Solar panels generate free electricity from sunlight, but you need to maintain them properly to get maximum output and ensure your PM Surya Ghar subsidy investment pays off quickly.
How Much Does a Solar Panel Generate?
On average, 1 kW of solar panels generates 100 – 120 units (kWh) per month in India. This varies by location: Rajasthan generates more (6+ peak hours), while northeast India generates less (4-4.5 peak hours).
Monthly Savings Calculation
Example: 2 kW system in Mumbai
- Monthly generation: 200 units
- Average electricity tariff: Rs 8/unit
- Monthly savings: Rs 1,600
- Annual savings: Rs 19,200
- Net cost after subsidy: Rs 80,000
- Payback period: 4.2 years
5 Essential Solar Panel Maintenance Tips
1. Clean Panels Monthly
Dust reduces efficiency by 15-25%. Clean with soft cloth and plain water. Avoid harsh chemicals. Early morning cleaning is best.
2. Check Inverter Display
Your inverter shows daily generation. If generation drops suddenly, there may be shading, dirt, or a technical issue. Monitor weekly.
3. Trim Overhanging Trees
Even partial shading can reduce output by 30-50%. Keep trees trimmed around your solar panels.
4. Annual Professional Inspection
Get a professional to check connections, inverter performance, and panel condition once a year. Most installers offer AMC (Annual Maintenance Contract).
5. Monitor via App
Most modern inverters come with smartphone apps. Monitor daily, weekly, and monthly generation. Compare with expected output based on sunshine.
Net Metering: Earn from Surplus Power
Under PM Surya Ghar net metering policy, surplus electricity exported to the grid earns credits on your electricity bill. In some months you may have zero electricity bill, or even get a credit rollover.
Calculate your potential savings with our Solar Subsidy and Savings Calculator.