battery and outlet issues

Just a thought, after you park your POD at the storage spot you may want to take out the battery and bring it home to put on the charger. You will have to take it back when you go to pick up the POD but it only takes a few minutes to reinstall it.
As for the motorcycle battery tender maybe one of the other folks that know more about electricity might be able to answer that for you. I have a small 6 volt/12 volt battery minder that my battery is on all winter in the garage, it keeps it up without overcharging it. Goose

Any battery tender is fine for deep cycle batts and can be left attached to the battery.

The best unit I have found is the Battery MINDer, which is used extensively here in Florida for prolonging the life of deep cycle batteries, both in recreational boats and RVs.  I purchased mine about 10 years ago when my shrimping/trolling batteries were near the end of their useful life.  The Battery MINDer is relatively expensive, around $50, but can actually rejuvenate badly sulfated cells. I have used it on Groups 27 and 24 deep cycle batteries that were supposedly dead and given to me to revitalize.  I have had batteries that would no longer take a charge using a conventional charger, and brought them back to 13+ volts after a few days.  This is more than just a battery charger/maintainer, it will actually desulfate and return a "dead" battery back into service.  It will not work in all cases, but more often than not, it will revive batteries with problems.

This is not a battery tender, it is much more sophisticated and versatile.  "BatteryMINDER.com" has the full information on these units.

Well, we took the battery to a local Interstate store. Turns out we had one of the few 'bad' batteries. It was under warranty, so it was replaced. The directions for charger we have 'says' it should work for our purposes, but I think we'll get a stonger device just to be safe.

Thanks, Sleepless, for the tip on the Battery Minder. It looks like a good product! Now, to wait until the next vacation to test out the new battery. Probably should hook it up this weekend just to make sure it functions and it is t another internal issue with the pod before our warranty on the inverter is up.

Thanks All for your words of wisdom. It certainly is a learning process.

Just tested the new battery. All systems go! Now to get a new battery minder just in case our other device doesn't really do what it's directions say it does, although it did seem to have kept it fully charged.