Solar battery charger for tractor

[Norman]

Hello good OTT folks, my tractor is stored in a lean-to shed without any power close by and I was looking for a solution to keep my battery charged on the LX2610. It gets used mostly in cooler months and will likely not be started much over the summer time. Found a few solar chargers on Amazon...does anyone have experience with these? Seems like a pretty good deal, so that's why I'm asking.

Looking specifically at this one: https://www.amazon.com/dp/B07WYP4H6...colid=26VYL53HWS2NM&ref_=lv_ov_lig_dp_it&th=1

 

[GreensvilleJay]

had a look at the specs.... produces 21 volts at 1.5 amps.. consider it a 'trickle' charger, a 'maintainer' that'll 'top up' a fully charged battery.
a 'lot' of power is wasted, only need 16-17 volts to a 'charger'', so +-6 watts of energy is wasted in this unit....shame...