The apples to apples comparison of capacity kWh is misleading. The cheaper lead acid should not be discharged below 50% regularly, cutting the useful kWh in hal

The apples to apples comparison of capacity kWh is misleading. The cheaper lead acid should not be discharged below 50% regularly, cutting the useful kWh in half for regular use. When I did the math for my RV on Lifepo4 vs lead acid, the cost per usable kWh was higher unless you looked at the expected lifetime replacement costs, then it was even. I haven't followed battery prices too closely but my impression is that Lifepo4 has dropped in price ~30-50% since then so is probably now cheaper for usable kWh×cycle than lead acid but still might have a higher upfront cost. The supported tempurature ranges, space contraints (venting, size, weight) and other factors all seem to favor Lifepo4. That said, if your house battery is a backup for power outages and not intended to power your house every night, then lead acid may still be the way to go because you don't care about kWh not kWh×cycle. Edit: replaced * with × to fix formatting