Frequently Asked Questions
How do solar panels work?
Solar panels convert sunlight into electricity using photovoltaic (PV) cells that create an electric current through the photovoltaic effect. The DC electricity is converted to AC power by an inverter for home use.
Do panels work on cloudy days or at night?
They work at reduced capacity (10-25%) on cloudy days but don't generate power at night. Battery storage or grid connection provides nighttime power.
How long do solar panels last?
Most panels have 25-30 year lifespans with 0.5-1% annual efficiency degradation. 25-year warranties are common.
What's the average cost?
$15,000-$25,000 for a 6-8 kW system before incentives.
What incentives are available?
- 30% Federal Tax Credit (2022-2032)
- State/local rebates
- Net metering credits
Financing options?
Solar loans, leases/PPAs, or home equity loans.
Installation timeline?
1-3 days installation plus 2-6 weeks for permits/approvals.
Roof replacement needed?
Recommended if roof is older than 10-15 years.
Maintenance requirements?
1-2 cleanings yearly, shade management, and performance monitoring.
Annual savings?
$1,000-$2,500 depending on location and usage.
Payback period?
Average 6-12 years.
Home value impact?
~4% increase in home value.
How many panels needed?
15-24 panels for 6 kW system (based on 250-400W panels).
Efficiency factors?
- South-facing orientation (US)
- Shade avoidance
- Optimal tilt angle
Going off-grid?
Requires large system + batteries + backup generator.
CO2 reduction?
3-4 tons annually (equivalent to 100+ trees).
Recyclable?
Yes - 95% materials recyclable via manufacturer programs.
Power outages?
Need batteries for backup power during outages.
Roof damage?
Proper installation protects roofs with waterproof mounts.
Fire risk?
Extremely low (0.006% of installations).
How to choose?
- Check NABCEP certification
- Compare multiple quotes
- Review warranties
Required permits?
Installers typically handle building/electrical permits.
Myth: Doesn't work in cold climates
Fact: Performs better in cool temps
Myth: Too expensive
Fact: $0-down options available
- Review energy bills
- Use Project Sunroof assessment
- Compare installer quotes