Those are designed to let it run for a bit, then gracefully turn the computer off. And, with the way most people do maintenance, the batteries will have maybe a few minutes left in them when the need arises, and you lost all your backup.Īgreed that APC makes good stuff, but to run a 1/2-1Hp pump for awhile means much more than the typical UPS you might put on your computer. The batteries don't last forever, and if you don't monitor them, neither will work, but the dedicated battery backed up pump system's batteries are probably cheaper to replace. the only advantage is the UPS only takes a few seconds to install: unplug the cord, plug in the cord of the ups, then plug the pump's cord into the ups. If you don't like the result, buy another battery and connect it in parallel to the first.A UPS big enough to run a decent sized pump long enough to make a difference during a power outage costs way more than a dedicated new battery backup pump system. In your case, you might just try running a hose into the sump pit for a while on a normal outdoor irrigation day and route the output into the garden, just to see how many cycles you actually get from a single battery charge. For commercial UPS devices the vendors offer calculation methods that compare battery types and chemistries against an expected load profile. A single start and continuous run will give a different result than dozens of starts with short runs, especially with the inverter drawing a low-level load in the background between pump operations. Batteries respond very differently to differing load profiles. Unfortunately a straight W-h calculation won't get you an accurate reserve calculation. Conventional automotive lead acid might be cheaper but it will off-gas hydrogen (must ventilate) and if you run it dead in one event, it might never come back. Third, you do need a deep-cycle, sealed marine battery for this application, or you might even want two or three in parallel to increase your run-time. Or, get better numbers using the Kill-A-Watt. While 1.0 hp is nominally 746W, that's shaft mechanical output and the rule of thumb for estimating electrical load is around 1000W per hp. Second, you have a single sump pulling 0.5hp 115V. Is it rated for that? Looks like it's designed for appliance duty and you've overspec'd it a bit relative to the load, so it might be fine. But your inverter needs to momentarily supply about six times the run current in order to start the motor. While there are multi-kW all-in-one UPS devices available, the cost is in the range of a good used car, and for heavier duties you're buying separate battery and charger systems regardless.įirst, looks like your preferred inverter has a charger/conditioner, which means the additional conditioner isn't needed.
Some combination of charger, battery system, and inverter/transfer switch are required and integrated according to the project needs. What you're trying to do is the miniature version of a large telecom or industrial UPS, which is part of my day job. Thanks in advance for being part of my research. These are not things I play around with daily. Is my shopping list missing anything? Is the battery tender redundant when paired with that inverter? Can I run one of my pumps off the inverter/battery/tender 24/7 without harm? Or does the inverter handle charging the battery/running the pump when it has power and switches to drawing from the battery to run the pump when the power is out? What can I scale back? I don't mind paying more for additional battery capacity, as long as it scales about linearly, but is that battery overkill otherwise? Is the inverter completely overkill? How long does a battery like that typically last? That rings up to $765! I would like to spare some expense! So, based on my research, I need a beefy inverter, a deep-cycle 12v marine battery, and a battery maintainer. Computer UPS units are out, everything I've read says they don't have what it takes, especially when it comes to the surge power on pump startup. I'm only looking to power one of them during a outage.
We have two Zoeller M98 sump pumps in our sump. I have a generator, but I want that to become my #2 option and I want my #1 option to be completely automatic and generally foolproof. Long story short, I want to step up my sump pump-game during power outages.
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