Check your batteries

Two flooded batteries inside the TT. How are they vented?

The Lifelines are AGM so no water to check but I do get in there and check the connections due to the rather rough roads I traverse. Hard to believe they are still doing the job at around 9 years old.

How are you and the Polish princess doing?

Lwiddis wrote:
Two flooded batteries inside the TT. How are they vented?

The batteries are in a sealed box with a vent to the outside. I did a fair bit of research on gas volumes and the amount of hydrogen produced when charging, just to size the vent. So far, I haven't had any problems, going 6 yrs. with the vented box. I also have three AGM batteries inside. The batteries are split in distribution to two banks. In use, they are typically switched to run together since the requirements for charging are so close. The little Morningstar solar charge controller is very variable and settings can be manipulated easily. I'm pretty happy with the batteries but want to add more, of course. I just need to figure out weight balances to see where any additions can be added,

Thank you, westend.

Yep, maintenance is less expensive than replacement / repairs!

westend wrote:
I have solar charging them daily. The solar is a great helper but it results in faster electrolyte loss than typical use with occasional charging.

Sounds like the solar controller is chargin at too high of a voltage. Higher voltages is what results in gassing of batteries. Float voltage should be around 13.5 or so once the batteries are fully charged. If they are continually held at 14+ volts, gassing occurs.

In my RV it was very difficult to check the water level in the batteries. I killed them due to lack of maintenance. About 2014 or 2015 I switched to AGMs.

My Upgrade to AGM Batteries

Jim in Denver wrote:
How are you and the Polish princess doing?

Sorry about not answering you, right away Jim. Me and Her Majesty are still hanging in there. I think we're on yr 38 or so. There have been no royal edicts this week as I repair Her castle and Her transportation. Good to hear from you.

About the charging, gassing, and batteries: Nearly every battery has a charging voltage it's happy with and this can be seen if observation allows in its use and measurements are taken. Known beforehand is that batteries do have a finite lifetime, amount of use and charging discipline make the most difference. Batteries like to be immediately charged when depleted and ideally, a float charge is constant. A battery will always produce gas when charged. Even an AGM gasses but the gas is reintroduced inside the battery.

I try to keep my batteries fully charged and solar makes this easy, it does the charging better than I could with manual chargers. Yes, electrolyte is lost but filling a battery is easy. The trick is to do it often, not wait until plates are exposed or about to be exposed.

Thank you. It is good to know that you are well too.

You are right. Batteries are the one disposable part of our systems. The best that you can do is know your needs and make the best choices in battery type, capacity, A charge controller that has user defined settings with TC and enough solar to replace what you use on a daily basis at the very least. Taking the time to maintain them is key.

JiminDenver wrote:
Thank you. It is good to know that you are well too.

You are right. Batteries are the one disposable part of our systems. The best that you can do is know your needs and make the best choices in battery type, capacity, A charge controller that has user defined settings with TC and enough solar to replace what you use on a daily basis at the very least. Taking the time to maintain them is key.

Thanks Jim, I hope you and yours are doing well, also.

I also hope you've moved beyond that hulking truck battery I remember you using. Oof da, what a load to lift!
Yes, purpose of this thread is to alert users to look at their batteries and maybe save replacement costs.

FWIW, the Morningstar solar controller I have is configurable through the Morningstar software and offers a lot of variability. I also use temperature compensation so the charging values change with the seasons as the battery temperature changes. It is all pretty much overkill for my small system but I wanted to have in place a sophisticated solar charging system to see how nuances of solar work and what to expect should I decide to upgrade the system. At that, I'm going to qualify it as a success.

One of my next upgrades is going to be installing a bigger inverter I have and installing a small air conditioner. My rig is insulated to the point that a small AC is going to do the trick. I remember you, Jim, using a small window AC with your solar so I'm basically following your lead. Thanks for leading!

Good advice on checking connections and water level. It won't be long now before I put my TT into winter storage in a shed at my home. I should check everything this week so I am ready to winterize it quickly if needed.