12v solar panel which 6 watt to 12 watt output is 13 6 to17 volts is enough to charge your 12 volt car battery takes 5 hours to working condition and 25 hours to full charged.
Charging 6 volt battery with 12 volt solar panel.
Will a 12 volt solar panel charge a 12 volt battery.
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45 watts 17 volts 2 65 amps.
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With a simple pwm 6 volt charge controller or a direct connected panel charging a 6 volt battery will reduce the panel s wattage by about 1 2.
The 12v model can give an output that will be enough in charging a 12v battery under conditions like high temperature and low light level.
But remember a 12v battery will need at least 13 6v.
To charge a battery with a solar panel connect a charge connector to the solar panel.
For example just guessing on the numbers.
Of course it is not a good idea to charge a battery directly from a solar panel in any case.
Connect charge controller or regulator properly which protects and regulates the charge and prevent over charging discharge of a 12 volt storage battery using solar panels.
Assume 45 watt 12 volt panel actually vmp is 17 volts for the typical panel.
It also means that the solar panel will have an output of 17v or above under perfect conditions.
Divide the wattage of the solar panel by the voltage of the battery to get the number of amps your charge connector needs to handle.
Then run wires from the battery to the charge connector making sure to match the positive and negative poles.
The equation above simply means that your 12 volt battery will be able to deliver 240 watts of power for an hour 120 watts for two hours it may also mean that your battery can provide 2 watts of power for 120 hours it depends on how much power you are using the more power you use the faster your battery will discharge.
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