I used a Noma 400 watt home back up and it worked well for many years. Now the battery is dead and I will try to replace it or I will buy a new one. This think takes over as soon as the power goes out and it last for a few hours depending on your load. I put my pumps on it and my skimmer and with 30 watt of load I can last for about 10 hours.
Next time I think I will buy the stronger model, althouth more expensive.
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