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Victron BlueSolar PWM-Light 12/24V-20A

$60.91 (inc. GST)

Bluesolar PWM-Light 12/24V-20A is a charge controller designed for off-grid solar systems. It regulates the voltage and current from the solar panel to the battery bank to ensure efficient and safe charging. This controller is rated for up to 20 amps and is suitable for both 12V and 24V systems. It features a low voltage disconnect function to protect the battery from over-discharging, and a load output that can be used to power DC loads directly from the battery. The Bluesolar PWM-Light 12/24V-20A is easy to install and operate, and is an affordable option for small to medium-sized solar systems.

SKU: SCC010020020 Categories: ,

Victron Bluesolar light PWM solar controller:

Victron's range of  PWM and MPPT charge controllers are both widely used to charge batteries with solar power.

The PWM controller is in essence a switch that connects a solar array to the battery. The result is that the voltage of the array will be pulled down to near that of the battery.

A PWM controller is not a DC to DC transformer. The PWM controller is a switch which connects the solar panel to the battery. When the switch is closed, the panel and the battery will be at nearly the same voltage. Assuming a discharged battery the initial charge voltage will be around 13 V, and assuming a voltage loss of 0,5 V over the cabling plus controller, the panel will be at Vpwm = 13,5 V.

The voltage will slowly increase with increasing state of charge of the battery. When absorption voltage is reached the PWM controller will start to disconnect and reconnect the panel to prevent overcharge (hence the name: Pulse Width Modulated controller).


- Load output with low battery voltage disconnect function.

- Lighting control function, one timer only.

- Two digit seven segment display for quick and easy setting of the load output functionality, including timer setting.

- Three stage battery charging (bulk, absorption, float), not programmable.

- Load output protected against over load and short circuit.

- Protected against reverse polarity connection of the solar array and/or battery.


Additional information

BlueSolar PWM-Light


Battery Voltage

12/24 V with automatic system voltage detection

Rated charge current


Automatic load disconnect


Maximum solar voltage

28V / 55V (1)


< 10 mA

Load output

Manual control + low voltage disconnect


Battery reversepolarity(fuse) Outputshortcircuit Overtemperature

Overload protection

Shut down after 60 s in case of 130% load

Shut down after 5 s in case of 160% load

Short circuit: immediate shut down


Common positive

Operating temp. range

-20 to +50°C (full load)

Humidity (non-condensing)

Max 95%

Charge voltage 'absorption'

14.2V / 28,4V

Charge voltage 'float'

13.8V / 27,6V

Low voltage load disconnect

11,2V / 22,4V

Low voltage load reconnect

12,6V / 25,2V (manual)

13,1V / 26,2V (automatic)

Protection class


Terminal size

5 mm² / AWG10




Dimensions (h x w x d)

70 x 133 x 33,5 mm (2.8 x 5.3 x 1.3 inch)


IEC 62109-1


EN 61000-6-1, EN 61000-6-3, ISO 7637-2

1) For 12V use 36 cell solar panels For 24V use 72 cell solar panels or 2x 36 cell in series

2) The controller switches to the lower float voltage level 2 hours after the absorption voltage has been reached. Whenever the battery voltage becomes lower than 13V, a new charge cycle is triggered.


Manual-BlueSolar-PWM-Light-12-24V-Charge-Controller-EN-A4Victron BlueSolar PWM-Light 12/24V-20A