On-site renewable annual benefit calculator

Value on-site consumption and exports at their applicable prices, then deduct incremental operating cost. Export compensation depends on the stated agreement.

B = E_{\text{self}} \times p_{\text{retail}} + E_{\text{export}} \times p_{\text{export}} - \mathrm{OM}

Calculator

Enter the values you know and leave one box empty. Calculate finds the empty one, the result or any input.

Worked example

Given

$E_{\text{self}}$ = 180,000 kWh/yr
$p_{\text{retail}}$ = 0.16 $/kWh
$E_{\text{export}}$ = 60,000 kWh/yr
$p_{\text{export}}$ = 0.05 $/kWh
$\mathrm{OM}$ = 2,500 $/yr

B = 180{,}000 \times 0.16 + 60{,}000 \times 0.05 - 2500 = 29{,}300

Symbols and units

Symbol	Meaning	Unit
$B$	annual net operating benefit	$/yr
$E_{\text{self}}$	generation used on site	kWh/yr
$p_{\text{retail}}$	avoided retail energy price	$/kWh
$E_{\text{export}}$	generation exported	kWh/yr
$p_{\text{export}}$	specified export compensation	$/kWh
$\mathrm{OM}$	incremental annual operating cost	$/yr

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Results are estimates for study and screening. Check the inputs, units and assumptions before you use them for design, billing or contract decisions.