I need to charge 7.2v 1120mAh batteires away from a power source and looking for a solar solution. In perfect condions what are my charge time?
1083905
i can take a guess. i have never come across an 1120amp/Hr battery before, unles you have a few in parale. you will need more than 12 volts, about 13 to charge that battery. most likelly about 12 hours with no load on the battery. you'll need a solar panel that's over 140 watts to charge those battery's. hope this helps. GOOD LUCK .:-)
1083906
These work well on boats and keep my 12v batteries charged. I have had problems with the unit's surface film degrading (although it kept charging) but the company was very prompt about giving me free replacement. If they don't roll up easily from the outset they never will and tend to crease.
1220389
Yes, You should put a charge controller in line to batteries, rated at the proper amps/watts so you don't overcharge batt.
1275226
Adapter supplies 250ma. so 700MAH batteries should take about 3 hours to charge, after the initial charge of about 5hrs.
1123835
I agree with most all said here before. Get 2 12v batteries in series = 24v, or 4 6v and hook up in series but controller is best way to go to match your solar panel. Most quality solar panels will charge 12v and 24v. Get a volt meter and check it out as you go. A fuse is a must. Good luck
232356
The safest way for both your equipment and your battery is to always use a charge controller. We have about 20 of these panels in use with MPPT type charge controllers purchased off eBay for about $10 each and they work great. These panels won't, however, keep up with a very big electric load. We use 9 amp-hour batteries with a continuous load of just under 100 milliamps, and with these solar panels our load stays powered an average of 12 hours per day (which is all we need). It's important to do the math to properly match your load requirements with a large enough solar panel, battery and charge controller. The safest way for both your equipment and your battery is to always use a charge controller. We have about 20 of these panels in use with MPPT type charge controllers purchased off eBay for about $10 each and they work great. These panels won't, however, keep up with a very big electric load. We use 9 amp-hour batteries with a continuous load of just under 100 milliamps, and with these solar panels our load stays powered an average of 12 hours per day (which is all we need). It's important to do the math to properly match your load requirements with a large enough solar panel, battery and... » Read More The safest way for both your equipment and your battery is to always use a charge controller. We have about 20 of these panels in use with MPPT type charge controllers purchased off eBay for about $10 each and they work great. These panels won't, however, keep up with a very big electric load. We use 9 amp-hour batteries with a continuous load of just under 100 milliamps, and with these solar panels our load stays powered an average of 12 hours per day (which is all we need). It's important to do the math to properly match your load requirements with a large enough solar panel, battery and charge controller. « Show Less
1092318
4 AA 2500mAh batteries in 5 hours so 4 x2000 in 4 hours or 500 ma per hour. Won't make any difference what your charging source is, it only draws 500 ma
1783343
Solar panels are like generators, not batteries. The panels have dual usb output connectors. You can charge an external battery that has usb or microusb input with the proper cables. Expect to get about 1.2-2.0 amps of charge rate with direct sunlight and a favorable angle (if the sun is low in the sky you will lose charge efficiency) two items will charge at a lesser rate. An Anker® 2nd Gen Astro3 12000mAh (4A Output) Portable Charger will charge at roughly 1.3 amps by itself. That will get 20-25% charge capacity of that external unit every 90-120 minutes of quality sunlight.
218201
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
1157688
Hi Gregory! I just asked the question of the best "proven" way to charge these batts and I'm convinced by the majority of answers is to use the USB end and keep the mAh's the same 1 thru 5, of course. It will take longer, but successful all around, as many have said and I tend to agree. Some have used, me included, a 3.7V wall charger, but I don't feel any longer. I hope that this helps and puts your mind at ease as it does mine!&#128522;
1783344
Anker makes some fairly nice USB batteries that you can buy on Amazon for under $50. You could use one of those batteries with the solar array and have power left three days later.
1512722
Theoretically 125 ah/9.2 amps x 19.5v/12v hours. However, you should never draw a battery below about 50%, so divide that by 2 . There are also efficiency losses. You are looking at something over 6 hours. If you draw the battery to 0 you will destroy the battery much more quickly. I use AIMS pure sine wave converters available from them or Amazon. American made quality. Keep the battery charged when not being used.
637232
12 volt battery would be ok. If the source is solar, be sure it really is no more than 12 volts. Many solar charging setups for 12 volt batteries could put out as much as 17 volts.
1578093
Basically I got very sparse directionsMyself. These type batteries should not be charged over 8 hours. Will possibly overheat. Recharge when they go dim. I never need to use full power as housing gets very hot. Do not leave light connected to battery as small led in switch will run down battery. Hope this helped. Lee R
1229304
Also, make sure you remove the plastic over the solar panels, otherwise it wont charge as well. I leave mine inside my truck on the dash and it charges in 6 hours.
990636
Battery in question is 100ah x12v = 1200 watt hours. This panel can provide 144 watts per hour for battery charging purpose. Rule of thumb batteries should not be drained more then 50% or maximum 80% otherwise battery life will be compromised, so we will consider 600 watts to be charged. 600 watts divide by 144 watts = 4.16 hours. Since this panel is 24 volt and your battery is 12v - MPPT charge controller is highly recommended. MPPT charge controller can accept higher voltage (24~36 volt) from the solar panel and charges a lower voltage battery (such as 12v). Morningstar SS-MPPT-15L will be a good charge controller for this setup. Battery in question is 100ah x12v = 1200 watt hours. This panel can provide 144 watts per hour for battery charging purpose. Rule of thumb batteries should not be drained more then 50% or maximum 80% otherwise battery life will be compromised, so we will consider 600 watts to be charged. 600 watts divide by 144 watts = 4.16 hours. Since this panel is 24 volt and your battery is 12v - MPPT charge controller is highly recommended. MPPT charge controller can accept higher voltage (24~36 volt) from the solar panel and charges a lower voltage battery (such as 12v). Morningstar SS-MPPT-15L will... » Read More Battery in question is 100ah x12v = 1200 watt hours. This panel can provide 144 watts per hour for battery charging purpose. Rule of thumb batteries should not be drained more then 50% or maximum 80% otherwise battery life will be compromised, so we will consider 600 watts to be charged. 600 watts divide by 144 watts = 4.16 hours. Since this panel is 24 volt and your battery is 12v - MPPT charge controller is highly recommended. MPPT charge controller can accept higher voltage (24~36 volt) from the solar panel and charges a lower voltage battery (such as 12v). Morningstar SS-MPPT-15L will be a good charge controller for this setup. « Show Less
1114501
IM sorry, I've never timed the charging time, but do remember it drove me crazy figuring out how to mount in base to charge.
1855639
Hey Edwars O. Not sure. What type/sort of system are you putting together? 6V 12V? What are you needing to run, and for how long? What are your energy needs? I can't answer your question my friend without more info. I personally use the 400 watt system with another 100 watt panel. I match my batt bank so every 100 watt of solar for 100Ah of storage. Yes, it is over kill for just myself! I'm still in the learning processes if you will. The panels that come with this kit have zero issues with charging the batteries on cloudy days. I'm very happy with this basic system so far!!