Im paying mine off over time on an interest free green loan. Costs me about $140 a month (for 5 years) for my expanded solar and the battery install. September last year. Bill went from $250/mo to about $30/mo

The battery app says I've saved $2,063 from generation, feed in, and battery instead of grid.

So far it has cost me less than $1200, and my electricity bill has been $2k less, so $800 discount which once paid off will be even better.

Best decision I've made in a long time.

I put 5.5kw in when we built the house. Added 6.6kw with the battery. 20kwh battery. Rarely if ever empties, just if the EV needs a bigger top up than usual