How often to clean by SD region
Coastal arrays need it more than inland. Backcountry needs it after dust storms. Here's the cadence.
What you'll learn
- Why coastal arrays under marine layer film need 2x/year minimum
- Why inland systems can usually go 12 months between cleanings
- Why backcountry homes need event-driven cleaning, not calendar-based
- What to ask about a maintenance plan
Step by step
- Coastal (Encinitas, Carlsbad, Del Mar, La Jolla, Coronado): every 6 months.
- Central (San Diego, Chula Vista, El Cajon, Poway): every 9–12 months.
- Inland / backcountry (Ramona, Alpine, Julian): annual + after dust events.
- After any wildfire ash event, regardless of region: within 2 weeks.
- Heavy bird activity: 3–4 month intervals plus bird proofing.
Safety note
Most SD homeowners under-clean. The math under NEM 3.0 is clear, production losses are worth more now than they were on NEM 2.0, so cleanings pay back faster.
Rather have a pro handle it?
Call and we will connect you with a local solar pro who covers your area.
More guides
Keep learning.
Basics · 4 min watch
Check your solar production data
The first step before booking a cleaning is confirming your panels are actually losing production.
Basics · 3 min watch
Do a 60-second visual check from the ground
You don't need to climb the roof. A pair of binoculars from the driveway tells you most of what you need to know.
Safety · 3 min watch
When NOT to rinse your panels with a hose
A hose rinse seems harmless. Done wrong, it bakes mineral deposits onto your glass permanently.