Solar Battery for Home: Price, Lithium vs Tubular and How Long it Lasts

A solar battery stores power from your panels for use at night or during a power cut. Before you pick between lithium and tubular, or a 150 Ah and a 200 Ah battery, it is worth asking the question most sellers skip: does your home need a battery at all? This guide answers that with numbers, then covers solar battery price in India, lithium vs tubular, how long each one will run your home, and how to look after it.

Do you need a solar battery?

If you have an on-grid rooftop system with net metering, the grid already stores your daytime surplus for free and gives it back at night. A battery does the same job at a cost. Here is what every unit a solar battery stores really costs over its life:

Most homes pay ₹7 to ₹9 for a grid unit, so a battery used only to shift daytime solar into the evening barely breaks even with lithium and loses money with tubular. A solar battery earns its place in three situations:

• Regular power cuts of an hour or more. You are buying backup, not savings.
• Your state pays little for exports, for example under net billing at ₹2 to ₹3 a unit. Storing midday surplus then beats selling it.
• Time-of-day tariffs that make evening units much dearer than daytime ones. See how they work in smart meter reading.

A battery also needs a hybrid or off-grid inverter; an on-grid inverter cannot charge one. And the PM Surya Ghar subsidy covers panels only, never the battery. The three system types are compared in on-grid vs off-grid vs hybrid solar.

Solar battery price in India, October 2026

Per kWh stored, a 150 Ah tubular works out to about ₹10,000 and a 5 kWh lithium pack to ₹21,000 to ₹24,000. Lithium looks twice as expensive on the shelf but, as the table above shows, costs about half as much per unit over its life. Compare specific models on compare solar batteries.

Lithium vs tubular solar battery

Tubular lead-acid is the familiar tall battery sold with home inverters. It is cheap, easy to find and easy to service, but it needs distilled water every few months, should not be drained below about 20%, and loses capacity quickly in rooms above 40°C. Expect four to six years of daily solar use.

Lithium iron phosphate (LiFePO4) packs hold the same energy in a fraction of the space and weight, can use about 90% of their capacity every day, need no water and keep working in heat. A good pack lasts 10 years or more. The trade-off is upfront cost and the need for an inverter set up for lithium charging.

Solar battery vs normal inverter battery: C10 vs C20

Batteries sold for solar are usually rated at C10: their capacity is measured when drained over 10 hours. Regular inverter batteries are often rated at C20, over 20 hours, which makes the same Ah number look bigger. A C10 solar tubular battery also has thicker plates built for being charged and drained every day; Luminous rates its 200 Ah solar model at up to 1,500 cycles at 80% depth of discharge. A C20 inverter battery used daily on solar will usually wear out sooner. If you are buying for solar, check the label says C10.

How long will a solar battery run your home?

Battery size on the label is in Ah. To know what it runs, convert to kWh: volts × Ah ÷ 1,000. A 12 V, 150 Ah battery holds 1.8 kWh. Then take off what you cannot use and the inverter’s losses:

Run your own appliances through the battery backup calculator, and list what you want on backup with the home load calculator. Keep heavy loads such as ACs, geysers and irons off the backup circuit; a single 1.5 ton AC would empty a 5 kWh battery in about three hours.

Match the battery to your inverter

• 12 V: one battery, small solar UPS units up to about 1 kVA.
• 24 V: two 12 V batteries in series, 2 to 3 kVA solar UPS and small hybrids.
• 48 V: four 12 V batteries or one lithium pack, most 3 to 10 kW hybrid inverters.

Never mix old and new batteries, or different capacities, in one bank: the weakest one drags the rest down. Check your inverter’s battery voltage and lithium support before buying; the details are in our solar inverter guide.

Looking after a solar battery

• Keep it in a shaded, ventilated spot, never on the roof or in a hot store room.
• Top up tubular batteries with distilled water only, usually every two to three months in summer.
• Leave space around lead-acid batteries; they give off hydrogen while charging.
• Do not let tubular batteries sit drained; recharge the same day.
• For lithium, use the BMS settings the maker specifies and keep its app or display working.
• Note the install date and warranty terms; most claims need the invoice.

Solar panel with battery: small kits under ₹5,000

Kits under about ₹5,000 usually pair a 20 to 50 W panel with a small battery and LED lights. A 40 W panel makes roughly 150 to 200 Wh on a sunny day, enough for a few LED bulbs and phone charging through the evening. It will not run a ceiling fan through the night or anything with a motor for long. For a whole home, look at a proper system sized with the solar calculator.

Which solar battery should you buy?

• On-grid with net metering, few cuts: no battery.
• Short cuts now and then: one or two 150 to 200 Ah C10 tubular batteries.
• Daily cuts or daily solar cycling: lithium, sized for your backup hours.
• Low export rate or ToD tariff: lithium sized to your evening use.

Frequently asked questions