Water heating is one of the biggest contributors to winter electricity bills in India. A standard 25-litre electric geyser can consume up to 2-3 units of power every single day for a family of four. Over a year, that translates to thousands of rupees.

Switching to a rooftop solar water heater seems obvious, given India gets 250 to 300 sunny days a year. But the upfront cost can be intimidating. Let’s break down the real numbers.

Initial Investment

Electric Geysers: Are cheap to buy. A good quality 25L storage geyser costs between ₹6,000 and ₹15,000. Installation is minimal.

Solar Water Heaters: A standard 100 LPD (Litres Per Day) system costs between ₹25,000 and ₹40,000, depending on whether you choose ETC (Evacuated Tube Collector) or FPC (Flat Plate Collector) technology. Installation requires roof space and plumbing adjustments.

Long-Term Savings

An electric geyser will add approximately ₹1,000 to ₹1,500 to your monthly bill during peak usage months. A solar heater brings this running cost down to zero.

Most Indian households find that a solar water heater pays for its initial premium within 2 to 3 years. After that, you get free hot water for the next 15 years (the average lifespan of a solar heater, compared to just 7-10 years for an electric geyser).

Who Should Choose What?

If you live in an independent house or a top-floor apartment with roof access, solar is the undisputed winner. If you live in a multi-story apartment building with no roof access, look into energy-efficient 5-star rated electric geysers instead.