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

I planned to use these batteries to power a small sump pump with an APS1250 inverter to prevent my basement from flooding but I've found I can also power other things as needed with them.(Winter 2019 Outage 1) No need for it to power the sump pump since it's so dry. I have two of these in parallel and I had a power outage over the winter of over 5 days. These two batteries in parallel hooked up to an APS1250 inverter/charger had no problems at all running my garage door opener, recharging my USB devices, or recharging my phone, or recharging my laptops during the entire 5 days with no power. There was also a day where the snow plow blocked off the end of my driveway and I couldn't get out to get to the office but had a meeting in an hour. Plugged in my home networking equipment (switch, fiber box, etc.) and was able to join the meeting from home. After 5 days the APS1250 indicated the state of charge of the batteries to be Red+Yellow which is 41-60% charge. The power came back on shortly after that and it took about 6 hours to charge these batteries back to full capacity with the 12V 30 amp charger in the APS1250.(Spring 2019) Lost power during 50+ MPH winds outside and a complete downpour with a river of water going down the street. The Tripp Lite APS1250 is powering just a small sump pump and and it pulls its power from 2 of these batteries in parallel. The Sump pump pulls in 1000 watts easily and it was turning on every 5 minutes and running for about 6 seconds. Power outage ended after an hour and through the entire power outage the APS1250 indicated battery capacity of the bank at 100% although it did click on the charger when the power came back on and ran for 30-60 minutes.Important Note: My APS1250 when configured for "AGM Batteries" keeps these batteries at 13.75 Volts when on line power. I see a number of comments by people talking about a 12 volt charge on these batteries and I think they are not charging these batteries properly. A 12 volt reading on this battery is the battery in a discharged state!Overall I'm satisfied with the performance of the batteries so far, I hope they last a long time.

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 got this battery since it was a higher capacity than I needed and it will allow me to expand my system later. I have a 180W panel, MPPT, 12V battery, 400W inverter and quad USB fast charger connected as a 12V semi-portable system. Since installing this battery, I have run 17 kWh of load energy and the system is running great!This 12V, 100Ah battery allows me to have a maintenance free battery with ample capacity to charge a Roomba, laptop, cell phone, etc. after dark and never worry about running out of charge. Even during three days of heavy clouds last Fall, the battery survived and did not fully discharge.Please read other web pages on proper use of AGM batteries. Make sure that your charging circuit does not exceed the battery's recommended charge voltage. Do not use an equalizer charge unless the manufacturer explicitly allows it and follow their instructions for that process. Charge the battery fully once a day whenever possible to prevent sulfation. Place an inline fuse as close as possible to the battery's positive terminal. Remember, repeated deeper discharges cause a shorter lifespan.Recently one of our car's batteries discharged and wouldn't start the engine. I disconnected this battery and jumpered it to the car. The car started right up. I don't recommend starting a car with this battery normally (it is designed for deep cycle and not starting vehicles) but it worked perfectly!