Bests & Worsts Reviews from Amazon

I purchased 8 of these Universal Power Group solar deep cycle VRLA 100ah batteries for my solar application. We have been using Walmart marine batteries in our solar power system for the last 18 years. I bought these batteries to replace 4 year old Walmart Marine batteries we used with solar panels and a MPPT controller. I hoped to increase my stored capacity because the Amp Hour rating on these batteries was greater than the walmart marine batteries we had been using. Well after almost 4 months of frustrated use I can tell you that the Universal Power Group batteries do not measure up to the walmart marine batteries nor do they each store 100 AH of power. The 8 Universal power batteries will not charge past 12.5 volts (marine batteries charged to 13.4) and do not provide power near as long as we saw from the Walmart marine batteries which cost less $$. After reading other reviews I think we probably have some bad batteries in the batch which are dragging the other down so I'll have to load test each one next time I'm at our ranch. FOLLOW UP I load tested each and every battery after charging them to 12.1 - 12.3 VDC and they all tested good. The problem with these batteries is that the MPPT shows them at 13.1-13.4 vdc as long as the sun is at peak elevation in the sky. As soon as the solar panels are disconnected the battery voltage drops to 12.2 - 12.4. This means the batteries aren't charging past 12.3 or there abouts So not way they can output 100AH. They have done this since new. They are now 3 years old and discharge much faster than the first year. I've even pre charged the batteries (using a 75 amp smart charger) to 12.3 volts prior to the sun rising and then let the 19 watt solar panels charge the batteries all day long and once the sun goes down or if the panels are disconnected the battery voltage almost immediately drops to 12.2-12.3vdc.