Originally Posted by uncle_bob
You can save a little money by going with the 7620 over the 7622. The gotcha is that you then loose the neat yellow switch rotary lockout on the unit. I do indeed like that lockout and have it on the units I bought. Functionally that's the only difference and there is a cost savings involved.
Good idea Bob. But I also like ability to lock out the battery isolator function when performing electrical maintenance. When I rewired my stock BIM I added several features. The attached drawing shows the changes I made to provide remote indications of battery combinations, battery charging meter on driver dash, ability to force a connection (boost) and ability to disable the BIM function.
Some might find this helpful.