Batteries not holding charge ???

[ilvtravln]

I have 2 year old deep cycle Interstate batteries, usually they hold a charge for about 2 months but recently its much shorter than before. Is there a way to check the RV charging system? When I plug into power everything lights up normal. I check the water in the often. I plug into power about every 2 months. Last set of the same brand of batteries lasted 4 or 5 years. I called Costco where I bought them and they said warranty was only for 1 year. Thanks for any help.

[Lwiddis]

Solar makes keeping batteries charged so easy. My TT is neither on the 300 watt roof main system or, when covered, on the 30 watt panel on top of my cover.

[ilvtravln]

Nothing is on. Thanks

[Michelle_S]

You don't happen to have a storage bay light that got on by mistake, or something that's drawing power?

[Lwiddis]

I’m not sure your issue is charging. Have the batteries tested. Did you recharge every two months when they very low or nearly dead?