Battery storage myth explained
It was just last year my dad called me a fool for storing my battery on the floor of the shop which is concrete.
He had told me that for years & I figured it wasn't really true as no one could explain why.
I found this on a website specializing in solar systems.
"The old myth about not storing batteries on concrete floors is just that - a myth. This old story has been around for 100 years, and originated back when battery cases were made up of wood and asphalt. The acid would leak from them, and form a slow-discharging circuit through the now acid-soaked and conductive floor."