Using solar panels with the output power of 20w or higher with batteries always requires a charge regulator.
Best regulator solar panel.
Solarepic mppt 40a solar charge controller amazon link is a compact charge regulator for all your standalone solar systems.
20a solar charge controller solar panel battery intelligent regulator with dual usb port 12v 24v pwm auto paremeter adjustable lcd display 4 2 out of 5 stars 551 14 99 14.
It can handle plenty of current from the solar panels up to 100a and charge high voltage batteries as well up to 48v.
The epever 100a solar charge controller from the tracer 10420an series is perfect for large solar systems at home or an institution.
They have become the industry standard the minimum you find even in cheap solar panel kits.
In older systems the pwm or pulse width modulated systems are extremely common.
Typically small 10w solar modules can be used for trickle charging of large batteries without a solar charge regulator if the panels are equipped with blocking diodes to prevent reverse current.
It is an advanced solar system power regulator with the mppt technology.
High tracking and conversion efficiency.
I love this solar voltage regulator because it features pulse width modulated pwm and separates the three ports to help you to connect the cables easily and check your.
The mppt solar charge controller determines the best working amperage and voltage of the solar panel array and matches this to the battery bank.