conventional internal combustion engine technology has been around for decades and historically has been the primary power source for virtually all industrial equipment . it relies on carbon - based fuels , is loud , polluting , and the machines it powers are expensive to operate and maintain . a self - contained , rechargeable battery system is provided that possesses superior power than comparable diesel and gas engines . the rechargeable battery power system generates zero emissions , is virtually maintenance free , is quiet , and recharges overnight via a standard electrical outlet . the rechargeable battery power system can be installed in new and used construction equipment and may be used wherever a source of power is required , for example , in vans and boats , and in supplemental power systems including smart grid applications . it can be safely used indoors , in neighborhoods and other locations sensitive to the side effects of internal combustion engines .