On our cheapie '03 Escapade, tanks are open/under like jcsb's and have heater pads, switch in the bathroom.
We have the IOTA converter and it does not boil the battery. We have but one battery and I don't have to add water for months at a time. We can leave the coach plugged in with battery/converter ON without much worry. But I only do that when the coach is "up" for use, like fridge/propane detector ON. I don't leave it with battery on but nothing else on.
We're not original owners, but I'm pretty sure the IOTA does not have an optional anything connected to it to help control the charge.
If God's Your Co-Pilot Move Over, jd
2003 Jayco Escapade 31A on 2002 Ford E450 V10 4R100 218" WB
We have a Melbourne 09. We have tank heater pads. They are attached to the bottom of the tanks. There is a sticker on the side of the coach advising such. There is a separate switch with a red toggle on the bath vanity below the electric outlet. There are 5 other switches located in another location on the same vanity.
I do not have a switched (independent) heater for the tanks either. The heater ducts run under the tanks and provide heat as long as you are running the house furnace. I have noticed that when I run the house furnace, the bathroom is getting more than its fair share of heat.
As to the Iota converter/charger; I purchased the add-on charge controller and plugged it into the unit. I have not boiled the battery since, but I should say that I am much more attentive to the water level now, as well.
Like many manufacturers these days, the owners manual for my unit is not very specific or accurate. But, this forum sure helps me for getting answers.
Hope this helps.
I have a 2003 Granite Ridge 3100. On the original manufacturers invoice it lists "enclosed heated holging tanks" as part of the package. The owners manual talks about heated holding tanks and mentions the switch to turn the heat pads on/off will be located in or near the bathroom. I have 5 switches in the bathroom, 3 lights, water pump, overhead fan. I do not see any other switch. Any ideas??? Any of you have any experience with the Iota converter/charger and boiling the battery as I did. Thanks for any info. Jerry