Advantages of 12V when you have an inverter? - Page 3 - Escape Trailer Owners Community

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Old 12-14-2014, 06:09 PM   #21
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Originally Posted by LeonW View Post
And the quality of the roadkill just isn't what it used to be.
Use more Ketchup and BBQ sauce

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Old 12-14-2014, 06:11 PM   #22
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we plan quick and easy meals for travel day. Something with just a few minutes of cooking time, like a Caesar salad with grilled chicken. 5 minutes and we are eating.
Us too, sometimes McDonalds is even quicker

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Old 12-15-2014, 01:40 AM   #23
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How much of a hit do batteries take charging an iPad or iPhone

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Originally Posted by hotfishtacos View Post
Here are some examples where extra 12 volt outlets help.
> One under the dinette for charging phones, notepads, etc.
> One near the kitchen for running a 12 volt appliance
> One near the bed for charging phones, notepads, etc. Folks like the phone nearby when sleeping so this helps.
> One near the bed for a 12 volts fan(s) when hot. We use this one a lot.
> One outside to run small lamps or appliances under the awning.

etc, etc..the more the better...
This thread brings up something that I was wondering about as we wait for our trailer build date. We will be using two 6 volt batteries (230 Ah) in our Escape 21. How much would using a 12 volt outlet to charge an iPad or iPhone deplete the battery? My wife's iPad 3 has 11,560 mAh capacity. My iPhone 5 has 1900 may capacity. Being that they run at about 5V, does this mean that in calculating the power drain from the 12 V battery system (two 6 volt; 230 Ah) you can multiply the battery drain by 5/12? Of course when boon docking at remote lakes and recharging with the generator every few days (simultaneously charging Minn Kota battery) we probably never get more than 75% of a full charge. So is the calculation something like:

230 Ah x 12 V - (1.9 Ah x (5 V ÷ 12 V))

This means the drop in Ah would be less than 1 Ah to charge the iPad and not make a big dent on the approximately 175 Ah that would be available while boon docking (230 Ah x 0.75)

I'm not sure if the units are right because A x V = watts, but hopefully someone with more electrical smarts can tell me if this calculation give me the right answer.

Bob K
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Old 12-15-2014, 01:53 AM   #24
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If you want smarts, might not find it here, but re: charging via 12v, my experience with phones and tablets has been an insignificant draw on the battery. Even an xm receiver can go all day and not show any drain. However, and the basis of my question on the efficiency of an inverter, charging just about anything on 110v (like a laptop or the same tablet) using my plug-in inverter results in a much higher draw to the extent I actually avoid using it.
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Old 12-15-2014, 06:50 AM   #25
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Bob,
Here is a good start to your understanding The 12volt Side of Life (Part 1)
part one and two will answer most of your questions. You are on the right track....
also do not forget 12v outlet where the tv will be located.
I have one each in the o/h over the dinette and one each on the bottom sides of dinette and one over the night stand, one under the bed, and finally one over the bed. Seven total
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Old 12-15-2014, 08:07 AM   #26
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Quote:
Originally Posted by Bobbito View Post
This thread brings up something that I was wondering about as we wait for our trailer build date. We will be using two 6 volt batteries (230 Ah) in our Escape 21. How much would using a 12 volt outlet to charge an iPad or iPhone deplete the battery? My wife's iPad 3 has 11,560 mAh capacity. My iPhone 5 has 1900 may capacity. Being that they run at about 5V, does this mean that in calculating the power drain from the 12 V battery system (two 6 volt; 230 Ah) you can multiply the battery drain by 5/12? Of course when boon docking at remote lakes and recharging with the generator every few days (simultaneously charging Minn Kota battery) we probably never get more than 75% of a full charge. So is the calculation something like:

230 Ah x 12 V - (1.9 Ah x (5 V ÷ 12 V))

This means the drop in Ah would be less than 1 Ah to charge the iPad and not make a big dent on the approximately 175 Ah that would be available while boon docking (230 Ah x 0.75)

I'm not sure if the units are right because A x V = watts, but hopefully someone with more electrical smarts can tell me if this calculation give me the right answer.

Bob K
You are basically correct with 1 major issue.

Minor point: I add about 10% for any load which changes/converts/charges for inefficiency.

Major point: Repeatedly discharging batteries deeply and not fully recharging them can shorten their life significantly. Most sources recommend not discharging below 50% on average.

We have solar and can boondock indefinitely in the summer without a generator if we are parked in the sun. (Summer = good sun, no furnace use, LED lights, minimal inverter use) Water and sewer are our limiting factors.

See: Deep Cycle Battery FAQ
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Old 12-15-2014, 08:58 AM   #27
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Hi: Jim Bennett... Here's an easy solution. Add some Johnsonville Brats to a wide mouth thermos leaving a bit of space. Fill with boiling water, seal, and place it in the sink. Ready to eat when you are!!! Pass the mustard and relish. Alf
escape artist N.S. of Lake Erie
I love brats, but they need to be nicely browned on the outside. Usually done over the fire, but nearly as good on the BBQ.
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Us too, sometimes McDonalds is even quicker

Ron
While I have stopped many a time for a quick burger, I have not stopped at Micky D's for way over 10 years. Just don't care for them. Besides, DQ has ice cream.
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Old 12-15-2014, 09:05 AM   #28
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Quote:
Originally Posted by padlin View Post
If anyone runs across a queen size 12v blanket let me know.
Down quilt uses less power I believe.
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Old 12-15-2014, 09:33 AM   #29
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Down quilt uses less power I believe.
We use a down duvet, nice and cozy, and as warm as I would ever want to be, even with the thermostat turned down low (9°C (48°F) is what it is set at for night time). I actually have never used, or even had the desire to use, an electric blanket. Not really sure I would want something like that providing heat under me, as I imagine sweating a lot.

I do have a couple friends that seem to have trouble keeping warm, I wonder if they use them.
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Old 12-15-2014, 10:57 AM   #30
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Leon: I remember that book also--it's called Manifold Destiny--and is still available on Amazon. I own it, but I have to admit, I've never tried it. The concept seems like it would work.
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