My company tried designing a unit that runs off a solar panel and battery. We initially designed around a lead acid battery. And as we kept accounting for thing

My company tried designing a unit that runs off a solar panel and battery. We initially designed around a lead acid battery. And as we kept accounting for things it just got larger and more expensive. We then switched to a lithium ion battery and it's literally a 1/3 the cost and a tenth the weight/size.