SOLAR QUOTE AND SAVINGS WORKSHEET
Yenra | Updated September 7, 2026
Article: https://yenra.com/cost-of-solar-energy/

Use this record to compare written rooftop-solar quotes on the same basis.
Copy the blank fields for each proposal. Use actual bills and tariff documents.
All dollar amounts below are USD; the example values are fictional.

PROJECT RECORD
Address/utility: __________________  Review date: __________________
Annual household consumption (kWh): __________  Billing dates: ______
Roof condition and planned work: __________________________________
Installer and quote date: _________________________________________
Panels (DC kW): __________ Inverter (AC kW): ________________________
Annual production (kWh): __________ Monthly estimate attached: ______
Shading/orientation/loss assumptions and evidence: _________________
Solar-only cash price ($): _______ Battery option separately ($): ____
Included roof/electrical/permit/interconnection work: _______________
Excluded work, removal/reinstallation and replacement costs: ________
Warranty/service provider; labor and shipping terms: _______________

YEAR-ONE CALCULATION
A. Production (kWh): ______
B. Directly self-consumed (kWh): ______
C. Exported (kWh), A minus B: ______
D. Avoided VARIABLE purchase price ($/kWh): ______
E. Export credit ($/kWh): ______
F. Bill reduction ($), B x D + C x E: ______
G. Annual maintenance allowance ($): ______
H. Net benefit ($), F minus G: ______
I. Cash cost after VERIFIED received incentives ($): ______
Simple payback in years, I / H (only if H is positive): ______
Fixed charges remaining: _______ Actual tariff URL/date: ____________
Use interval-by-interval rates if the tariff varies by time.

FICTIONAL CHECK
Cash price 24,000; production 10,000 kWh; self-use 4,000; export 6,000.
Avoided rate 0.25; export rate 0.08; maintenance 180; incentives zero.
Bill reduction 1,480; net benefit 1,300; simple payback 18.5 years.
Alternative self-use 7,000 and export 3,000: bill reduction 1,990;
net benefit 1,810; simple payback 13.3 years. Values are rounded.

LIFETIME AND FINANCE CHECK
Repeat yearly with output changes, rates, maintenance and replacements.
Record discount rate and analysis period for a present-value comparison.
For financed ownership, model down payment and scheduled payments instead
of counting both the full financed principal upfront and loan payments.
APR/fees/term/total payments: _______________________________________
Lease or PPA escalation/transfer/end-of-term obligations: ___________
Low / central / high assumptions and results: ______________________

The simple example holds rates/output constant and excludes finance,
degradation, replacement, tax effects and time value of money. Fixed
utility charges remain. It does not predict a zero bill or project return.
As checked September 7, 2026, the IRS says the residential clean energy
credit is unavailable for property placed in service after Dec. 31, 2025.
Verify current local eligibility before counting any incentive.
https://www.irs.gov/credits-deductions/residential-clean-energy-credit
Production model: https://pvwatts.nlr.gov/
Unresolved questions and written answers: __________________________