So burning wood is about 4kWh/Kg Batteries top out at about 3kWh/kg So strictly speaking you're better off just burning the wood, although there are inefficie

So burning wood is about 4kWh/Kg Batteries top out at about 3kWh/kg So strictly speaking you're better off just burning the wood, although there are inefficiencies turning the wood to electricity so if that's what you want the wood battery is probably better. Cost wise, the cost of a sapling plus axe is less than batteries plus solar panel. But if you want electricity you'd need a generator plus steam engine / wood gasifier, which bring them to around about par.