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Trying to choose an APC UPS - Have some questions

APC UPS for Home and Office Forum

Schneider Electric support forum for our APC offers including Home Office UPS, Surge Protectors, UTS, software and services and associated products designed to share knowledge, installation, and configuration.

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Trying to choose an APC UPS - Have some questions

I have spent forever researching APC UPS's, and I have it narrowed down to 3 different models

  • SUA1500RM2U - Older 1500VA 2u Rackmount Smart UPS

  • SMT1500RM2U - Newer of the above

  • SMT1000RM2U - 1000VA of the above

For either of the 3, I will be using AP9630 or AP9631 network cards. I only have a 200w load, but I want a long runtime. In the future I may mod the UPS to attach some really large batteries, but for the time being I will use the stock ones

  • Question 1 - The transfer time for the older SUA1500RM2U is listed as 2ms, and then for the newer SMT1500RM2U its listed as 4ms/8ms max. Why does the newer UPS, have a slower transfer time?

  • Question 2 - The SMT1500RM2U and the SMT1000RM2U have the same physical dimensions, however the SMT1000RM2U has a smaller battery capacity. The images of the battery trays look the same though as far as I can tell (APCRBC132 and APCRBC133). Could I just upgrade the batteries in the SMT1000RM2U to have the same capacity of the SMT1500RM2U? I don't need anywhere near to 700w or 1000w of load capacity, so the size of the batteries is really all I care about. I will probably end up buying the UPS with no batteries anyway

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