Desulfate 12 Volt Batteries

I have some deep cycle batteries that have become sulfated and I have seen on you tube some home made desulfating chargers but I do not trust these designs. Is there someone that can assist me with a better design for a home made charger. THIS IS FOR A PORTABLE SOLAR SYSTEM THAT I CREATED TO PROVIDE POWER WHILE I AM WORKING IN THE WILDERNESS. I installed it in an Isuzu Rodeo and I put the solar panels on top of the vehicle when I set up my camp and to supply power for power tools etc.