How fast would it take to use up charge in 12 volt battery in my scamp charging lap t - Page 3 - Fiberglass RV


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Old 02-15-2014, 10:09 PM   #29
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During Christmas I saw some solar chargers at Lowe's.There was different ones for lap tops,cell phones and tablets. I did not get one but I should have,just to have if we lose power during hurricane season. My kids all say they work and are a good thing to have on hand. DD and her husband did rim to rim at Grand Canyon and carried those small battier back ups for their cell phones & GPS device.
Maybe something like the solar charger for just your lap top is what you need. This is just one that I found on Google when I typed in solar charger for lap top..........7 Portable Solar Laptop Chargers Worth Considering : TreeHugger

Good luck and Happy Camping
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Old 02-15-2014, 10:15 PM   #30
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If I were off-gridding in February in a climate like Indiana's, I'd be a lot more concerned about power reserves for the heater fan etc. than I would about recharging a computer.

Assuming the O.P.'s late-model Scamp has the usual power users such as fridge, lights, pump, and most especially a furnace with a fan, the best that can be expected in the life-and-comfort sustaining department from a single twelve volt battery is three days, tops.
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Old 02-16-2014, 07:59 AM   #31
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This wont fix all the problems but it is a good start for the price! http://www.goalzero.com/ has a nice line and is sold by Costco and Amazon.

Amazon has the Anker 14W Solar Panel Foldable Dual-Port Solar Charger on sale for $59.99 - $12.00 coupon code "VD2O67XS" = $47.99 with free shipping.

Review: 4.6/5 stars based on 66 customer reviews.

Product deets:
  • 14W Mono-Crystalline 15-18% efficient solar array procudes up to 5V / 2A total output among two(2) USB ports.
  • Compatible w/ 5V USB-Charged devices includeing: GPS units, iPhones, iPads, Android phones and Android Tablets.
  • Hardened PET plastic faced solar panels sewn into high-wear polyester canvas for weather-resistant outdoor durability.
  • Fold down into a 8.5-in. x 11-in. paper-sized profile for superior portability; well placed eyeholes enable easy attachment to backpacks for use while hiking.
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Old 02-16-2014, 08:23 AM   #32
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Agree it probable wouldn't draw it down much, although I know that on one my vehicles the 12v sockets for gadget charging doesn't work unless the car is running though.
Our Honda has an accessory position on the ignition switch, one click before the run position to power up the radio and 12 volt outlet. Cars have had this feature since the 60's, but usually the accessory position was to counter clockwise from the off position. Odd that manufacturers would eliminate this feature on some models. I still drive a couple vehicles that the ACC position is to the left and doors have to be unlocked with a key, no remote, 4 vehicles actually!
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Old 02-16-2014, 10:25 AM   #33
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Well as I said I was running off car but my iPad tajes four hours to recharge so not a minimal timeframe. I am now looking at buying a solar 16 watt portable charger for 130-150$. I don't need to run tv or AC or even coffee pot as my main constant is the IT device for my writing. Charging my iPhone with a very good lighter charger was okay - an hour to two maybe. Charging all three devices could run into 6 or more hours.
Please don't spend that much on a solar panel! Last spring I bought a 75W panel for about $100 and a Morningstar SG-4 controller for $28, from solarblvd.com. I just looked and I see they have a 20W for $29 and a 40W for $54. The SG-4 would work with either of those, too.

I then bought a short extension cord and cut it in half, and wired one end of the cut cord to the panel's wires and the other end to the controller's input wires. The 3 prong plugs can be connected easily at the campsite, or I can add an extension cord of any desired length in between those plugs to get the panel into full sun. On the controller's output wires, I added a 7 pin receptacle just like the one on the back of the tow vehicle; so the trailer's pigtail plugs in there and it charges the trailer battery. It was really easy!

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Wire a 12v 'cigarette lighter' style socket into your trailer interior wiring (my trailer already had one), and you are set to plug in your inverter.

Or if you prefer to use the panel to recharge your tug's battery (or to connect directly to your trailer battery, for that matter), add alligator clips onto the controller's output wires instead of the 7 pin receptacle. Open the hood, connect to battery terminals.
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Old 02-16-2014, 10:32 AM   #34
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Roy, this sounds like a neat gadget. Amazon dot come has 209,047 results for "portable battery pack" -- any particular suggestions/is there one you recommend for camping applications?
Personally, I thought about a battery pack but then realized, I already have 2 batteries (trailer and tug), so why buy another one? Just another that would need replacement in 4-5 years when it won't hold a good charge any more.
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Old 02-16-2014, 10:34 AM   #35
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Originally Posted by Lynn Musgrave View Post
During Christmas I saw some solar chargers at Lowe's.There was different ones for lap tops,cell phones and tablets. I did not get one but I should have,just to have if we lose power during hurricane season. My kids all say they work and are a good thing to have on hand. DD and her husband did rim to rim at Grand Canyon and carried those small battier back ups for their cell phones & GPS device.
Maybe something like the solar charger for just your lap top is what you need. This is just one that I found on Google when I typed in solar charger for lap top..........7 Portable Solar Laptop Chargers Worth Considering : TreeHugger

Good luck and Happy Camping
Jumpin' Jehoshaphat, those are expensive!!!
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Old 02-16-2014, 10:44 AM   #36
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Don't overlook Harbor Freight. They don't have the top of the line in solar panels but since the price keeps on dropping on solar it would be a good start without putting a hole in your pocket.
13 Watt Briefcase Solar Charger
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Old 02-16-2014, 11:34 AM   #37
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I already have 2 batteries (trailer and tug), so why buy another one?
For us, 2 main reasons.
We keep it plugged in at home during the winter for boosts on the really cold days. Seems our neighbours need it more than us.

Secondly, we use it to power the Endless Breeze Fan to keep the dogs cooler in their crates on those really hot days in the summer. Particularily useful at dog events when you are separated from the trailer or tug. Sometimes us humans use it too.

Keeping the electronics charged is a bonus.
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Old 02-16-2014, 12:50 PM   #38
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Our Honda has an accessory position on the ignition switch, one click before the run position to power up the radio and 12 volt outlet. Cars have had this feature since the 60's, but usually the accessory position was to counter clockwise from the off position.
Yup very true all my older vehicles would do that including one made by the same manufacture, which only had one 12v plug. But the newer model (2 years old) with a designated plug with the USB plug for charging gadgets doesn't work that way - vehicle has to be running or nothing. Actually had to check the owners manual out to confirm that as I was also surprised. Perhaps they believe some gadgets take more power than we think to recharge and perhaps they are protecting he battery from draw down... not sure why the change.
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Old 02-16-2014, 01:27 PM   #39
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the USB plug for charging gadgets doesn't work that way - vehicle has to be running or nothing. ... not sure why the change.
Could it be that it takes power to drop from 12 to 5V ? A constant on might be a constant drain.
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Old 02-16-2014, 07:31 PM   #40
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Jumpin' Jehoshaphat, those are expensive!!!

Sorry,didn't look at the price....just picked the first one on the list The ones I saw during Christmas were all a price I could afford to pay for a just encase something. I know there are better prices out there,just had hopes of giving you some good ideas.

Good luck on your hunt for power,I see you have been given some very good ides of places to look.
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Old 02-17-2014, 10:13 AM   #41
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Originally Posted by Roy in TO View Post
Could it be that it takes power to drop from 12 to 5V ? A constant on might be a constant drain.
As said Roy I don't really have a clue as to why the one 12v USB plug designed for recharging the phones, iPods etc it will not work unless the vehicle is actually running. I do wonder if it has something to do with the total draw when the ignition is set to only auxiliary position as described above. Many of the newer vehicles have built in alarms, GPS, hands free/blue tooth and video touch screens for the radio etc. Perhaps allowing phones and iPads etc to charge when all of those are already on is just to much drain.
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Old 02-17-2014, 11:58 AM   #42
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I have a 100w's of solar panels, mounted on the top of my camper,and during my last time in Quartzside I would charge (phone turned off) first thing in the morning and it took about 45 minutes to fully charge, then hooked my computer up and it took about 1.5 hours to charge. By noon the trailers batteries were fully charged. I very happy with rig I installed.
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