For 1 kVA to 3 kVA online or line interactive models, expect 600 to 1,800 dollars for the unit, plus 100 to 600 dollars for batteries, and 50 to 500 dollars for installation. Expert Tip: When comparing 3kVA UPS prices, consider total cost of ownership—not just the purchase price. Look at efficiency ratings, battery replacement intervals, warranty length, and scalability to ensure long-term value. Note: Prices may vary based on brand (e., APC, Eaton, CyberPower. This item can be returned in its original condition for a full refund or replacement within 30 days of receipt. The media could not be loaded, either because the server or network failed or because the format. Line-interactive UPSs with rechargeable batteries that maintain uninterrupted power to critical loads via multiple output sockets during mains failures; they also protect from mains undervoltage and overvoltage. The pictures displayed for this unit are a general representation of form factor for the product line and may not accurately represent this exact configuration in every detail due to custom. Uninterruptible Power Supply (UPS) systems provide power to computer networks in the event of a power shortage or electrical outage so computers and other sensitive electronic equipment can be turned off properly. 3000VA UPS has selectable 220V/120V AC input and output voltages with LCD display and overload protection, reliable power source for networks, personal computers and other peripherals during.