Load Shedding in Nepal 2026:
How to Choose the Right Inverter Battery

Nepal's power situation in 2026 has shifted from the optimism of 2023's surplus exports back to managed shortfalls. Dry-season hydropower generation dips significantly from Magh through Jestha, and the Nepal Electricity Authority has reintroduced scheduled cuts for industrial consumers. For homes and small businesses, the result is irregular supply — and renewed demand for reliable inverter battery backup.

Choosing an inverter battery incorrectly is expensive. Too small a capacity, and you run out of power in the first hour of a cut. The wrong battery chemistry, and you need replacement within two years instead of five. This guide cuts through the confusion.

Step 1: Calculate how much power you actually need

Before buying any battery, add up the watt rating of every device you want to run during a power cut, and estimate how many hours you need them to run:

• LED lights: 7–10W each
• Ceiling fan: 50–75W
• Small TV: 80–150W
• Laptop charger: 45–65W
• WiFi router: 10–15W
• Refrigerator: 100–200W (but runs in cycles — count as 50% duty)

Example: 4 LED lights (40W) + 2 fans (120W) + 1 TV (100W) + 1 router (12W) = 272W total load. To run this for 4 hours: 272W × 4h = 1,088 Wh needed.

A 150Ah battery at 12V stores 1,800 Wh. At 50% depth of discharge (to protect battery life), that gives 900 Wh usable — enough for this load for about 3.3 hours.

Step 2: Choose the right battery type

Type	Best for	Lifespan	Maintenance
Tubular Flooded	Homes, frequent long cuts	5–7 years	Monthly water top-up
VRLA / Sealed	Offices, less frequent cuts	3–5 years	Maintenance-free
Flat Plate	Light backup only	2–4 years	Low maintenance

For most homes in Eastern Nepal experiencing 2–6 hour daily cuts: a tubular flooded battery is the correct choice. It costs more upfront but delivers the deepest discharge capacity and longest lifespan.

Step 3: Match battery capacity to your inverter

Your battery must be compatible with your inverter's capacity rating. Key rules:

• A 600VA inverter can support 1–2 batteries of 100–150Ah each
• A 1,000VA inverter supports 2–4 batteries of 150–200Ah each
• Never exceed the inverter manufacturer's maximum recommended Ah
• Mismatched combinations cause the charger to either undercharge (reducing life) or overcharge (destroying plates)

What Kulayan offers for home and business backup

Kulayan manufactures inverter batteries at our Khanar-6, Sunsari facility across multiple capacity variants:

• INVA series: 150Ah and 200Ah tubular flooded — designed for Nepal's high-cut-frequency environments and deep daily discharge
• XTRA series: 180Ah high-capacity tubular — for heavy loads or extended backup requirements
• POWER series: 140Ah and 160Ah — mid-range capacity for standard household use

All Kulayan inverter batteries carry a 3-year warranty serviced through 50+ dealers across Nepal — no need to ship to Kathmandu.

Common mistakes to avoid

• Buying based on price alone: The cheapest battery often uses thinner plates that fail within 18 months under daily deep discharge. Calculate cost-per-year, not purchase price.
• Ignoring battery age: Always check the manufacturing date on the battery. A battery sitting in a warehouse for 8 months has already lost some capacity through self-discharge and sulfation.
• Mixing old and new batteries in a bank: A weak battery in a multi-battery bank drags down every other battery. Replace entire banks together.
• Skipping water maintenance: A tubular battery with low electrolyte levels will damage its plates within weeks — an irreversible failure mode.