What a lifetime EV battery warranty in India actually covers

Every EV showroom in India now has a line about a lifetime battery warranty on the wall. It is the single biggest thing holding back buyers, so the brands went after it. The word means less than it sounds like.

The short answer: 15 years, first owner, and a 70 per cent floor

On Tata's Harrier.ev, Curvv.ev and Nexon.ev 45 kWh, lifetime is defined as 15 years from the date of first registration at your RTO, with unlimited kilometres. The claim does not trigger because your range dropped. It triggers only when the pack's state of health falls below 70 per cent of its nominal energy capacity. Below that, Tata repairs or replaces the pack and restores capacity to either the pre-repair steady state figure or 80 per cent state of health, whichever is higher. Gradual energy loss above that line is treated as normal and is not covered.

So if your car was certified at 500 km and the pack is sitting at 75 per cent after eight years, you have lost real range, and you have no claim. That is not a loophole, it is how every capacity warranty in the world is written. It is just not what most buyers think they are getting.

Mahindra's wording on the BE 6 and the XEV 9e is similar in shape. The lifetime high voltage battery warranty covers both the 59 kWh and 79 kWh LFP packs, but only for the first registered owner on a private registration. The moment the car changes hands, cover becomes 10 years or 2,00,000 km, whichever comes first, counted from the first ever date of delivery. JSW MG does the same on the Windsor, with the lifetime cover attached to the first owner.

What voids it

Tata's terms rule out commercial use, so taxis, fleet cars, demo units and test drive cars are out. Cars registered to a company, firm or trust are excluded, with a carve out for employees who hold the car under a company perk scheme, and even that falls away if the car moves to anyone other than that employee. Servicing has to stay at authorised workshops on the recommended schedule, and the pack must be free of physical damage or tampering. Tata's cover can follow a second owner, but only if the company is told about the transfer. If nobody informs them, it is gone.

This matters more in India than in most markets because a large share of EV volume is fleet and taxi registrations. If you are buying a used electric car, the lifetime badge on the brochure almost certainly does not apply to you. Ask for the registration category and the service history, then work out which number you actually have left.

If the battery is not yours, the question changes

Maruti Suzuki's e VITARA is sold with a Battery as a Service option, at an introductory ₹10.99 lakh plus a battery charge of ₹3.99 per km. The battery warranty is 8 years or 1,60,000 km, whichever is earlier, on the 61 kWh and 49 kWh packs. The vehicle itself gets a standard 3 year warranty, extendable to 8 years on payment. MG's Windsor BaaS launched the same way, at ₹9.99 lakh plus ₹3.50 per km for the battery.

Under BaaS you are renting the most expensive part of the car, so degradation is the lessor's problem, not yours. Read what happens at the end of the term and what the buyback is worth. MG quoted an assured 60 per cent buyback after 3 years or 45,000 km on the Windsor. Maruti quotes 60 per cent at 3 years or 45,000 km, and 50 per cent at 4 years or 60,000 km.

What to check before you sign

Get the warranty policy document, not the brochure. Look for four things: the state of health threshold, what the pack is restored to after a claim, the exact transfer terms, and whether your registration category qualifies. In Bengaluru, where a lot of these cars go out on commercial plates for app fleets, that last one decides everything.

Sources