18V7.5W Solar Car Battery Maintainer Charger

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ALLPOWERS 12V Solar Car Battery Charger is the perfect solution for charging the

batteries of car, motorcycles, automobiles, snowmobiles, tractors and more by solar when

the battery is in the state of losing power and power shortage, maintaining the battery

effect, extending its usage life. Made of durable ABS plastic and sunpower solar cells, this

unit can charge devices in all daylight conditions. Constructed with a built-in blocking

diode to prevent reverse discharge, this sunpower solar panel is easy to install and

completely maintenance-free. Get the ALLPOWERS Solar Car Battery Charger


Easy to use

Just plug this sunpower solar charger into your vehicle's 12-volt lighter socket and position

the panel to pick up the most daylight possible. Or, if you prefer, use the included alligator

clips to connect it directly to the battery. (you can mount this solar power panel on your

windshield with the two suction cups or fix it on the sun visor with the back strips)


* Solar Panel: Sunpower panel 18V7.5W

* No-load voltage: 18-23VDC

* Load voltage: 18V

* Output current: 270-410mAh(0.27A-0.4A)(tested at no-load condition)

* Size: 320x128x4mm/12.6*5.0*0.12inch

* Weight:0.323kg/ 11.4oz/ 0.7lbs


AP-SP18V7.5W(18V7.5W Solar Car Battery Maintainer Charger)--click to expand it
1.Could I connect this to a Charge controller? (Eg this one -
http://www.iallpowers.com/index.php?c=product&id=371) And use it to charge a 12v lithium battery?
If yes ... what connector would I need to connect it to the charge controller?
Yes, you can pair the panel with controller or no controller, that is OK. A panel greater than 15W should chain with a controller to prevent from overcharging issue.
Normally there are 6 screw-down screws for tightening the cable, you need no extra connector actually.
One thing we should remind u first, for lithium battery, please check the manual to select the proper batteries type for pairing the battery system before the operation.
B02=LITHIUM ION 3s 3x3.7V=11.1V
B03= LIFePO4 4s 4x3.2V=12.8V
The default setting on our controller is for lead-acid battery(B01).
2.Is the panel waterproof? Could i hang it on the roof of my mini caravan?
Some raindrop is OK, but the back circuit board is coated with rugged polyester canvas which is same as the coating on most outdoor backpack. (For outdoor use, make sure you have added an protective closer with high light transmittance.)
3.Should I keep it plugged it for day and night?
A blocking diode is included to prevent reverse charging from battery so it is OK to leave it plugged day and night.
However,one thing we need to remind you: pleae do remember to remove/disconnect it before starting you engine or driving every time.
Electrical surges from the car engine when starting and running may damage the diode inside, or you may need to pair your system with a solar regulator to better protect your battery from draining.
Trips: It is suggest to mount the panel on the central of vehicle’s window (Do avoid UV protection area)so that you won’t forget to disconnect/remove it before starting cars.

Product manual download