Blue Sea 7622 Auto Charging Relay (for dual batts) Home › Forums › General › Classifieds › Blue Sea 7622 Auto Charging Relay (for dual batts) This topic contains 0 replies, has 1 voice, and was last updated by Chad Lloyd 1 week, 3 days ago. Viewing 1 post (of 1 total) Author Posts December 2, 2017 at 10:09 pm #199242 Chad LloydParticipant Premium Member Brand new Blue Sea 7622 ML-ACR 500A automatic charging relay for sale. One of the best dual battery solutions on the market, in my opinion. Have one installed on my FJ40, and was going to install this one in my Disco, but went a different route. Technical Specs: Blue Sea 7622 Sells on Amazon for $190. Yours for $140. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic.