Go Power GP-AGM-100-12 SunCycle Rechargeable Replacement Solar Battery - Deep Cycle 12V AGM Battery, No Maintenance, Sealed & Spill-Proof for PV Solar, Inverter, Camper, Boat, Marine & Off-Grid Use

After reading that one review from a guy who was accusing scam and false advertising for an AH rating at 1A, I was anxious to get my new battery in and test it against the specifications given. For you geeks, I used an Array 3720 DC Precision Load for my source and tested from full charge to 11.0 volt depletion ( most often, mfgs will test to 10.5 as "dead" but I like to stay a little north of that as it extends the life of the battery) using an automatic timer to end the test the moment the battery dropped to 11.0 volts. I used a constant load as this is real world rather than a variable load source that will adjust as battery voltage drops. For the sake of comparing to the baseline and other batteries, I used Peukert's Law and some other funny math to adjust my results to make comparisons. I am PLEASED to announce that this battery tests awesome, slightly better than the 105AH /20 or 110AH/100 as specified. And no this is not false advertising as many of the cheaper deep cycle batteries are giving a 100 specification without stating it, so both values could be helpful. So, for those of you would would like a simpler way to compare deep cycle batteries without needing a college degree in mathematics, here's a super easy method. Geeks will criticize me for this with a little bit of legitimacy, but if you stick to this test, you cant go wrong. Comparing 12 volt deep cycle batteries in size 24, 27, or 31......simply compare the weight. With few exceptions, the heavier batteries with have more storage capacity. Then compare $$$ per pound......and decide how much you want to spend. You'll usually end up back here. Enjoy!

I had a question about the actual measurements of the battery as the ones in the description seemed rounded off. I sent a message via Amazon on Friday night and Sunday morning I had a response with the exact information I requested. The deli ery was very fast. Ordered the batteries on Friday, it said between Nov 24th - Dec 2nd. Right after I ordered it showed a delivery of Dec 2 which I figured was about right with bringing batteries into California. To my surprise they arrived today on Nov 24. Fully charged ready to go. Will update as I get some time using them but so far its been great.

working well and seems to be taking charges from panels , had for 1 week and all is well

Battery came fully charged and works well!

Worked well at first, kept charged all the time, failed completely after less than a year, do not buy this battery. Bought two, completely regret it

Ordered two, one came within two days the other did not arrive. Needed two for the 12v system. Reordered another one, then chatted with amazon they ordered me one, then tried to cancel the first one , which was all of 5 minutes later and they wouldn't let me cancel it so I have an extra 3 hundred dollar battery. Not happy, but they were the only ones that I could find that would fit

Very happy with everything

Ordered two batteries to replace the 4 year old batteries I have that are only about 50% now. Exact same batteries. Everything I read says get two made at the same time. One is 2024 and is a lesser voltage via a multi meter test, and one is 2025! Of course the 2025 was dropped and has a semi-smashed corner right out of the box. Disappointed is an understatement. For nearly $700 I expect WAY better quality control and not just sending an imbecile to grab two batteries off the shelf that are a year apart. I need to use them to be able to see if they will perform, but truly it’ll take 3-4 years to know.

So far so good. Charged with 100W solar panel and a Mohoo charge controller. Disconnected panel and ran a 65W laptop full out for over an hour with negligible voltage drop. Really looking forward to installing this (and that panel) at our cabin on an island in Lake Huron next week.

Costly but good

This item discharges fast , how do I apply for warranty?

Very happy with these batteries. Can’t believe I was putting up with the Kirkland deep cycle batteries for the last ten years and replacing one or the other every couple of years and constantly having to fire up the generator. These are great and hold the charge very well!! Not cheap but worth it in the long run and much happier off grid..

So far so good after a couple of months in marine house battery application. Will see how long it will last in a few years.