APC Backup Question

[TomD]

Can anybody tell me if this one is "true sine wave?"

I had a real nice one with my old tank but it is like $2,000 new, not spending that. Just want one to run ph's in the event of a power outage.

http://www.staples.com/APC-Back-UPS-CS-500VA-6-Outlet-UPS/product_455382

 

[JayM]

probably not...

http://www.apc.com/resource/include/techspec_index.cfm?base_sku=BK500

 

[afboundguy]

Try these... 8 hours for a koralia 3 and a tunze 6045 (separately) http://www.bulkreefsupply.com/store...s/power-head-battery-back-up-1200-8-hour.html

and this one is 4 hours http://www.bulkreefsupply.com/store...ms/power-head-battery-back-up-800-4-hour.html