The diagram shows a typical iv curve for a 60w solar panel which plots the behaviour of its voltage horizontal axis and current vertical axis left.
Solar panel voltage regulator 24v.
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If the floating stage is not reached the solar charge controller has a voltage limit value and will be not charge if the battery voltage reaches to 14 4 volts or 14 5 volts.
The solar generated voltage of a 12v dc solar panel should be higher in order to be able to charge the battery and it is about 17 18v.
Features dual usb ports for 12 volts 24v volts with a rated charge and discharge current of 30 amps.
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Over 4 000 000 off grid solar products deployed globally since 1993.
The blue line also shows power output in watts vertical axis right.
Maybe they re implying on the box that you d use this panel in conjunction with a nominal 24v storage system but that would require a separate mppt charger module.
Most 12 volt panels put out about 16 to 20 volts so if there is no regulation the batteries will be damaged from overcharging.
It regulates the voltage and current coming from the solar panels going to the battery.
A charge controller or charge regulator is basically a voltage and or current regulator to keep batteries from overcharging.
In doing so the battery pulls the solar panel down to its voltage let s take a typical 12 5 volts for the battery voltage.