I know because i blew one up trying to run at full panel wattage of 500 watts on a cold january morning when the output read 37 amps just before it blew.
Step down charge controller.
Compare and select from ti s step down buck controllers featuring non isolated switching voltage regulators that require an external mosfet to set the output current to better optimize efficiency and performance in your design.
So with a pwm controller if the output voltage of the solar array is 24v which can be achieved either by a single 24v solar panel of by two 12v solar panels wired in series the voltage of your battery bank should also be 24v since.
Most pwm charge controllers do not offer such a step down feature.
If the panel v is near or below the battery voltage use a boost controller.
It is a class of switched mode power supply smps typically containing at least two semiconductors a diode and a transistor although modern buck converters frequently replace the diode with a second transistor used for.
I recommend no more than 85 of solar panel hook up to the amp rating of any charge controller.
If you used a cheap chi com or pwm controller you turn your 330 watt panel into a 80 watt panel.
Typically a charge controller enters into a float charge state when the other charge levels of the battery bank has been achieved.
A controller is necessary to convert the panel output voltage v to the v required to charge the battery.
Use this simple part to operate 12 volt led s fans pumps tv s etc.
Wide input voltage range for stepping down battery voltage to operate equipment like our 12 volt dc ceiling fan from a 24 or 48 volt battery bank.
440 watts to a 40 amp charge controller 660 watts to a 60 amp charge controller etc.
Great for golf carts.
If the panel v is above the battery v with a bit of headroom then use a step down controller.
Genasun gvb western wmarine10.
With a 330 wat panel requires at least a 25 amp mppt controller and those will cost at least 200 for a real mppt controler.
When the number of peak sun hours is limited a solar charge controller may not be able to get the battery bank back to the float stage before the.
24v 36v 48v to 12v 3a 36w step down power supply module.
5v regulator drok 5pcs mini voltage reducer dc 4 5 24v 12v 24v step down to 5v buck converter board 3a volt step down transformer power supply module knacro 30a battery charge controller protection switch dc 6v 12v 24v 36v 48v 6v 60v battery protection board for lead acid battery and lithium battery.
There are 2 boost controller options.