Module 3 of 10
Sizing an on-grid system
From the electricity bill to the right kWp: yield, losses, sanctioned load and what net metering allows.
- 5lessons
- 52minutes
- 2,242questions in the bank
Lessons
Reading the electricity bill: units, sanctioned load, slabs
Read an Indian electricity bill like a designer: units, sanctioned load, phase, tariff slabs, fixed charges and duty, and what each means for solar.
10 min readFrom units to kWp: specific yield and performance ratio
Turn a customer's yearly units into system size with specific yield, check it with performance ratio, and round to whole modules sensibly.
10 min read, with a live calculatorLosses: temperature, soiling, mismatch, wiring, inverter, degradation
Where a rooftop system loses energy between sunlight and meter, typical Indian values for each loss, and which ones an installer can control.
10 min readLimits: sanctioned load, net-metering caps, roof area and budget
The four limits that cap a rooftop system: consumption, sanctioned load and net-metering rules, roof area and budget. Check all, take the smallest.
10 min readWorked examples: 2, 3, 5 and 10 kW homes and a small shop
Five complete sizing examples from Indore, Pune, Jaipur, Lucknow and Ahmedabad: units to kWp, modules, inverter, limits, generation and net cost.
12 min read, with a live calculator