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Annual savings (estimate) Bill savings
₹16607.0 218%
Annual savings (estimate) ₹16607.0
Get full estimate Plan your solar | Price & savings
Bill savings 218%
Based on: 15 kWh/day usage · 4 kW solar · 5 kWh battery · typical tariffs

Solar & Battery Savings in Kerala, India Get quotes from local installers

Design solar and battery systems for Kerala using Photonik's professional design platform. Kerala has been proactive in promoting rooftop solar, with state-backed programmes and net metering driving adoption. Despite its tropical rainfall, the state receives plenty of sunshine for strong solar generation, making it a viable and increasingly popular option for homeowners.

Solar Energy Savings in Kerala

How Solar Reduces Your Electricity Bills

The calculations below show how your electricity bills change with solar.

What drives your savings in Kerala

Kerala’s heavy monsoon season and coastal humidity reduce solar irradiance to 4.5–5 kWh/m²/day — lower than drier inland states — with significant generation dips from June to September. Residential tariffs are moderate at ₹4–7/unit, and the state has waived application fees under PM Surya Ghar to encourage adoption. A draft proposal to restrict residential net metering to systems of 3 kW or less may limit future system sizes. Despite lower generation, year-round warmth and relatively high electricity consumption for cooling still make solar economically viable for most households.

Your usage & system size Kerala

Energy usage & tariffs

Energy bills in Kerala add up quickly — with 8 kWh of daily consumption, solar can make a real difference to your monthly costs. With electricity prices trending upward, even small reductions in your 8 kWh daily consumption can noticeably lower your bills — and solar takes this further by offsetting much of what you do use.

Lowering energy usage before solar installation — via improved insulation and efficient appliances — often reduces required system size and enhances financial returns.

5 kWh 100 kWh
₹ /kWh
₹ /kWh
%

lightbulb Note: These are simplified estimates. For detailed tariff inputs and advanced calculations, use the full Photonik app.

Representative flat export rate (feed-in tariff). What you earn per kWh of surplus solar exported to the grid. Your actual rate depends on your provider, plan, and time of day.

See how export rates work →

Estimated at 75% of the retail grid rate. A battery lets you store daytime solar and export during expensive peak hours, so each exported kWh is typically worth more than a flat feed-in tariff. Real returns depend on your time-of-use tariff and battery efficiency.

See how export rates work →

Solar system size

Based on 8 kWh daily usage, a 2.1kW system is a good starting point for Kerala — though many homeowners choose to install slightly more. Optimal sizing ranges from 3.2kW to 4.2kW to accommodate daily and seasonal generation variations.

In Kerala, a 3.2 kW installation produces around 14.8 kWh per day on average, though output ranges from 4.29 kWh/kW/day during December to 4.94 kWh/kW/day in September.

1 kW 20 kW

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A 4 kW system in Kerala can generate approximately 6731.0 kWh annually based on local sun conditions.

Battery storage

Without battery storage, a 3.2 kW system in Kerala achieves approximately 50% energy self-sufficiency, with the remaining 50% supplied by the grid. Installing a 10 kWh battery boosts your energy independence to around 99% per year, cutting grid dependency down to 1%.

For accurate battery savings and ROI calculations, use the full Photonik design tool.

0 kWh 30 kWh

lightbulb A 0kWh battery will make you about 0% self sufficient.

The sweet spot for most households is 5 – 13 kWh — larger batteries add independence but with diminishing payback, especially where feed-in tariffs are low.

System Pricing & Payback for Kerala

Use the full Photonik solar planning and design platform to model a complete system for your home — including detailed costs, equipment options, and financial returns.

Try Photonik Solar Design

For a quick price guide, see the India solar calculator.