Direct replacements that enhance the workhorse 7400 Series. The 4400 Series will soon take over the reigns! The 4400 is available in 35, 45 or 55 amp DC outputs, and is available with the TempAssure(TM) advanced battery charging module. 11"L x 8-3/8"W x 3-5/8"H. Weighs 6-1/2 lbs. Listed for RV use.