Trojan recommends 10 to 13%. Even 13% is hardly a number the Trojan will not accept, and besides, a portion of the solar current is going to go straight into any appliances running when the solar can indeed some close to that recommended range.
There are reports of these large 12v Trojans requiring higher voltages for longer, compared to GC batteries, to max out the SG.
I have a single 12v group 31 ( claimed 130 A/h) that will happily gobble up 65 initial amps when depleted. It recommends a 10% rate, which would be 13 amps. My solar can just do this for a few hours on a cool June21st, and with everything electric turned off.
Charging rate maximums, IMO. apply to Gel batteries, and to lower end AGM's which say no more than 30%. When the next discharge cycle begins just before sundown, gosta do everything one can to get them near 100% before then.
