Couple of concerns I noticed over the weekend

aarond76 wrote:
For your water issue:
You have air in the system. Hot water tank was empty and full of air. When you turn the pump on the first thing that happens is the pump fills the hot water heater. In doing so you pressurize the air in tbe top of the hot water heater. Then when you open a cold water faucet the hot water back-flows out of the inlet side of the hot water heater and out the cold side of the faucet. You may have noticed the pump did not come on right away when you opened the faucet like it normally does. Once the pressure drops low enough in the hotwater heater the pump comes back on and fills the hot water heater back up again. Open the hot side of the faucet until all the air is out of the system and this problem will go away.

With your battery issue:
Your described usage should not have drained a battery over a weekend. And like you guessed, they certainly could not recharge it from dead in an hour. I question if the battery is any good.

Agree with both of these.

How the dealer winterized should be obvious based on if you had any "pink stuff" come out or in the sinks and tubs when you turned on the water (If you had not flushed it prior to the trip).

If not, they likely blew it out with air and opened the low point drains. Thats one thing I would go back and check. Make sure that the low point drains all are firmly closed and your not missing a cap. But I believe aarond76 hit it on the head. Empty hot water tank filling up is the reason for your pump running a while, double check the faucets are closed (including the outside shower or any hose hookups).

There are a lot of little draws (carbon monoxide detectors, LP leaf dectors, smoke alarms, radio, different circuit boards) that draw a bit that can discharge a small battery like a group 24 over just a couple days without any other use. My camper came with a group 24 and if I didn't leave it plugged in, the battery was low enough that the lights would barely flicker in just 4 days after parking it at home.

Some other things to do besides adding the extra battery:

Put in a cutoff switch on the battery or disconnect a cable once you return home.

Switch to LED light bulbs instead of the ones that came standard. Use about 10%-15% the amount of juice.

I upgraded to a single group 29 battery and LED's and can go 4 days without really trying to save or skrimp on battery power. GOing to switch to 2 group 27's when this one dies in a few years.