![]() ![]() I hooked up the load tester and ran it, and the needle hovered on the green line around the 600 rating. I figured it was a good investment compared to replacing a battery every 3 years as my plumber recommends if the battery has the potential to last 7-8 years. Here is a similar looking one with decent ratings). I found this load tester on Amazon for under $30 (updated – item is no longer available on Amazon. ![]() They sell load testers that you hook up to the battery and they will tell you how your battery is doing. Reading around online, it seemed the best way to test if your battery is operating properly is to do a load test. I don’t like testing it for extended periods of time because with my luck, the power will go out right after I’ve run my battery down testing it. I was trying to figure out the best way to test if my battery is really okay. These batteries are not cheap either, running about 3-4 times the cost of a similar wet lead-acid battery. Online, suppliers claim they can last 7-8 years. If it did that, I assumed the battery was reasonably okay.Īs the battery was now over 5 years old, I figured I was pushing my luck, but I didn’t know what the typical life-span is for these AGM batteries. In order to test the battery, about twice a year I would unplug my primary pump and the charger for the backup, let the sump pit fill, and make sure the pump ran a few cycles. The charger is a 3 stage charger (or at least it has 3 different lights on it) and it’s consistently shown all three lights on which means the battery is fully charged. As it was from a local distributor, there was not much information on the battery. This battery was different from the one we had before, as it was all sealed with no place to add water. When installed, the builder used a local distributor’s AGM battery (Absorbed Glass Mat) 12V with a charger to power the pump. These types of pumps can pump about 35 gallons per minute at a 10 foot head, which is significantly more volume than cheaper models that you get at Home Depot (which is what we had in previously). It will run off of the AC wall current when we have power, but runs off DC current from a large battery when the power is out. Our plumber used one that is comparable to the Zoeller Aquanot II pedestal pump. One of the upgrades was putting in a more powerful back-up sump pump. ![]() We had our sump pump system redone after basement flooding issues in 2009. ![]()
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