Best solar trickle charger with shutoff for price?

[FLtractor 183]

Evening,

Came across this online.. is this the best Solar trickle charger to keep my 856 battery charged while hooked up inside tractor. 10 watts enough? Florida sun. Auto shut off good so no battery damage. Other one you’d recommend?
https://www.harborfreight.com/10-watt-solar-trickle-charger-70830.html?hftm_sc=189&hftm_source=google&utm_source=google&utm_medium=cpc&utm_campaign=21901739240&campaignid=21901739240&utm_content=171677809902&adsetid=171677809902&product=70830&gad_source=1&gad_campaignid=21901739240&gbraid=0AAAAADAHb4dCpgwLTBeXP0Ntb6gYRkpHi&gclid=EAIaIQobChMI6vf9-92jlQMVUF3_AR0diCS6EAQYASACEgII3vD_BwE