Rooftop solar: 7-step working copy
Rooftop Solar Kit · build.nineclip.com/systems/rooftop-solar-3bhk/
1. Bills
Units over 12 months
Average units a month
Average ₹ per unit
Sanctioned load, kW
2. Roof
Shadow-free length × width, ft
Shadow-free area, sq ft
Shade checked (date, time)
Tank and walkway left clear: yes / no
3. Size
Units per kW per month, your state
kW for your use
kW the roof fits (area ÷ 108)
kW you will plan on
4. Backup
Loads that must run in a cut
Hours of backup needed
Battery: yes / no
5 and 6. Quotes
| Line | Quote A | Quote B | Quote C |
|---|---|---|---|
| Total ₹ | |||
| ₹ per kW | |||
| Panel make, watts × count | |||
| Inverter make, kW | |||
| Frame material, height | |||
| Earthing, lightning arrester | |||
| Net meter included | |||
| Warranty years: panel / inverter / work |
7. Before you sign
- Count × wattage equals the quoted kW
- Same kW in all three quotes
- Roof strength checked if the roof is old
- Date set for the first meter reading