Approximately how long does it take to charge a 12 volt battery in good sunlight, say a 35amp hour battery.
1747855
You did not mention the application, but more is better. There are many variables. Where you live, altitude, how discharged is the battery. A 15 watt panel puts out about 1 amp so you you need approximately 35 hours to deliver 35 amp hours of energy. If you have any two(volts, amps, watts) you can find the third. VxA=W or W/V=A or W/A=V It would be enough to run a couple LED lights, charge your phone, or run the computer for a few hours everyday.
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...
556556
The solar cells provide a charge to the lithium ion battery in the radio, and should take about 24 hours of direct sunlight exposure for a full charge. How many days that ends up being would depend on how many hours of sun you get per day-
912120
50 watts from this unit is assuming a bright sunny day. However, a 12V / 9Amp Hour battery should be able to fully charge during the day....This will give you 3-4 hours running your 3x10 watt lamps during the night. Make sure you connect your battery to the Solar Panel via a charge regulator.
2014762
With just one Panel in this kit of 100W it takes a couple days to fully charge my Vmaxtanks Vmaxslr125 AGM Deep Cycle 12v 125ah SLA rechargeable Battery. That is without the even having the inverter connected as it still usws a bit of power while connected.
2284815
You are more likely to over charge the battery with a 12 volt unit. Just ensure the whole solar array is in the sunlight for optimal charging.
1212180
This is really a small 12V battery in an easy-to-carry case. You charge it's battery first, then carry it to where-ever needed. When you connect it to another battery, I think of that almost like connecting 2 buckets of water together and watching the levels equalize between them. How much each ends up with depends on the sizes of each and although neither one will be totally empty, neither one ends up "full" from that. If you were to have this connected to another battery and plug in the charger, power will go to both batteries. Just realize that the "charger" probably only gives you 1/2 amp of power at 12V where it can take 12 hours just to charge the this little battery if drained, so connecting a car size battery could take 3-4 days to get charged from that. If you don't mind that time range it takes, it will work, otherwise to charge a car battery in under 12 hours will require a "car charger" labeled at least "5 amp" output or more.
218199
Charging time will depend on several factors... how sunny it is, how much capacity (rated in Amp Hours) your battery has, etc. The R15-300 produces 0.3A (at 15V) to charge a 12V battery. For example... If your battery capacity is 10AHr (amp-hours) and it's down to 70% full, that means you need to add 3 AHr back in... As this panel produces 0.3A, that means in 10 hours of full sunlight (max sun) you will restore the depleted 3Ahr. Of course, the sun intensity isn't always at max strength, so it would actually take longer than that. If you need to recharge faster, then a larger panel will be needed. I hope this helps explain it. Pat Charging time will depend on several factors... how sunny it is, how much capacity (rated in Amp Hours) your battery has, etc. The R15-300 produces 0.3A (at 15V) to charge a 12V battery. For example... If your battery capacity is 10AHr (amp-hours) and it's down to 70% full, that means you need to add 3 AHr back in... As this panel produces 0.3A, that means in 10 hours of full sunlight (max sun) you will restore the depleted 3Ahr. Of course, the sun intensity isn't always at max strength, so it would actually take longer than that. If you need to recharge faster, then a larger... » Read More Charging time will depend on several factors... how sunny it is, how much capacity (rated in Amp Hours) your battery has, etc. The R15-300 produces 0.3A (at 15V) to charge a 12V battery. For example... If your battery capacity is 10AHr (amp-hours) and it's down to 70% full, that means you need to add 3 AHr back in... As this panel produces 0.3A, that means in 10 hours of full sunlight (max sun) you will restore the depleted 3Ahr. Of course, the sun intensity isn't always at max strength, so it would actually take longer than that. If you need to recharge faster, then a larger panel will be needed. I hope this helps explain it. Pat « Show Less
1428953
From 0 -100% on the trickle charge it would take about 35 hours. On the 12 amp setting probably 16 hours.
2284640
Hi there - yes to both. If you plug it into a computer it will charge a little faster than if you place it in sunlight. You'll need to give it at least 12 hours of constant charge at first...
1524534
It took approximately seven hours to charge two Nitecore 18650 batteries. I charge the batteries on a 30 day schedule and it takes anywhere from 45 minutes to an hour to bring both batteries up the full charge
1005265
12 volts generating 5 watts is about .4 amps. So, it would take 9 amp-hours / .4 amps = 22.5 hours to fully charge the battery (in a perfect world, anyway). Or in other terms, your battery has a theoretical capacity of 108 watt-hours (12 volts x 9 amp-hours) and the panel charges it at 5 watt-hours per hour. This -should- meet your needs, but I have no idea how much juice your LED light takes. Once you determine that, you should be able to figure it out. Note that you do not want to discharge your UPS battery all the way as this reduces its life. So, you will really only have some fraction of that total energy available for regular use. 12 volts generating 5 watts is about .4 amps. So, it would take 9 amp-hours / .4 amps = 22.5 hours to fully charge the battery (in a perfect world, anyway). Or in other terms, your battery has a theoretical capacity of 108 watt-hours (12 volts x 9 amp-hours) and the panel charges it at 5 watt-hours per hour. This -should- meet your needs, but I have no idea how much juice your LED light takes. Once you determine that, you should be able to figure it out. Note that you do not want to discharge your UPS battery all the way as this reduces its life. So, you will really only have some fraction... » Read More 12 volts generating 5 watts is about .4 amps. So, it would take 9 amp-hours / .4 amps = 22.5 hours to fully charge the battery (in a perfect world, anyway). Or in other terms, your battery has a theoretical capacity of 108 watt-hours (12 volts x 9 amp-hours) and the panel charges it at 5 watt-hours per hour. This -should- meet your needs, but I have no idea how much juice your LED light takes. Once you determine that, you should be able to figure it out. Note that you do not want to discharge your UPS battery all the way as this reduces its life. So, you will really only have some fraction of that total energy available for regular use. « Show Less
314116
My current charger (output of 600 mAh) charges my battery in about 3 to 3.5 hours; this charger has an output of 350 mAh, therefore I would expect this charger to completely charge your battery in about 5.5 hours.
317017
Amp hours are a measure of power. Theoretically, the battery should provide 125 amps for one hour at the stated 12 volts. However, at this high a current, I wouldn't count on it. More realistically, the battery should provide 10 amps at 12 volts for 12.5 hours or 20 amps for 6.25 hours...and so on and so forth. My experience is limited because I use them (two of them) along with an inverter to run a refrigerator and a few other pieces of equipment in a back up mode. They have done great when I've needed them!
1068815
Depends on weather conditions. Windy weather requires more power and more power requires more battery. I would say the average time per battery is 12-15 minutes.
1720758
As the others said, it varies.But in my experience, on 200 mA it charges the fastest batteries in about four hours, and my oldest batteries take around 24 hours.
2069243
Only if it is12v led. The battery is pretty stout, but you only have 12 ah (amps per hour). With that said you will have to calculate the rate it will drain the battery.DC watts to amps calculation formulaThe current I in amps (A) is equal to the power P in watts (W), divided by the voltage V in volts (V):I(A) = P(W) / V(V)So amps are equal to watts divided by volts.amp = watt / volt12 = 144w / 12vMax run time on a perfect charge/battery 12 hrs.