Hi all, we have a Sportsmobile built on a 2019 Ford Transit. It's great, but one persistent problem has been a possible "parasitic load" on the Ford engine battery that causes the battery to be dead after sitting in the driveway for a week or two. Our engine battery is AGM rated at 720 CCA.
To deal with this, 6 months ago we had an engine battery disconnect switch installed by a local Ford dealership service department. Although I asked them to install a Blue Sea switch, they instead installed a cheap one (https://www.autozone.com/ignition/ki...tch/422687_0_0
). It worked fine for awhile -- we switch it off when we get home from a trip, and it has kept our engine battery from draining while the van sits unused for a few days or weeks.
But this week the disconnect switch quit working -- that is, turning the switch to "OFF" doesn't disconnect the engine. Weird and worrisome, since it might also fail to connect someday, leaving us stranded in the boonies somewhere. I'm also concerned this indicates the switch is not adequate for the load; it appears the cheap switch is only rated at 700 amps maximum, 20 less than our battery's CCA rating (thanks, Ford dealership ). Maybe this could even be a fire hazard?
Anyway, I'm planning to buy a better quality switch and have it installed by a marine electronics specialist. I'm thinking of this "Blue Sea" e-series model: https://www.bluesea.com/products/900...Battery_Switch
Anyone have experience with this cutoff switch, with engine battery disconnect switches in general for the Ford Transit, or this one in particular? (I have already reviewed the other thread on this topic, )
and it didn't help me much.)
Also, might the cutoff switch also serve as a theft deterrent if we got one with a removable knob? Blue Sea doesn't sell an e-series switch with a removable knob, but they do sell a lower-rated m-series switch with a removable key: https://www.bluesea.com/products/600...with_Key_-_Red
. However I would worry that its amperage rating (300A continuous, 500A intermittent, 900A cranking) might be a bit low.
Thanks much for your thoughts, SMB friends!