Simple UPS for IoTaWatt

During a power outage, I only need about 60 seconds of battery run time before the generator turns on. So, I’m thinking about splicing a simple battery backup, inline on the IoTaWatt’s power adapter cable. Will it work? The IoTaWatt’s load current should be less than 1A DC.

Don’t know the details. I guess it depends on the battery you mate it with. Another approach that I think would work, and maybe a little simpler, is to get a rechargeable phone battery pack and run the IoTaWatt from it with the charger connected all the time.

You might want to read up on this site.


He has quite a few articles on UPS for Raspberry PIs. While they do require more power, the other needs are similar. Many of the system’s don’t charge, while providing power. It probably wouldn’t be a problem for your usage for a while, but might be eventually.

The board approach above still needs a battery, enclosure, cables, power supply, and a lot of time. Depending on the entertainment value of the project, it may not be worth it. What about just a small UPS on the 120 volt line?

https://www.amazon.com/AmazonBasics-Standby-UPS-400VA-Outlets/dp/B073Q48Z95/ref=sr_1_1?qid=1560872886&refinements=p_36%3A1253504011&s=pc&sr=1-1

The Amazon Basics UPS is what I had initially planned to do, however it won’t easily fit inside my sprinkler control box. So, because the IoTaWatt only requires 5V DC power, I could use a much smaller DC-only UPS.

I ordered the 10000mAh power pack by Ravpower for $20. Hopefully it can be charging and discharging simultaneously, similar to a UPS. And, hopefully it can handle adverse electrical conditions (high and low voltages), similar to a UPS.

The Ravpower power pack unit fits inside my Orbit sprinkler box, however it does not work like a UPS. When the power is lost, it shuts down. When I press the side button, the unit turns on and powers up the IotaWatt, but then turns off after 10 seconds. It works exactly like any power pack, just not a UPS.

Nice clean installation.:+1:

Just ordered this, as my next attempt with a simple DC UPS. Probably shipping from Manila, delivery in 30 days.