Battery ROI calculator

This is a simple return on investment calculator.

It assumes that the battery is charged with energy generated onsite from your Solar system (or is taken from an energy retail tariff that has a super off peak period) so has a cost of $zero / kWh.

It assumes that the energy is then discharged at a peak time. There may be more / less benefit depending on how and when you charge / discharge your battery.

Description	V14 example	Your details
1. Nameplate capacity (kWh)	14.3 kWh	kWh
2. Discharge depth (%)	95%	%
3. Available storage (kWh)	13.585 kWh	0 kWh
4. Your peak rates ($/kWh)	$0.35/kWh	$/kWh
5. Battery rate ($/kWh)	$0	$0/kWh
6. Difference in charges ($/kWh)	$0.35/kWh	$0/kWh
7. Your average daily usage (kWh)	22 kWh	kWh
8. % of daily load covered by battery	50%	%
9. Total daily energy from battery (kWh)	11.00 kWh	0kWh

10. Actual % of available storage used daily	80.9%	0%
11. Savings per day	$3.85	$0
12. Savings per year	$1,405.25	$0
13. Cost of fully installed system	$4,800	$
14. $/kWh of installed capacity	$335.66/kWh	$ 0/kWh
15. Return on Investment (ROI)	3.42 years	0 years