Daisy Chaining Ups

[Captinjigglesworth]

Hello, i purchased one cyberpower or2200pfcrt2u and received a second one on accident, i was wondering if I could plug one into the other to extend my time?

[Applefreak]

Before we go any further, did you contact cyberpower about the wrong shipment? You can't keep something you haven't bought.

[Captinjigglesworth]

it was from amazon, they let me keep it because I ordered somthing else but they sent two of the same things. its amazons policy.

[brwainer]

Don’t daisy chain them. Main reason being that with so many outlets its easy to forget and plug in too many things that overloads the outlet/breaker they both plug into. Second reson is that when the power goes out, only the first UPS in the chain will know, so its inverter will provide power to everything including the second UPS. The third reason is that if you have a power outage and they drain, when the power comes back on the second unit recharging may draw more power then the first is rated for, and both of them recharging at once may overload the breaker.

Best thing to do is to plug in one UPS per breaker circuit, and spread out the devices between them (although if you are careful with not plugging in too many things, two UPS on a single breaker can be OK - remember to factor in things which are on the same breaker but not plugged into a UPS also). UPSs last longer in an outage situation running at reduced load - half the usage will give more than double the battery time. 

[Captinjigglesworth]

49 minutes ago, brwainer said:

Don’t daisy chain them. Main reason being that with so many outlets its easy to forget and plug in too many things that overloads the outlet/breaker they both plug into. Second reson is that when the power goes out, only the first UPS in the chain will know, so its inverter will provide power to everything including the second UPS. The third reason is that if you have a power outage and they drain, when the power comes back on the second unit recharging may draw more power then the first is rated for, and both of them recharging at once may overload the breaker.

Best thing to do is to plug in one UPS per breaker circuit, and spread out the devices between them (although if you are careful with not plugging in too many things, two UPS on a single breaker can be OK - remember to factor in things which are on the same breaker but not plugged into a UPS also). UPSs last longer in an outage situation running at reduced load - half the usage will give more than double the battery time. 

thank you very much for your input I didn't account for the recharging of both of them.