[loeg]

You'd spend $1000 to save $0.20 on electricity every day?

[testing22321]

The average price of power in Australia is 34 cents per kWh. The average Aussie spends A LOT more than $0.20 per day.

[loeg]

GP isn't talking about a full day's use, but "free electricity for an hour or two each day (or even each week)."

[testing22321]

The whole reason to spend the money on the battery is so you can use the free power for a lot longer than an hour or two!

[jay_kyburz]

You'll want to draw as much power as possible while its free, and use it duing peak times.

[byefruit]

7.3% return, not bad. As battery prices drop it will get even better.

[marcosdumay]

It's not 7.3% return rate. There's some depreciation you need to add there.

[WheatMillington]

If you're going to depreciate the battery then your return will be substantially greater than 7.3%. You can't use BOTH the capex AND the depreciation as your denominator, choose one.

[Rebelgecko]

Where I live, $1000 would get you about 3kWh of battery power, which would pay for itself in a couple years