They're fine, about halfway through the expected service life. I haven't bothered heating or cooling them, they're just boring old lead acid, floating away out back.

im not op but im an offgrid farmer i use lead carbon batteries they have held up well. on a 5k inverter i run a 70 inch tv, stand alone freezer and a fridge/freezer. my home lab has been reduced to a few pis a unfi usg plus a couple of access points. i have an lte 4g ptp connection. i use gas for hot water and cooking (kinda cheating) woodfire in winter and i currently cook in summer but am working on a daytime solution with some extra panels and a second inverter -> reverse cycle. these batteries are 5 years old still going strong. only thing i dont run is stuff with an element like electric kettle. other than that no huge difference in quality of life.