Best Time of Year to Clean Solar Panels in LA & Orange County
Quick Answer: Clean in April (after pollen), July/August (peak production season), October (post-wildfire season), and December (before winter). High-pollution areas need all 4; moderate areas need 2-3.
Why Timing Matters in Southern California
Southern California's unique climate creates seasonal challenges for solar panel efficiency. Understanding the annual pollution and weather cycles helps you maximize energy production year-round.
Spring (March-May): Pollen Season
Challenge: Tree pollen coats panels with sticky residue
Best Cleaning Time: Late April or early May (after blooms finish)
Why It Matters: Prepares panels for peak summer production
Summer (June-August): Peak Production + Dust Season
Challenge: Santa Ana winds carry desert dust; maximum sunlight hours
Best Cleaning Time: July or August (mid-summer boost)
Why It Matters: Summer produces 40% of your annual energy—don't waste it on dirty panels
Fall (September-November): Wildfire Season
Challenge: Wildfire ash and smoke residue
Best Cleaning Time: October (after fire season peaks) or immediately after fires in your area
Why It Matters: Ash can reduce efficiency by 50-60% and etch panels if left too long
Winter (December-February): Rain & Hard Water
Challenge: Light rain creates muddy streaks and hard water deposits
Best Cleaning Time: December (before winter rains)
Why It Matters: Clean panels before rain season prevents mineral buildup
Recommended Annual Schedule
For High-Pollution Areas (Downey, LA, Inland Empire):
✅ April: Post-pollen cleaning
✅ July: Mid-summer boost
✅ October: Post-wildfire cleaning
✅ December: Pre-winter cleaning
For Moderate Areas (Orange County, Suburbs):
✅ April: Spring cleaning
✅ August: Summer cleaning
✅ October: Fall cleaning (if wildfires occurred)
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