Yes, they certainly make AGM golf cart batteries as others have pointed out. They run anywhere from double to four times the cost of flooded cells depending on the amount of lead (more is better) and the premium paid for the brand name/warranty. Nothing is free and longer warranted batteries cost more.
Just as important as the battery you choose, (and maybe more so), are the charge settings on your chargers and controllers. The cheapest battery maintained with proper charger settings will perform better and last longer than the the most expensive battery with improper settings. Also, leaving a battery (or your coach) in storage without a regular maintenance charge on the batteries will destroy a flooded battery in 6 months and an AGM in a year or so. Lead acid batteries have a relatively high self discharge rate (though AGM is about 1/5th flooded) and will sulfate rather quickly. Make sure your chargers/controllers are set up to meet the battery manufacturers specs and batteries are regularly brought up to 100% full charge.
If you are using 6 volt batteries, make sure that your jumper wire tying your batteries together is of sufficient size. Even professional installers skimp in this area because of the high cost of copper wire. Larger is always better. If you are going to use a large inverter (1500 watts or larger), all wiring between batteries and to the inverter should be as large as you're willing to pay for. 4-0 (0000) is the largest practical size, but if your inverter is within a couple of feet of the battery then you can probably get away with 1-0 or maybe even as small as #2
. Again, larger is always better and it is a one-time cost.
Many people install large battery banks and then are very disappointed because the performance isn't as expected. Most of the time you can trace the problem back to one of 3 causes:
1- Shaded solar panel. As was pointed out in a previous post, shading one cell, or having a line of shadow from a pole across a panel can drop its output by 50% or more. Shade from a vent or air conditioner along the edge of a panel will do the same thing. I've seen a solar installation on an RV with a 300 watt panel and only putting out 50 watts due to a 2" wide x 18" long shaded area along the edge of the panel from an air conditioner. Sometimes the problem can be mitigated by parking your rig with proper orientation to the sun so that shading doesn't occur.
2- Improper charger settings. Life of the batteries suffers, and/or, battery capacity is severely impacted. I've seen properly charged golf cart batteries from Sam's last 7+ years, and I've seen Trojan T105's only last 2 seasons. The Sam's were properly charged and kept on maintenance charge year round where the T105's were charged from the vehicle alternator through a battery isolator and then left 6 months at a time with no charge with the RV in storage.
3- To small wire size - especially where the batteries tie together, and going to high current devices like inverters. The small wires use up some of the voltage going to the equipment so the equipment thinks the battery is low and shuts itself off. The batteries might actually be 13 volts but the inverter only sees 11.7 volts when it is pulling high current through the small wires feeding it and so it shuts itself down. I've seen this many times. Plenty of battery power, but the inverter couldn't use it properly.
I guess my point is, that a successful house power system isn't just the batteries. Good performance is dependent on the entire system and solar panel size and placement, battery size and type, charger settings, and wire size are all equally important.
I spent 42 years as an electronic and telecommunications technician installing and maintaining battery power systems, two-way radio systems, microwave systems, telephone switching systems, fiberoptic systems, and the like. Many of the batteries I worked on took up the space of an average living room. The fuse and power distribution panels were 19" wide and 6 feet tall. What's interesting is that their requirements are exactly the same as the smaller batteries we use in our RV's and camper conversions.