Naxion Energy builds sodium-ion storage systems that aim to replace lead-acid inverters and diesel generators

Most Indian homes and small businesses that need backup power use a lead-acid inverter battery.

It is cheap, heavy, needs water topped up, corrodes, and only lasts a few years.

Larger sites use a diesel generator, which is expensive to run and noisy enough that nobody wants it nearby.

Lithium is the obvious replacement but brings its own problems: the raw materials are imported, the price is set abroad, and the fire risk means installing a large lithium pack inside a building involves rules that a lead-acid battery does not attract.

is selling sodium as the answer.