Solar Quote Comparison
Compare Solar Quotes in Fresno, CA — Side-by-Side Proposal Review
Not all solar proposals are equal. System size, equipment quality, warranty terms, and price per watt vary significantly between installers. Robbins Energy helps you compare proposals so you can make an informed decision.
Solar Proposal Comparison Checklist
Use this checklist when comparing any two solar proposals.
System size in kW — Is each proposal sized for the same annual production target?
Price per watt — Divide total cost by system size (kW) for an apples-to-apples comparison.
Panel manufacturer and efficiency — Higher efficiency panels produce more per square foot.
Inverter type — Microinverters, string inverters, and power optimizers have different performance profiles.
Battery storage — Is battery included? What is the usable capacity and backup duration?
Panel warranty — Most quality panels carry a 25-year product and performance warranty.
Inverter warranty — Enphase and SolarEdge carry 25-year warranties. String inverters are typically 10–12 years.
Workmanship warranty — Varies by installer. Ask what is covered and for how long.
Production monitoring — How will you track system performance after installation?
Financing terms — Compare APR, loan term, and total cost of ownership for financed proposals.
Inverter Technology Comparison
Microinverters (Enphase)
One per panel. Best for shading, complex roofs. 25-year warranty. Higher upfront cost.
Power Optimizers (SolarEdge)
Optimizer per panel, one central inverter. Panel-level monitoring. Good shading performance. 25-year optimizer warranty.
String Inverters (SMA, Fronius)
One inverter for the whole string. Lower cost. Best for simple, unshaded roofs. 10–12 year warranty typical.
Battery Storage Comparison
Tesla Powerwall 3
13.5 kWh usable. 10-year warranty. Integrated inverter. Whole-home backup capable.
Enphase IQ Battery 5P
5 kWh per unit, stackable. 15-year warranty. Pairs with Enphase microinverters.
FranklinWH aPower
13.6 kWh usable. 10-year warranty. Compatible with multiple inverter brands.
NEM 3.0 Considerations
NEM 3.0 and Export Rates
California's NEM 3.0 significantly reduced export compensation rates. New solar installations should be sized for self-consumption rather than maximum export. We review whether your proposal accounts for current export rates.
Battery Storage Under NEM 3.0
Under NEM 3.0, battery storage improves economics by shifting self-consumption to evening hours when grid rates are highest. We evaluate whether battery pairing is appropriate for your usage profile.
Annual True-Up and Billing
Your annual true-up bill reflects the net difference between energy consumed from the grid and energy exported. We review whether the production estimate in your proposal aligns with your actual usage patterns.
Serving Central California
Ready to Compare Your Solar Quotes?
Bring us your proposals. We will walk through the comparison with you — no charge, no obligation.