My last trip with lead acid was the Deka sealed 12 volt ones.
Didn’t get five years before almost every one was dropping one cell. New they were going for $450. I bought them 3 years old and had nothing but issues.
My usage was 4 in series to get 48 volts for a solar inverter. I could float them to 54v, but when called upon, they would undervolt within unreasonable time.
Not worth the details, they are in the heap.
Today I am a happy camper with 280ah LiFeP04.
I’m pretty happy with my 51.2V/100Ah LifePo4’s. All 18 of them. Total 92kWh. And with my two inverters at most demanding 18kW of continuous power from them, that means at most I’m draining each battery at a rate of only 1kW. So it’s not like I’m working them hard. They ought to last beyond the 19-year/50% warranty. Six of them are three years old and so far I haven’t seen the slightest degradation.
“bought them 3 years old and had nothing but issues.”
It would be difficult to make an accurate generalization about battery chemistry based on the performance of second hand year old batts, how do you know for sure they weren’t abused, neglected, permanently sulfated etc?