Quality solar panels come from a handful of tier-1 manufacturers with proven track records: Canadian Solar, Enphase, Pan...
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Frequently Asked Questions
How do I choose between solar panel brands?
Compare: efficiency rating (20-22% is excellent), warranty (25-year standard), degradation rate (< 0.5%/year), temperature coefficient (lower is better for hot climates), and installer familiarity. Tier-1 brands from Bloomberg's ranking are safest long-term.
What is the difference between monocrystalline and polycrystalline panels?
Monocrystalline: higher efficiency (20-22%), sleeker black appearance, higher cost. Polycrystalline: lower efficiency (18-20%), bluer appearance, lower cost. For most US installations, monocrystalline is now standard due to cost parity.
How often do solar panels need maintenance?
Minimal — most degradation happens in year 1-2. Clean panels 1-2x/year (rain often sufficient). Inverters last 10-15 years and may need replacement. Monitoring systems track performance and flag issues.
What warranties come with residential solar?
Product warranty: 10-12 years (covers defects). Performance warranty: 25-30 years (guarantees 80-90% output after 25 years). Labor warranty: 5-10 years (covers install issues). Compare warranties, not just price.
Are there differences between solar panels for different climates?
Yes — temperature coefficient matters in hot climates (CA, AZ, FL): lower is better since heat reduces efficiency. In cold climates, high-efficiency panels maximize output on shorter winter days. Humidity and salt-air corrosion favor sealed-edge designs for coastal areas.