out the acid - and be careful about it!

Use only distilled water to top up batteries.

Do your own research - not sure on the technic but from a dry fill of distilled water a battery can produce its own acid.

Cheers Juice.