Solar & battery
Solar Energy Savings Calculator
What solar takes off a power bill each month, allowing for the part of the bill solar cannot touch.
Result
A bill never reaches zero while the meter is connected. Fixed charges, minimum bills and demand charges survive any amount of production, and some utilities add a separate charge for solar customers. Check your own tariff rather than assuming the bill scales with usage.
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About this calculator
Why can the bill not go to zero?
Fixed connection and meter charges are billed for the service, not the energy. Many utilities also apply a minimum bill, so heavy producers still pay something every month.
What is self-consumption and why does it matter?
The share of your production you use as it is generated. It is worth the full retail rate; the rest is exported at whatever the utility credits, which is usually much less.
The formula
saving = self-used kWh x retail rate + exported kWh x export credit
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