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Old 05-10-2018, 07:25 AM   #1
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12-volt outlets with usb

For the 12-volt combination outlets that have usb, I think Escape uses the Magnadyne WC-12V-B. The specs say that this has a parasitic drain of 20 milliamps when nothing is plugged in:

WC-12V Black or White

So 4 of these over 24 hours would draw 20 ma * 4 * 24 hours = 1.9 amp-hours. We're often off-grid, so that seem like a lot.

Thoughts? Has anyone with these outlets added a switch?

It's convenient having usb ports, but my current thinking is to just get the cigarette-lighter 12-volt outlets and use usb adapter plugs.

Bill R
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Old 05-10-2018, 07:59 AM   #2
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WOW
I did not realize they had a standby draw, one more switch mod to add to each.
Also a switch for the co/propane alarm.

The list continues
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Old 05-10-2018, 12:21 PM   #3
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Quote:
Originally Posted by Bill R View Post
For the 12-volt combination outlets that have usb, I think Escape uses the Magnadyne WC-12V-B. The specs say that this has a parasitic drain of 20 milliamps when nothing is plugged in:

So 4 of these over 24 hours would draw 20 ma * 4 * 24 hours = 1.9 amp-hours. We're often off-grid, so that seem like a lot.

Thoughts? Has anyone with these outlets added a switch?

It's convenient having usb ports, but my current thinking is to just get the cigarette-lighter 12-volt outlets and use usb adapter plugs.

Bill R
I went with only one 12v / USB at the dinette area of my 21'. For the other 2 positions I went with standard 12v outlets and planed to add USB adapter plugs to cover the ugly holes. One note: I suspect the parasitic draw is related to the LED light that's included in the 12v/USB outlet assembly. If you use plug in USB units make sure they don't have a built in LED or you'll be back to the same place.
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Old 05-10-2018, 12:27 PM   #4
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We just use a 4-port 12v usb hub when we need charging..
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Old 05-10-2018, 01:11 PM   #5
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I went with only one 12v / USB at the dinette area of my 21'. For the other 2 positions I went with standard 12v outlets and planed to add USB adapter plugs to cover the ugly holes. One note: I suspect the parasitic draw is related to the LED light that's included in the 12v/USB outlet assembly. If you use plug in USB units make sure they don't have a built in LED or you'll be back to the same place.
The 12-volt usb adapters that I own have parasitic current draw even if they don't have a led.

The cigarette-lighter outlets have no battery drain when nothing is plugged in. That's all we had on our 2014 Escape, and we only plugged in the usb adapters when we were charging.

Bill R
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Old 05-10-2018, 01:34 PM   #6
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The 12-volt usb adapters that I own have parasitic current draw even if they don't have a led.

Bill R
Interesting. I suspect the small draw that I will have from the USB adapters will be an issue with me as I usually am not off the grid for 4+ days at a time but I may rethink about when it's better to leave the adapters out. - Thanks Bill
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Old 05-10-2018, 02:07 PM   #7
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I have USB outlets in two locations. Both sets are switched. Greatly prefer "proper" USB outlets than adapters. Don't like cigarette lighter sockets at the best of times.

Ron
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Old 05-10-2018, 05:07 PM   #8
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I have USB outlets in two locations. Both sets are switched. Greatly prefer "proper" USB outlets than adapters. Don't like cigarette lighter sockets at the best of times.

Ron
I didn't think the switch is standard. Did you add the switch? Or is it an Escape secret option?

Thanks,
Bill R
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Old 05-10-2018, 08:52 PM   #9
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Some other power draws that you might find interesting:

80mA -> propane alarm (from spec)
49.8mA -> optional Texas fan when switched on
21.6mA -> Dometic 9500E (electric awning) when idle (measured). 0 when the switch is off
20mA -> USB outlet, including the LED (from spec)
12.8mA -> MaxxFan when switched off (measured)
4mA -> optional Victron Energy battery monitor (spec)
0 mA -> fridge when switched off (measured)
0 mA -> furnace when switched off (measured)

BUT:

800mA -> fridge while running on propane. Quoted from -> http://www.forestriverforums.com/for...ons-25565.html

I didn't see the amperage listed in Dometic's manual, but I found the above link. It probably isn't the same fridge model, but I'm guessing it's in the right ballpark.

If you plan to use your fridge while boondocking, 20mA is a tiny amount compared to 800mA. I wouldn't worry about something that is 1/40 of the biggest draw.

When the trailer is in storage, it probably doesn't matter either because the propane alarm takes more power, so you'll be switching off the main battery if you're worried about running out of power.
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Old 05-11-2018, 12:01 AM   #10
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Originally Posted by Bill R View Post
I didn't think the switch is standard. Did you add the switch? Or is it an Escape secret option?

Thanks,
Bill R
No secret option, I added my own USB outlets.

Ron
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