Pure Sine Wave UPS

Anonymous user · ‎2021-06-29

I understand my old reliable Back-UPS LS 700 is not pure sine wave or sinusoidal. I have 2 questions please;
1. will there be compatibility problem with newer computer power supply units (PSU) that are Active-PFC?
2. can I use my LS 700 to my home theater equipment, i.e. XBR LCD, DVD, DVDR, Blu-ray, Speaker/Subwoofer system?
Thanks.

Erasmus_apc · ‎2021-06-29

In regards to old Back-UPS units (roughly before mid 2008) and PFC power supplies: yes, you will encounter issues with active-PFC devices/PSUs. Symptoms include: load drops and load "reboots".

Starting in mid 2008 all of our Back-UPS products being manufactured were revised to better handle load requirements for PFC devices, both through small firmware and hardware revisions. This allows the majority of Back-UPS being manufactured now to handle most (not all) PFC loads within their wattage range much better than older units. Their output is still stepped-approximated, however, and we still find the occasional PFC device that they have trouble with, especially those with high inrush currents or those that are just plainly "oversized" in relation to the UPS. If you feel that you would be better suited with a new unit, you can always follow our Trade-UPS program to get a new unit at a discount.

You should be able to use your LS700 with a DVD and DVDR, as well as the Blu-Ray player fine. I would leave the LCD tv and the Speaker/Subs (high inrush) on an AV-dedicated system, or newer/bigger UPS system.

See Answer In Context

Erasmus_apc · ‎2021-06-29

In regards to old Back-UPS units (roughly before mid 2008) and PFC power supplies: yes, you will encounter issues with active-PFC devices/PSUs. Symptoms include: load drops and load "reboots".

Starting in mid 2008 all of our Back-UPS products being manufactured were revised to better handle load requirements for PFC devices, both through small firmware and hardware revisions. This allows the majority of Back-UPS being manufactured now to handle most (not all) PFC loads within their wattage range much better than older units. Their output is still stepped-approximated, however, and we still find the occasional PFC device that they have trouble with, especially those with high inrush currents or those that are just plainly "oversized" in relation to the UPS. If you feel that you would be better suited with a new unit, you can always follow our Trade-UPS program to get a new unit at a discount.

You should be able to use your LS700 with a DVD and DVDR, as well as the Blu-Ray player fine. I would leave the LCD tv and the Speaker/Subs (high inrush) on an AV-dedicated system, or newer/bigger UPS system.

Anonymous user · ‎2021-06-29

Thanks for the swift reply. Will it be ok if I just use the "always on surge suppressor" outlets of the LS700 for the LCD TV and speakers/sub?

Erasmus_apc · ‎2021-06-29

Yes this will be acceptable, as it will give you surge suppression to protect your TV and sub. Just keep in mind that the surge outlets will not do any voltage regulation or back-up of any kind, so other than the surge suppression you are looking at basic wall power.

Anonymous user · ‎2021-06-29

I understand. Thank you again for your very enlightening replies.