> The batteries themselves typically last >5years in a car
In a home you will be using up a good chunk of the capacity every night. Lead acid batteries don't last many cycles[1], and I suspect you would be replacing them every 18 months if you powered your house off them.
Boats often have a solar+lead acid setup, and the owners of such systems typically have to make lifestyle changes to adapt around the limitations of the power system. Things like running only one appliance at a time, only starting the washing machine if the batteries are over 50%, never use any electric heaters, etc.
In a home you will be using up a good chunk of the capacity every night. Lead acid batteries don't last many cycles[1], and I suspect you would be replacing them every 18 months if you powered your house off them.
Boats often have a solar+lead acid setup, and the owners of such systems typically have to make lifestyle changes to adapt around the limitations of the power system. Things like running only one appliance at a time, only starting the washing machine if the batteries are over 50%, never use any electric heaters, etc.
[1]: https://batteryuniversity.com/article/bu-804-how-to-prolong-...