I like the ghurd controller,
But
12' can make a lot of power, and needs a lot of battery.
TS-60 gets my vote because of the bells & whistles, and simplisity.
C60 has issues SparWeb mentioned.
The ebay unit has several things I don't like the sound of.
"2 volt tolerance makes this unit chatter free" means relays, and sloppy driven relays. The sellers selection of controllers come in 40A increments (same as cheap relays) which concerns me.
"2 volt tolerance" is not much control in a 24V system.
"Dumpload is full pass through rectified unregulated from input" does not sound good to most people.
"Full disconnects from batteries so if dumpload fails batteries don't overcharge" is down right dangerous.
I will refrain from going on, though I could.
G-