SolarSavings
This guide to Kerala Electricity Tariffs & Solar Payback starts with your current bill. It covers the 2026 slabs set by the KSERC and what each slab means for sizing your system.
Kerala electricity tariffs decide your solar payback more than panel prices do. Higher slabs mean faster ROI. Here are the current slabs and what each means for sizing your system.
1. KSEB Residential Tariffs (LT-I): Kerala Electricity Tariffs & Solar Payback
KSEB is the primary state-owned DISCOM servicing the vast majority of Kerala (excluding parts of Thiruvananthapuram). If your monthly consumption crosses the 300-unit threshold, your effective per-unit cost skyrockets, making you the ideal candidate for the PM Surya Ghar subsidy.
| Monthly Consumption | Energy Charge (₹/kWh) | Structure |
|---|---|---|
| 0 - 50 units | ₹3.35 | Telescopic |
| 51 - 100 units | ₹4.25 | Telescopic |
| 101 - 150 units | ₹5.35 | Telescopic |
| 151 - 200 units | ₹7.20 | Telescopic |
| 201 - 250 units | ₹8.50 | Telescopic |
| 0 - 300 units | ₹6.75 | Non-telescopic |
| 0 - 350 units | ₹7.60 | Non-telescopic |
| 0 - 400 units | ₹7.95 | Non-telescopic |
| 0 - 500 units | ₹8.25 | Non-telescopic |
| Above 500 units | ₹9.20 | Non-telescopic |
Source: KSEB tariff proposal 2026-27. Kerala uses a telescopic tariff, higher consumption pushes your per-unit rate up across slabs, so solar cuts both units and rates.
2. Thiruvananthapuram's Single-DISCOM Reality (KSEB)
Unlike Mumbai, where households choose between AEML, Tata Power, and BEST, Thiruvananthapuram has no competing private DISCOMs. KSEB is the distribution licensee for the city and almost all of Kerala. A handful of tiny licensees (such as Technopark and the Kannan Devan Hills plantations) serve special zones only, not residential neighbourhoods. Your tariff is the KSEB tariff in section 1, and your net-metering application goes to KSEB alone. There is no private alternative to compare against.
3. The "Solar Offset" Advantage in Kerala
When you install a PM Surya Ghar subsidised solar plant, you don't just generate electricity; you systematically knock out your most expensive tariff slabs. This is called the tiered offset effect.
Example: the 3kW impact. If you consume 600 units a month, you fall in the non-telescopic "above 500" bracket at ₹9.20/kWh. A standard 3kW solar system generates approximately 360 units a month. Under net metering, these 360 units are deducted from your gross consumption, bringing you down to 240 units, back inside the telescopic zone where the top slab is ₹8.50/kWh. Your solar generation eliminates your exposure to the highest bracket entirely, so your savings fall faster than your consumption.
4. Time-of-Day (ToD) Tariffs for Commercial Entities
If you are a commercial (LT-II) or industrial (HT-I) consumer in Kerala, KSERC enforces Time-of-Day tariffs. You are charged a premium (up to ₹1.50 extra per unit) during peak morning (0900-1200 hrs) and evening (1800-2200 hrs) slots. Since solar generation peaks precisely during the morning high-tariff window, a captive commercial solar plant serves as an instant hedge against peak ToD penalties.