Third-Party PPA Calculator

PPA rate comparison vs utility rate escalation.

Annual electricity usage (kWh)

Solar offset target (%)

Current utility rate ($/kWh)

PPA rate ($/kWh)

PPA rate escalation (%/yr)

Utility rate escalation (%/yr)

PPA term (years)

Annual degradation (%)

Tab to move between fields

Lifetime savings ($)

$665,121.00

Year 1 savings ($)$12,000.00

Year 1 savings (%)25%

Lifetime PPA cost ($)$1,080,908.00

Lifetime utility cost (avoided) ($)$1,746,029.00

Crossover year (0 = never)0

Avg PPA rate ($/kWh)0.11

Final year PPA rate ($/kWh)0.14

Final year utility rate ($/kWh)0.27

Avg Utility Rate0.19%

How to Use This Calculator

Enter your annual electricity consumption in kWh from utility bills.
Set the solar offset target percentage and current utility rate.
Enter the offered PPA rate and its annual escalation rate.
Input your expected utility rate escalation and PPA contract length.
Review lifetime savings, crossover year, and final-year rate comparison to decide whether to sign the PPA.

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