Waoo, battery backup really works

[dz6t]

I only realized there was a power outage early this morning by seeing a tweet from the town right now.
Everything works normally as if the power outage was not there at all.

 

[dz6t]

Knock on wood, wait, I need to find a piece of wood…

 

[mandarin]

What are you using for backups?

 

[dz6t]

I have lithium batteries on every return pumps.
They are those computer UPS that I replaced their lead acid batteries with lithium batteries.

 

[chadfish]

I have lithium batteries on every return pumps.
They are those computer UPS that I replaced their lead acid batteries with lithium batteries.

How long did they last?

 

[dz6t]

I have 1350 VA UPS powers 40w return pumps, last time I tested it, it ran overnight and still going strong at full power. I did not run the battery dry to protect the battery.
Despite these Lithium batteries supposed to be “deep cycle” and are able to run dry, I don’t want to take the chance and shorten the battery life.