A traditional wash uses ~50 litres per car. We tested ours: 2.8 L average. Here's the breakdown, and what it means for your building's water bill.
India's residential water tariff in Hyderabad is roughly ₹15 per kilolitre for the first slab, climbing to ₹60+/kL above 20 kL. Most apartments hit the higher slab in summer. Add tanker top-ups at ₹500–₹1,500 per delivery, and the cost of "extra water" starts mattering.
Where the 50 litres go in a conventional wash
- Pre-rinse: 10–15 L
- Foam rinse-off: 15–20 L
- Interior cleaner rinse: 5–10 L
- Wheels: 8–12 L
- Splash + spillage: 5–10 L
Where our 3 litres go
Our EV unit carries a 30-litre tank. A typical EcoRinse uses 2.5–3.5 L per car: a mist rinse, an eco-foam application, and a final ozone rinse. Microfibre drying replaces the second full rinse a traditional wash would do.
Multiplied across a 200-flat society: a weekly car wash schedule using 50 L/car/wk vs 3 L/car/wk = 9,400 L saved per society per week. That's nearly half a tanker.