AGM Battery Longevity

Mine are at 10 years and seem to be holding up well. Hard to compare because when new they were powering a plasma energy hot TV and halogen lights... now all LED. This past six month we did a lot of dry camping... probably 50 days with four 5 day stays. I'm now residential but have more AGM batteries for it than it really needs. Two hours of generator time kept them up which is less than when new BUT we used more power when they were new.

I would do a test by turning off the shore power and living in your rig for a day or two and see how it goes. Instead of cranking the generator when the batteries need charging you could just turn the power back on.

JimK-NY wrote:
I have had my Lifeline AGM batteries for 7 years.

You got good value from them over 7 years.

Although it's a different animal, I've found that they start showing signs of age in a "normal" automotive application around 7 years.

I agree with your thought; if you have a "mission critical" application, I think you might as well replace them......when it is convenient for YOU.

I would think you should be fine. My Lifelines lasted 10 years and they still worked but they has a bit of reduced capacity so I put in new ones (not Lifeline saving $$$$).
If your generator has auto-start you can set it to engage should the batteries get low for an additional measure of safety. If you find it to be a problem your batteries can be replaced most anywhere at any time.

A space heater will suffice as the proper equipment.

You need a known load and a stop watch.