Sterling Power 12V 40A Pro Charge Ultra Battery Charger PCU1240 Sterling Power's line of 12V 10-60A / 24V 20-30A Marine Grade, Power Factor Corrected Battery Chargers set a new standard of what you should expect from your battery charger when it comes to features, performance & price. As these chargers are digitally controlled it is possible to simply add these chargers in parallel or series to achieve larger voltages or currents. Sterling Power's years of experience in the battery charging industry has provided the insight to include everything we could possibly think of and combine it all into the Pro Charge Ultra. This exceptionally efficient power factor corrected battery charger runs on any global AC power source between 90-270 volts (freq 40- from 70Hz). The unit requires less input power, liberates less waste energy and is still remarkably lightweight with a small footprint. The Pro Charge Ultra range of battery chargers are among the worlds most efficient chargers, thanks t