SUMPRO® is the ultimate, fully-automatic auxiliary power source that money can buy. SUMPRO® is a power converter which allows you to do what you have never been able to do before. The SUMPRO® takes D.C. battery power and converts it into 115 VAC power (when standard power fails or is not available). This allows you to eliminate those unreliable 12 VDC powered pumps and continue to use your standard 115 VAC pump without any modifications or piping changes.