Direction
| Orientation | Approx. annual output vs south |
|---|---|
| South | 100% |
| South-east / south-west | ~95–98% |
| East or west (single) | ~85–90% |
| East–west split | ~88–95% |
| North-facing tilt | Avoid |
Tilt
A tilt close to Indore's latitude (about 20–23°) maximises annual output; 10–15° is common for elevated structures to reduce wind load with only a small loss. Flat (0°) modules collect dust and lose several percent — always give some tilt.
Finding shade
Walk your roof at 9 am, noon and 4 pm, ideally in December when shadows are longest. Note shadows from:
- Water tanks and stair headroom (mumty)
- Parapet walls, especially on the south side
- Trees, poles, dish antennas
- Taller neighbouring buildings to the south, east or west
A rule of thumb: an obstacle casts a winter shadow roughly 1.5–2 times its height to the north around mid-morning and mid-afternoon in Indore.
Fixing shade
- Move the array to the unshaded part of the roof.
- Raise it above the obstacle with an elevated structure — often the cleanest fix.
- Split strings across two MPPT inputs so a shaded string doesn't drag down the other.
- Trim trees where you're allowed to.
Use our roof suitability check for a quick verdict, then book a free survey for a proper shadow study.