Fans + lights · shop · masjid · September 2026
Four fans are 300 watts. That is not a 6 kW hybrid, and it is not a toy 12 V kit either.
The cheapest honest solar in Pakistan: keep the air moving when the feeder dies. Size from fan count and night hours. Do not expect a fridge or an AC to join later without a redesign.
Load
A ceiling fan is ~75 W. Count them.
| Job | Running W | Day energy (12 h) | PV (645 W plates) | Night 8 h shed | Street band |
|---|---|---|---|---|---|
| 2 fans + 4 LEDs | ~200 | ~2.0 kWh | 2 plates | ~1.6 kWh → Knox 2.56 / 4.15 or 2× tubular | Day Rs 1.2–2.0 lakh · night Rs 2.0–3.2 lakh |
| 4 fans + lights (default) | ~350 | ~3.6 kWh | 2 plates (3 if dusty / north) | ~2.8 kWh → 1 × 5 kWh LFP or 4× 150–200 Ah tubular | Day Rs 1.5–2.5 lakh · night Rs 2.5–4.0 lakh |
| 6 fans + shop LEDs | ~550 | ~5.5 kWh | 3–4 plates | ~4.4 kWh → 1 × 5 kWh LFP | Rs 3.2–5.0 lakh with night |
| Masjid / waiting hall 10 fans | ~800 | ~8 kWh | 4–5 plates | ~6.4 kWh → 2 × 5 kWh LFP | Quote — treat as small house |
BLDC / DC fans at ~35 W each cut the bank almost in half. If you are building new, buy the fans first, then the solar. Old AC fans are fine — just count 75 W.
Two products people confuse
12 V DC kit vs a small hybrid.
12 / 24 V DC fans + 150–400 W plate
Rs 15–40k. Works if every fan is DC, the wire run is short, and you accept dim lights at dusk. No fridge. No existing AC fans. Fine for a chowkidar room or a stall. We will say so, and we will not call it a house system.
Existing 220 V fans + 1.2–3.6 kW hybrid
Keeps the fans you already have. 2–3 × 645 W N-type, 14 SWG iron, XLPO, small LFP if nights matter. Can add a fridge later by growing the bank — not by hanging it on a 12 V inverter.
Honest limits
Fan solar is a ceiling, not a seed.
No AC on this kit
A 1.5-ton is 1,200 W — four times four fans. Jump to single AC or a home hybrid. Do not “try” an AC on a 2 kW fan inverter.
Fridge is a maybe
A 12–18 cft fridge is ~150 W average but 600 W+ on start. It needs a hybrid with surge headroom and ~1 kWh extra battery. Ask before you plug it in.
Tubular is allowed here
Fans+lights is the one job where four tubular 200 Ah still makes 2026 sense if the horizon is 2–3 years. Daily AC cycling is what kills them — you are not doing that on this page.