I meant "crazy cheap" as lithium-based product, i.e. compared to other lithium chemistry storages. Sure, lead-acid technology still offers better capacity/price

I meant "crazy cheap" as lithium-based product, i.e. compared to other lithium chemistry storages. Sure, lead-acid technology still offers better capacity/price ratio, but lithium chemistry has many advantages especially when used as domestic energy buffer for sun: longer lifespan (more cycles) in daily use, more peak power, wall mountable / lighter, etc.