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Old 12-08-2015, 08:27 AM   #29
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Great detective work!!!



I've also noticed the wiring anomaly, but usually leave it in place, as all of the solar upgrades that I install are more than capable of overcoming any parasitic loads.



I don't see why Airstream would not simply follow Kenwood's directions about this draw (but then they seem to have better ideas about many things!) and not use the chassis battery, since it will connect to the house batteries and recharge anyway (once a power source like solar is present) thru the BIM once the lower voltage threshold is reached.

Right on Lew! Having a capable solar system solves all the shortfalls in the Airstream design.


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Old 12-08-2015, 09:53 AM   #30
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Wonder why the BIM manufacturer would not give your the current draw. I know the wattage needed to hold the relay. It's in the specs for the relay that's used in golf carts. But that's only when activated. The electronics draw very little.

Ahhh! The Kenwood radio is wired to the house batteries for both the ignition and main power requirements. So it never really goes fully into standby like it should since there is alway an ignition signal. Kenwood has internal relays that limit the current draw when the ignition signal is off - but that never happens because of the way it is wired by Airstream.

The BIM is still an issue and I'm working on some ideas to add an indicator light to tell when batteries are connected and add an on/off switch. So many ideas so little time. 😄


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\
http://www.precisioncircuitsinc.com/...nager-RevF.pdf

Well, according to the info from precisioncircuitsinc, the draw seems to be 4Watt if I read this right. (BIM 225A)

"7. Runs Cooler using Less Power
a. 100 F cooler than competition
b. Uses only 4Watts of power versus 25W"

Of this is indeed "constant power use" we are looking at around 0.33A, so close to 0.4A

From this I conclude that the Airstream SB 164 is a fruitless exercise, at least in my case
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Old 12-17-2015, 08:40 PM   #31
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I think the downside for me would be losing the ability to use the Kenwood without the ignition key set to accessory. The upside is obviously less parasitic drain but my unit is generally on the road, plugged in or sitting out in the sun with my 200w solar upgrade providing a charge. I usually have the battery disconnect on so the frige will run and I can set the fantastic fan to come on if it gets too warm inside. Think I'll skip it.
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Old 12-18-2015, 11:26 AM   #32
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The is also a downside to the total disconnect switch I installed. The Kenwood goes to a startup screen when you turn the power back on. Fortunately the settings are saved. Same with the new control for the Magnum inverter - it requires resetting the time each time I turn off the power and then turn it back on. Both are minor inconveniences.


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Old 12-18-2015, 11:42 AM   #33
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The is also a downside to the total disconnect switch I installed. The Kenwood goes to a startup screen when you turn the power back on.
But doesn't that happen anyway if you use the starting battery disconnect down by the accelerator pedal?
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Old 12-18-2015, 11:43 AM   #34
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The is also a downside to the total disconnect switch I installed. The Kenwood goes to a startup screen when you turn the power back on. Fortunately the settings are saved. Same with the new control for the Magnum inverter - it requires resetting the time each time I turn off the power and then turn it back on. Both are minor inconveniences.


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Definitely going to skip this one Mike, in fact just called my dealer and told them to cancel my appointment. Thanks for the input.
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Old 05-01-2016, 05:13 PM   #35
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Reversed SB-164 today. I left the Solenoid in should down the road someone want it. To deactivate the solenoid all you have to do is remove the 5 Amp fuse they install for the SB. I disconnected the wire as well otherwise the red "blown fuse" LED indicates.
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Old 05-02-2016, 12:26 PM   #36
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Why did you disconnect it?
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Old 05-02-2016, 03:31 PM   #37
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Why did you disconnect it?


Net 10+ AH consumption in 24 hours for no good reason when Boon docking.
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Old 05-03-2016, 09:41 PM   #38
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What you guys really need is a big, fat, 800 amp/hour lithium battery sitting in the back of your Interstate. No more worries about parasitic drain!!!
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Old 05-11-2016, 09:32 AM   #39
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Back in January I had the local dealer install the Service Bulletin 164 solenoid. Before that, though, I installed a marine battery shut off switch on the side of the battery box. Since January when storing the van, I have experimented leaving the shut off switch on to see how the voltage would hold up. Of course, getting the batteries fully charged then disconnecting via the switch worked well.

This past weekend we used the van. The batteries had been shut off and the voltage was good. On Sunday I wanted to see the Lightning playoff game against the Islanders. Go Bolts! The inverted wouldn't come on. The display showed "Fault".

Upon getting home I broke out the multimeter and began investigating the problem. The inverter was only getting 5 volts. Then I touched the SB 164 installed solenoid. It was hot as a firecracker. I completely detached the solenoid and all is well again.

Having lots of boats in the past, I am accustomed to turning off the batteries at the disconnect switch. That will be what I'll do from now on. So much for SB 164!
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Old 05-11-2016, 10:01 AM   #40
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I had the same problem with two of their selenoids. The factory for whatever reason insists the selenoid not be removed but replaced. I had mine disconnected and problem fixed. A manual shutoff would be much better
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Old 05-11-2016, 04:12 PM   #41
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From I've heard here SB-164 actually makes things worse. What a lousy job by Airstream!

Simple battery or inverter cutoff switch is best and that's what I installed. With my setup the cutoff switch stops power to inverter and the other items on 12VDC distribution panel, including the thermal circuit breakers. I left the solar and battery isolator (BIM) connected so solar keeps all batteries fully charged when parked in my driveway.


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Old 05-11-2016, 08:19 PM   #42
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I just discovered a more elegant and simple resolution to shutting down the inverter and it is a Magnum option AS could have installed.

"The MM-DCLD (DC Load Disconnect) pigtail adapter is designed to provide a
means to DISABLE the inverter function when a 12 volt DC signal is removed.
This is useful in applications when a vehicle or boat is placed into storage
and the battery disconnect switch is turned off to disconnect all DC loads, the
inverter can also be automatically turned off if the MM-DCLD is installed."
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