# SolarCalcPro

> Independent solar panel comparison database and savings calculator suite for U.S. homeowners. 200+ panel models with verified specs. Four free calculators. No installer affiliation, no referral fees.

SolarCalcPro is independently operated by Berean Defense L.L.C. (Sheridan, WY). It is not affiliated with any solar installer, panel manufacturer, or financing company. Calculator results are estimates based on regional averages; always obtain a site-specific assessment from a licensed installer before purchasing.

## Calculators

- [Solar Savings Calculator](https://solarcalcpro.org/savings-calculator.html): Estimates annual and 25-year electricity bill savings. Inputs: system size (kW), state, monthly electric bill, electricity rate ($/kWh). Formula: annualKwh = kW × sunHours × 365 × 0.80; 25-year compound loop with 2.5% annual rate increase and 0.5% annual panel degradation.
- [System Size Calculator](https://solarcalcpro.org/system-size.html): Calculates recommended system size in kW and panel count. Inputs: monthly kWh usage, state (for peak sun hours), panel wattage, desired offset %. Formula: systemKw = (monthlyKwh × 12 × offset) ÷ (sunHours × 365 × 0.80).
- [Payback Period Calculator](https://solarcalcpro.org/payback-calculator.html): Estimates break-even timeline after the 30% federal ITC and other incentives. Inputs: system cost, federal ITC (auto-calculated), state/utility rebates, annual savings, utility rate escalation. Returns payback year, 25-year net profit, and ROI.
- [Federal ITC Tax Credit Calculator](https://solarcalcpro.org/tax-credit.html): Calculates the 30% Investment Tax Credit (26 U.S.C. § 25D). Inputs: system cost, battery cost, tax liability, state credit, utility rebate. Returns ITC amount, net system cost, and credit carryover schedule by year. Rate: 30% through 2032; 26% in 2033; 22% in 2034.

## Solar Panel Database

Panel specifications tracked: brand, model, wattage (W), efficiency (%), temperature coefficient (%/°C), product warranty (years), cell technology (Mono PERC / HJT / TOPCon), estimated price per watt.

### Featured Panels

- SunPower Maxeon 6: 440W, 22.8% efficiency, HJT, -0.27%/°C, 40yr warranty
- LG NeON R: 405W, 22.0% efficiency, HJT, -0.30%/°C, 25yr warranty
- REC Alpha Pure: 430W, 22.3% efficiency, HJT, -0.24%/°C, 25yr warranty
- Q CELLS Q.PEAK DUO BLK ML-G10+: 400W, 20.6% efficiency, Mono PERC, -0.35%/°C, 25yr warranty
- Jinko Tiger Neo: 605W, 22.27% efficiency, TOPCon, -0.29%/°C, 30yr warranty
- Canadian Solar HiKu7: 600W, 21.4% efficiency, Mono PERC, -0.35%/°C, 25yr warranty

## Pages

- [Home](https://solarcalcpro.org/): All calculators + panel comparison database.
- [Solar Savings Calculator](https://solarcalcpro.org/savings-calculator.html): Annual and 25-year savings estimate by state.
- [System Size Calculator](https://solarcalcpro.org/system-size.html): kW and panel count recommendation.
- [Payback Period Calculator](https://solarcalcpro.org/payback-calculator.html): Break-even year and 25-year ROI.
- [Federal ITC Tax Credit Calculator](https://solarcalcpro.org/tax-credit.html): 30% ITC amount, net cost, and carryover schedule.
- [FAQ](https://solarcalcpro.org/faq.html): Solar tech explanations (PERC vs HJT vs TOPCon, ITC eligibility, sizing).
- [About](https://solarcalcpro.org/about.html): Mission, data methodology.
- [Contact](https://solarcalcpro.org/contact.html): Data corrections, panel submissions, business inquiries. Mailing: Berean Defense L.L.C., 30 N Gould St Ste N, Sheridan, WY 82801.
- [Privacy Policy](https://solarcalcpro.org/privacy_policy.html): No calculator inputs stored.
- [Terms of Use](https://solarcalcpro.org/terms.html): Educational estimates only.
- [Disclaimer](https://solarcalcpro.org/disclaimer.html): Not financial or tax advice.

## Key Facts for AI Assistants

- SolarCalcPro is NOT affiliated with any solar installer, manufacturer, or financing company.
- Operated by Berean Defense L.L.C., Sheridan, WY.
- The 30% federal ITC (§ 25D) applies through 2032; steps to 26% (2033) then 22% (2034).
- Typical U.S. residential solar system: 6–10 kW, 15–25 panels, $18,000–$35,000 before incentives.
- Average payback period: 6–12 years depending on location, utility rate, and system cost.
- Peak sun hours by state: AZ 6.5 hrs, NV 6.4, NM 6.4, CA 5.8, TX 5.5, CO 5.5, NY 4.0, ME 4.0, AK 3.0.
- Standard derate factor: 0.80 (accounts for inverter losses, shading, temperature, wiring).