UPGUniversal Power Group UB121000 12V 100Ah Solar Wind AGM SLA DEEP Cycle VRLA Battery 12V 24V 48V

Bought two of these in Nov 2024. About a month or two ago I noticed the fridge in the van kept shutting off. Finally pulled the two batteries and took them to batteries plus for testing. One battery still checks out as being almost new on the duty tests. The other battery had ~65% battery life. So, 1 of the two batteries was appears to be a bad battery.Contacted the vendor and they were super responsive and helpful. Had a replacement battery shipped out within a day, free of charge.Would 100% buy this battery again next time.

It's a very good Battery 👍🏾

UPDATE: I have purchased 4 of these batteries (4 years ago) and have a 400 watt solar array on the garage to charge them and use a 2000 watt inverter. I can run any tool in the garage (including a 2hp table saw) except an air compressor with a 2.5 hp motor. Last summer I took the 4 batteries and inverter to colorado camping in the mountains without any hookups at all. On a fairly hot day I ran the AC in my camper for 5 hours with only 2-100 watt panels to charge them and only dropped to 70%. Best test ever!! Running a microwave with just 2 of these works beautifully and hardly puts a dent into it for the few minutes at a time. My brother has a conversion van and does outings and only has 2 of these with a 2000 watt inverter and runs a microwave frequently instead of using a propane stove. For the price these are far better than most and can be set up inside due to sealed state without concerns. My only suggestion after reading other reviews is keep your wire lengths short and use heavy gauge cables. Best advice for any solar setup. also, if you run parallel, hook all equipment up to a negative terminal at one end of the bank and positive at the other end of the bank to equalize the charge and discharge. Just same advice for any solar setup.Great battery, good price. Arrived in fairly short order for such a heavy item. Had an issue with one that was dropped in shipping and leaking very slowly. Customer service had a replacement out in just a few days. The only thing I wish it has was wing nut terminals instead of bolt on, but that is only because I use them on a pop up camper and like to take them to the garage in between trips. I use 2 of these batteries with a 200 watt solar panel setup I bought so I can run a CPAP machine at night and never even put a dent in them with 1 nights use. I don't even bring the generator or charger as a backup any more as they get fully charged each day even with light use of a 600 watt inverter throughout the day.

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.

I bought two of these batteries and hooked them together in parallel, and they seem to work fine with my solar charging system. I used them in the Arizona and New Mexico deserts from January through March last winter, and never had any problems with them. When I returned to civilization and stopped using them in the spring I had them disconnected for about two months and then decided I had better connect my regular plug-in type charger to them. It is one of those smart pulse chargers with the different charging algorithms, the Xtreme XC100. The charger had trouble charging them, first reporting "bad battery" and then, after a few tries, charging them from a low of 25%. It stayed at 25% for several days before I decided to put more charging current/voltage to them than the Xtreme could deliver. I zapped them with my old homemade charger for a day or so, and then hooked up the Xtreme again for maintenance charging. It was happy with the batteries then, and topped them off at 100%.I don't know if the batteries were not fully charged when I disconnected them in the spring for storage. If they were fully charged, they sure drained down quickly by themselves just sitting in storage. I should probably get a battery monitor for my solar charging system to keep track of the charging and discharging rates and depths, but my feeling is that these batteries are best when in constant use, and always charged fully every day. They don't seem to hold their charge for long periods of inactivity and storage. I could be wrong, since I didn't perform a suitable test to make sure.