I want to use this item to charge an extra battery (for my power inverter) can I use it? how long it takes to charge the battery from 0?
1606650
It will NOT charge a battery from zero. If the battery is in good condition, and fully charged, the solar "tender" will keep it topped off.
1606651
This works as a battery maintainer, not a battery charger. If you want to charge a battery for a power inverter, you need a much larger solar panel. To put this in perspective, this provides around 2.5 watts maximum. The 12v power plug in most cars is capable of more than 100 watts. I have mine attached to a deep cycle RV battery and it will barely maintain the charge, even with the battery disconnected fro the trailer.
1606652
This works as a battery maintainer, not a battery charger. If you want to charge a battery for a power inverter, you need a much larger solar panel. To put this in perspective, this provides around 2.5 watts maximum. The 12v power plug in most cars is capable of more than 100 watts.I have mine attached to a deep cycle RV battery and it will barely maintain the charge, even with the battery disconnected fro the trailer.
2088335
I use my charge controller with a 12 volt converter, but I think you can put as much power in as you want,and that it will charge a 24 volt battery bank.Since I have 12 volt converter, I had to put all my 12 volt batteries in parallel, so as not to go above 12 volts and exceed the converters volts
2154616
I don't know. I don't have such an inverter. I seriously doubt that the battery would produce many watts for very long anyway.
138162
I wouldn't use an inverter for something like that. Most charging systems on vehicles aren't large enough to keep up with something like that. Occasionally for a few minutes would be ok just not continuous.
993786
I used this for charging a smaller battery, a motorcycle battery, and discharging into a power inverter for landscape lights at nights. If you are going to maintain the battery without loads then yes I would say. It only produces 10 watts.
1994265
The battery in packs like this have a rating like "18 amp-hour" hinting it can supply 1 amp (at 12V) for 18 hours, or 2 amps for 9 hours, etc. Running the inverter will use a bit of energy itself, otherwise it just transforms the power to 120V where something needing 1 amp at 120V needs 10 amps at 12V (since both of those =120watts). I don't know exactly what your blue ray player or such uses, so the only way to know for sure is to measure them in use with something like the "kill-a-watt" meter. I doubt they need much energy, so if it's under 1 amp at 120V the battery should last at least 2 hours, but that's a guess.
340532
Yes you could use it to charge batteries, though I would look for something cheaper that provides less power. This device supplies way more than you need.
687595
You are mixing watt hours with milli amp hours in your question. If the battery is made for the product it should work okay. The current rating of the battery is not very critical. If the new battery is of a higher current rating it will take a bit longer to charge.
546066
Normally this kind of chargers use pulsating voltage, so if you dont use a prper instrument, you wont see it. And really take a chair, it takes a lot of time to charge a battery 16-24 hrs to char a 12v 7ah
881417
In theory you can, but its not recommended and the NEC wouldn't approve. If you want to connect a 12 V battery to an inverter (to make it act as a power source) then look for an off-grid power inverter instead. They can come in 12V, 24V, 48V configurations.
1269797
No, connect it to your 12v Battery that powers your invertor. I use this on mine it works amazing!
576776
In general, you can get an approximate time for charging anything from zero by dividing the mAh rating by 1000 and then dividing that by the amp rating of the charger. So in this case, you get 50,000/1000 = 50, which you then divide by the recommended 2A charger, and you get 25 hours. I'd add about 10% to cover efficiency losses, too. (This also means that using a 1A charger would require over two days to complete a charge.) Those who claim it can be charged in two hours are wrong. You'd need a 25A charger to do that, which don't exist for USB. You'd destroy the batteries anyway.
1749674
The battery in this (and others that are a similar price) is rated "18 amp-hour" hinting it can give you 1 amp for 18 hours, or 2 amps for 9 hours, etc. For running something needing 120V power off the inverter, if the TV or laptop needed 1 amp at 120V the inverter would pull 10 amps at 12V making the battery last under 2 hours. If the TV only needs 1/2 amp it may last ~3 hours, so it depends on what the TV needs to run (where measuring your TVs power draw with a meter like the "Kill-a-watt" may be the only way to know). If you find it only lasts 1 hour and you wanted it to last 3, then you could get another battery rated 35 amp-hour, connect it up with the jumper cables and they will "share" the load making it last longer.
1157682
If you plan to use this with an inverter attached to the solar charge controller, the amount of current being drawn from the battery is dependent on the solar charger and the inverter. the solar charge cotroller i use does not allow for more than 20 to 25 amps (300 ac watts). If you run the inverter directly off of the battery, you can use larger wattage inverters. The simplest way to use these panels is to hook them to the solar charge controller and hook the batteries up to the charge controller. Then hook the inverter of your choice up to the batteries. I use a 2000w samlex sine wave inverter. This covers refrigeration and recharging sensitive products. If you plan on running these to your electrical panel, you need an electrician to figure that out. I used these panels for my solar generator project. They worked great. The 2 panels combined give you about 10 DC amps of continuous power (about 120 watts of continous power). Without getting technical, It would take about 8-10 hours to charge a 100 amp hr deep cycle battery. How long that battery lasts depends on how much power you draw. Definitely can't run central Air conditioner with 120V. You can run a fan, lights, refrigeration. Your limitation will be the alternate current 120V inverter and the max continous wattage.
1901563
Yes, I bought it originally because of my battery bank is also 24 Volt. This is ok. But I cant actually recommend this device. I bought it not only for inverter-function but also for charging and bypassing when generator comes into game. The last two, charging and bypassing, did never work out. I don't know if I got it already defect by bad luck or if it is just low quality.
2094783
I wouldn't use this charger for a battery that size. It would probably take at least 24hrs to charge it. I would look for a charger that's at around a 2-5amp charger. This would be a good alternative for just a little increase in price.... Schumacher XM1-5 1.5 Amp Fully Automatic Power Charger and Maintainer
2282993
The question posted by Barbara Kennedy was "how fast does it work?". This is a battery maintainer or float charger. It is not suitable for recharging a depleted or drained battery so charge time is not normally discussed relative to this product. If you need a proper battery charger there are many better suited to the task than this product which is aimed at keeping full charge in a battery that is used in a vehicle which is not frequently used.