Solar Panel, Power & Battery Discussion

[exceladdict]

Sigenergy 3 phase 48kWh/25kW (battery capacity/inverter capacity)

In operation for 31days
Total 1.75MWh (1700kWh) have been sent through the battery

Cost of electricity going into battery:
10% at a cost of 8c/kWh (overnight tariff)
2% at a cost of 6 c/kWh (foregone solar FiT plus capital cost of solar + cost of capital , amortised over 20years)
88% at a cost of 0c/kWh (free tariff)

Cost of storing electricity:
=Capital cost of battery+ cost of capital amortised over warranty period and expressed as cents per warranted kWh. = 21c/kWh

Cost of electricity coming out of battery:
= cost of electricity to charge battery plus cost of storing electricity. So add 21c to the cost of electricity. Smaller capacity Sigenergy battery cost more on a c/kWh basis

Have a couple of acquaintances who have negative Amber experience so have left that provider.

I like the way you simplify this to cost of charging + cost of storage, makes it easy to decide if to sell when feed in tarriff exceeds the sum of these.

 

[Quickstatus]

makes it easy to decide if to sell when feed in tarriff exceeds the sum of these.

I only use the battery for the house , I don't export from the battery, only solar excess.

But yes people forget that there is a cost of storage. Some even think the battery produces free electricity.