Well, to save propane I would lean towards the compressor refer, but only IF you have a sufficient battery bank of at least 400 usable amp/hrs and a minimum of 400w solar…By ‘usable’ I mean Lithium (meaning LiFePO4…), a Lithium compatible SOC (state of charge) shunt- based battery status meter (so you can accurately arrive at true SOC), and that you understand how to charge them…
This latter item simply means, not to exceed 14.6v, no equalizations (as required with wet cell types), and once charged, not to leave them on the charger for an extended period of time…And since the voltage plateau remains nearly constant and flat, there’s no real need to keep them fully charged (as you would normally strive for with acid wet cell types)…An ‘occasional’ full charge is all thats really needed, this just to allow for periodic cell re-balancing…Also, (upon edit) know that Lithium cannot be charged if below 32d/f ( but can be safely discharged down to about -04d/f) so there are different strategies used to address this issue such as, interior mounting, heated basement, batteries with built-in charging heaters, or external, retrofitted electric battery blankets…
3 tons