So it can take up to 10 hours of solar charging to power a laptop for an hour or so?
150900
Yes 8 or less but if you charge it up at home already then the sun will keep it charged for days as your using it.so be ready have it already charged before you use it. Them the sun will keep it charged for many days.
150901
Yeah that's sounds about right. it take 10 hours to about fully charge the battery unit with solar. the life of the laptop depends on the laptops power settings and what you are doing with it. I most use this device to charge cell phones and cameras etc...
150902
Hi, Just wanted to get back to you... recharge of your Sherpa 50 or 100 or what ever you might be purchasing, recharging the unit depends on the solar panel. I personally bought the goal zero nomad 27 for a faster charge which I can piggy back with the nomad 13 the sherpa 50 came with, so I can get a full recharge on the Sherpa in 2 to 3 hrs. If you go this route, you will need to purchase the goal zero 4.7 to 8mm input cable to connect nomad 27 to Sherpa 50. there are other options for solar panels, but the nomad 27 is light and folds up small for my backpack. Hope this helps you. You can call goal zero directly and they can help you decide what you need. Hi, Just wanted to get back to you... recharge of your Sherpa 50 or 100 or what ever you might be purchasing, recharging the unit depends on the solar panel. I personally bought the goal zero nomad 27 for a faster charge which I can piggy back with the nomad 13 the sherpa 50 came with, so I can get a full recharge on the Sherpa in 2 to 3 hrs. If you go this route, you will need to purchase the goal zero 4.7 to 8mm input cable to connect nomad 27 to Sherpa 50. there are other options for solar panels, but the nomad 27 is light and folds up small for my backpack. Hope this helps you. You can... » Read More Hi, Just wanted to get back to you... recharge of your Sherpa 50 or 100 or what ever you might be purchasing, recharging the unit depends on the solar panel. I personally bought the goal zero nomad 27 for a faster charge which I can piggy back with the nomad 13 the sherpa 50 came with, so I can get a full recharge on the Sherpa in 2 to 3 hrs. If you go this route, you will need to purchase the goal zero 4.7 to 8mm input cable to connect nomad 27 to Sherpa 50. there are other options for solar panels, but the nomad 27 is light and folds up small for my backpack. Hope this helps you. You can call goal zero directly and they can help you decide what you need. « Show Less
150903
Actually less than 10 hours, but you can charge the battery at home and use it later. But you are correct more or less 8 hours
150904
On a good, sunny day it only takes me between 4 and 5 hours to charge my sherpa battery. How long your laptop runs will depend on its battery and what programs you run. I have used the sherpa battery to get a little extra use out of power tools, but in general, I find the Sherpa more suited to charging smaller electronics- a tablet at most.
1478600
Yes we can charge using laptop. But I do not think it is holding the charge too much time .
1916960
I'm not sure, because we use it as a battery backup to our server. The times I've needed it, we've gotten at least 2-3 hours of backup for our server before our electricity came back on.
513970
It would be 2 hours if the laptop was using 65W - chances are that the laptop battery lasts 4 hours because it's using less than 65W - a quick test would be to use the laptop while connected to the charger - if the battery charges up (from not at 100%), then the laptop would be using less than 65W, with the remainder of that going into the battery.
632204
8-12 hrs depending on amount of direct sunlight, but u need to position it correctly ( not a big deal ) as sun moves. USB charging works very well to re-charge ...... its handy given you have off grid capability if required and it does't rain all week LOL
1113702
Assume that you won't be plugging off the laptop. It lasts about an hour or two, but basically assume you need a power brick if you're travelling.
2077217
It appears to charge for about a 2 hour lifespan. But that's how long most of the 6-lithium ion batteries charge for. Most batteries last me 6-12 months before they overheat if you use your laptop frequently
1918626
Depends on the power source, from an ipad charger about 2-3 hours but from a pc or iphone charger about 4-6
2280123
The inverter will do it, but run time is dependent on battery size. I've run my netbook on a car battery for two hours, but I'm careful to run the engine a little afterwards as car batteries don't like being discharged too deeply. If you want to get technical, add your inverter and laptop draw in amps (amps x volts = watts), multiply it by an inefficiency factor (?would have to look that up), and multiply that times the hours used and you have the amp hours your battery will need for that application.
1547202
It depends on how many hours of sun and how long you use your inverter. It is all a matter of Watt-Hours. If you charge your battery for 10 hours with 300 Watts you can use your 3000 Watt inverter for 1 hour. So you see, the answer depends on your application and location.
930352
I would say yes based on a hundred watts per computer. So that would be 10 amps total. I assume this would be for over night charging or a class setting.
1325076
Well if you want it to take an INSANELY long time, at about .... what's the spec for USB? 2.5 watts? yeah that would take way way way too long, probably 7 or more days, 24 hours plugged in. You can go get a 28 watt solar panel ( I learned very recently that if you multiply volts and amps, you get watts, so that's cool) I think this thing takes about 30 watts to charge at it's rated speed, so 2 or 3 watts below that won't hurt anything unless it's like a really critical situation and this is desperately needed to be charged in that situation, in which case it should have already been charged prior to this situation! Well if you want it to take an INSANELY long time, at about .... what's the spec for USB? 2.5 watts? yeah that would take way way way too long, probably 7 or more days, 24 hours plugged in. You can go get a 28 watt solar panel ( I learned very recently that if you multiply volts and amps, you get watts, so that's cool) I think this thing takes about 30 watts to charge at it's rated speed, so 2 or 3 watts below that won't hurt anything unless it's like a really critical situation and this is desperately needed to be charged in that situation, in which case it should have already been charged... » Read More Well if you want it to take an INSANELY long time, at about .... what's the spec for USB? 2.5 watts? yeah that would take way way way too long, probably 7 or more days, 24 hours plugged in. You can go get a 28 watt solar panel ( I learned very recently that if you multiply volts and amps, you get watts, so that's cool) I think this thing takes about 30 watts to charge at it's rated speed, so 2 or 3 watts below that won't hurt anything unless it's like a really critical situation and this is desperately needed to be charged in that situation, in which case it should have already been charged prior to this situation! « Show Less
1062694
Need to let the battery charge up. Leave off and you can use car or computer to charge for a hour.
18874
You should be able to charge it with a solar panel as long as it meets the jumpers charging requirements labeled in the back of jumper. It will run your lap top way more than 2 hours.
1187823
It usually takes around five to ten hours depending on the device that you are trying to charge.
1090210
Yes, but very slowly. For instance, it would take 7 perfect sunny days to charge a car battery sized battery. If you bought 7 panels, then it would do it in a day.
1848173
Perhaps you could clarify your question. This is a Lithium Ion DC storage device which holds 9200 mAhrs of power. It normally charges from an AC wall socket at 120 /240 volts (8-10 hrs). It can also be charged by USB connection to a computer (14-20 hrs, depending on the type of USB (3.0 is faster than 2.5). It can also use an included 5w solar panel, which takes about 20 hrs. There's no magic here -- the more watts you put in, the faster it charges. Connecting it to a car's 12v jack via a USB adapter would take about 16 hrs to charge. Most importantly, though, as a Lithium ion device, it's designed to have power flowing in and out all the time. When hiking or camping, we just let it charge on the solar panel during daylight, whether it needs it or not.