In Monrovia, the average installed cost is $3. A typical 6kW system runs $13,800 – $41,500 before incentives, dropping to approximately $14,490 after the 30% federal tax credit. Solar panel installation and repair costs in Monrovia vary widely based on your home's setup and energy goals. In sunny Los Angeles County, high demand and incentives influence pricing. Get informed to secure the best value from local pros. ✓ No obligation estimate • ✓ Compare local rates • ✓. We analyzed LADWP / Southern California Edison rate books, NREL irradiance data, and California tax codes to calculate the real ROI for homeowners in 91016. However, the average electric bill in. You'll pay an average of $20,088 to install a 8 kilowatt (kW) solar panel system in Monrovia, CA before any available incentives. Buying in bulk by pallet or container lets you lock in better prices per watt, simplify logistics, and get equipment from trusted brands in one. Some states, towns, and utility companies offer incentives that can help lower the cost of solar.