[zilo]

I have 60kwh of lithium batteries.

Previously i had 100kwh of lead acid.

lead acid is absolute rubbish now.

You need to never discharge them more than 20% from full, else they crap themselves really quickly.

So a 100kwh battery bank is useful for 20kwh.

A lithium bank can be discharged almost to zero repeatedly.


But...the most important point is the charge rate, lead acid can rarely take more than 10% of its capacity per hour...so it is described as a C10 rate.
It means you probably will not have enough hours in a day to recharge a battery bank.

My lithium bank has a C1 maximum charge rate...so I can recharge the entire 60kwh in ONE hour of sunshine (if I have enough panels).

That is a huge advantage....and lead acid is just a stupid option.


As far as batteries in the suburbs the trick is to have a time of use tariff and not have any solar panels at all....

Charge the batteries when power is cheap and run off batteries 100% of the time.

In my case peak is 32c/kw and off peak is 12c/kw.

Instant reduction in power bills by 65% approx...and immunity from blackouts.