So we have 2 old APC Smart-UPS VT 15 kVA. They are for data centers at 2 of our locations as well as some other critical areas in the buildings, they are hooked up to 3-phase power and a transfer switch for the backup generators. They are fairly old since we got them in early 09 and are currently both in need of battery replacements.
Our power needs have been reduced considerably since then though so we are looking at replacing them with new smaller units. Probably something in the 7-10KVa range.
So far I've been looking at APC Symmetra PX, APC Galaxy VS, and Eaton 9355 models. I'm just wondering if there's better models or options I should be looking at or any reasons I should prefer one of those I'm already looking at over the others?