SMART1500 Estimated Runtime Load in Watts UPS 20W 40W 60W 80W 100W 200W 300W 400W 500W 600W 700W 800W 900W 980W SMART1500 464 285 202 153 123 57 35 25 19 14 12 9.5 8.0 7.1 All runtime values are in minutes.