標案中最低價格apc on-line的是APC SURTA3000XLTW
http://ctoc.mitac.com.tw/LP5-970061/UI.htm
google有幾家 SURTA3000XLTW寫為Line-Interactive

apc官網歸類為on-line的有

APC SMART-UPS RT 1500VA 120V
SURTA1500XL

APC SMART-UPS RT 2000VA 120V
SURTA2000XL

APC SMART-UPS RT 3000VA 120V
SURTA3000XL

APC Smart-UPS RT 3000VA 110V
SURTA3000XLT
要入手哪種 才是真正on-line的?