GEL versus AGM

Moved from technology

Gel batteries have a very specific charge rate, cannot be allowed to heat up, or it forms gaps in the gel
Besides when you go for batteries any thing in consumer group size to fit the RV is most likely agm
Gel is not common in larger sizes
Gel is old tech from the start of the space program in the 50's
Some are mfg for specific applications
But most have been replaced with agm

Hi,

Depth of cycle is only one part of the equation.

Recharge and discharge rates have to be much lower with gel cells. Exceeding the safe rates will result in permanent loss of capacity. If you never use an inverter gel would work well, provided that the converter used for recharging has a setting for gel.

I've not seen a 12v Deep cycle gel cell other than an AGM, but there's several blank spaces in the question. The DOD delta here is 30%, so if you are proposing to charge either of them in 2.5 hrs for example, the charge time is obviously going to be considerably different. You also didn't mention the capacity of either battery you were looking at. Either way need to return what you pulled out of either battery. Personally I would always go with what can be drawn down the farthest without nuking the battery.