I have a solar charger on my Texas Hunter Feeder and leave it out all year but do shut down the feeder in late fall. Keeping the charger on even when not in use has worked great for me. Battery is in its 4th year of operation. Started right up in spring. Probably a good idea to get another battery on hand just in case. 4 years seems like a long time for the battery.

Jim at FishinPals
"If You Too Busy To Go Fishing, You're Just To Busy"