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Re: [GMCnet] Power Adapter [message #325601 is a reply to message #325597]

Tue, 31 October 2017 11:09

Justin Brady

Messages: 769
Registered: April 2015
Location: Bell Buckle, TN

Karma:

Senior Member

Peer,
No worries man to each their own, but I can tell you (as someone who has 215AH of battery and 200W of solar) that you're going to struggle with lack of power if you're camping for more than a day or 2 without hookups. To some that doesn't matter, but if you plan to stay for more than a day or so off grid with an electric fridge, coffee maker, vent fans, lights, stereo, tv etc you will not have enough power.

200 watts seems like plenty, but you will only see 200 watts at noon in the summer time( and even then it's really only 170 or so for an hour in my experience). Realistic output mounted on the GMC is more like 75 watts average over the daylight hours. When you consider that an electric fridge is going to pull at least 75 watts, you've only broken even and not charged your batteries. Once you factor in the draw from your inverter for your coffee maker, your cell phone chargers, your vent fans, your water pump and your lights you have actually drained battery even though it's been "charging" all day. So on a good day you hit dark with a 75% charge. When you wake up in the morning you're now down to 50% or less thanks to the fridge running all night. Since you're not really charging during the day you now need to run the generator to boost the batteries so you'll make it to night 2.

If you really want it to work you need more panels and more battery if you want to be all electric.
That's why we went away from electric. The only electric we are pulling is the vent fan, the water pump, and the LED lights. (and an inverter now and then for TV and cell phone chargers). The fridge runs on propane so no draw there, we do cook but it's all propane so no microwave or cooktop to draw power. Even with this arrangement if it's cloudy for a couple of days in a row we need the generator to top up.

With solar anything that is a constant draw is a problem, especially overnight.

Not trying to be dismaying, just trying to help in your planning!

Justin Brady http://www.thegmcrv.com/ 1976 Palm Beach 455

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[Message index]

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		Re: [GMCnet] Power Adapter By: jhbridges on Sun, 29 October 2017 08:44
		Re: [GMCnet] Power Adapter By: JohnL455 on Sun, 29 October 2017 16:13
		Re: [GMCnet] Power Adapter By: JohnL455 on Sun, 29 October 2017 16:19
		Re: [GMCnet] Power Adapter By: USAussie on Sun, 29 October 2017 17:05
		Re: [GMCnet] Power Adapter By: JohnL455 on Sun, 29 October 2017 19:14
		Re: [GMCnet] Power Adapter By: richshoop on Sun, 29 October 2017 19:26
		Re: [GMCnet] Power Adapter By: Justin Brady on Mon, 30 October 2017 08:47
		Re: [GMCnet] Power Adapter By: Olly Schmidt on Mon, 30 October 2017 08:53
		Re: [GMCnet] Power Adapter By: USAussie on Mon, 30 October 2017 08:59
		Re: [GMCnet] Power Adapter By: Justin Brady on Mon, 30 October 2017 09:17
		Re: [GMCnet] Power Adapter By: Olly Schmidt on Mon, 30 October 2017 09:43
		Re: [GMCnet] Power Adapter By: Justin Brady on Mon, 30 October 2017 11:08
		Re: [GMCnet] Power Adapter By: Olly Schmidt on Mon, 30 October 2017 15:01
		Re: [GMCnet] Power Adapter By: johnd01 on Mon, 30 October 2017 15:11
		Re: [GMCnet] Power Adapter By: Olly Schmidt on Mon, 30 October 2017 16:16
		Re: [GMCnet] Power Adapter By: Justin Brady on Mon, 30 October 2017 22:55
		Re: [GMCnet] Power Adapter By: johnd01 on Mon, 30 October 2017 23:22
		Re: [GMCnet] Power Adapter By: USAussie on Tue, 31 October 2017 07:55
		Re: [GMCnet] Power Adapter By: Justin Brady on Tue, 31 October 2017 11:09
		Re: [GMCnet] Power Adapter By: Olly Schmidt on Tue, 31 October 2017 02:58
		Re: [GMCnet] Power Adapter By: JohnL455 on Mon, 30 October 2017 09:23
		Re: [GMCnet] Power Adapter By: k2gkk on Mon, 30 October 2017 11:07
		Re: [GMCnet] Power Adapter By: Ken Burton on Tue, 31 October 2017 01:50
		Re: [GMCnet] Power Adapter By: SteveW on Tue, 31 October 2017 11:34
		Re: [GMCnet] Power Adapter By: Olly Schmidt on Tue, 31 October 2017 11:55
		Re: [GMCnet] Power Adapter By: tphipps on Sat, 04 November 2017 11:37
		Re: [GMCnet] Power Adapter By: USAussie on Sat, 04 November 2017 22:43

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