Is my Battery Going Bad?

[wltrmtty]

I purchased the van in April, 2019. It has 2 deep cycle SRM-27 Interstate wet cell house batteries purchased April 2017. I checked the electrolyte on both batteries and they are full. I recently purchased and installed an AIMS 600W pure sine wave inverter-charger with remote panel which shows battery voltage, input/output, etc. Prior to installation of the AIMS, I didn't know the charge level of the battery, as if that would be an issue.

I have had the House system hooked up to a 15A garage outlet for about a week. The battery status on the remote panel shows the batteries to be at 12.6V. When I check the voltage of each individual battery (although they are still connected), my voltmeter reads 12.12V.

Putting the discrepancy aside for a moment, I can't seem to get a higher charge. Are my batteries dying? Any insights?

Frankly, I have no problem riding it out and buying a sealed system when they die.

Thanks! Terry