No, they're not. It depends on what battery you pick, and if you go with a deep cycle battery designed for that sort of storage use, you typically get charts o

No, they're not. It depends on what battery you pick, and if you go with a deep cycle battery designed for that sort of storage use, you typically get charts of cycle life down to 80% DoD or so, and still have "hundreds of cycles" there on anything competent. With thousands of cycles for shallower cycling that you'd see on a daily basis. Please go find a good, modern lead acid datasheet and familiarize yourself with it, because I'm tired of people who've clearly not been around anything from the last decade or two parroting this line endlessly when it comes to lithium and lead. Here's the datasheet for a GC2 form factor Trojan T105-RE from about a decade ago (I've got a 6 year old pack in my office): https://www.trojanbattery.com/pdf/datasheets/T105RE_TrojanRE_Data_Sheets.pdf https://www.trojanbattery.com/pdf/datasheets/T105RE_TrojanRE... Notice that it's rated for about 700 cycles, to 100% DoD. And about 4000 cycles at 20% DoD. Lead has many advantages for stationary storage, and they're not the same batteries you found 40 years ago.