WATTSTUNDE® 40 A 150 V MPPT solar charge controller WSL40.150 MPPT 24 / 48 V

MPPT Solar Charge Controller WSL 40.150 with LCD by WATTSTUNDE®

Efficient and fast battery charging for motorhomes, caravans, boats and other off-grid solar systems!

A charge controller is the heart of any off-grid solar system. It charges the battery with solar energy in a controlled manner.

The WSL 40.150 charge controller from the MPPT series was manufactured using all our expertise to develop a cost-effective yet high-performance model. In particular, the commissioning and wide range of solar panels compatible with this charge controller make our WSL 40.150 a beginner-friendly product in the field of large off-grid solar systems.

Our solar charge controller offers you ultra-fast MPPT charging and can thus increase the yield of your solar system. Especially on cloudy days, when the light intensity changes constantly, a fast MPPT controller improves the energy yield compared to PWM charge controllers by up to 30%.

LC Display

The WSL 40.150 from the MPPT series has a built-in LC display that gives you easy access to numerous pieces of information about your solar system. This makes it easy to read the battery charge level or load current without any additional accessories. Accurate measured values allow you to keep an overview of your solar system. The energy flows are displayed in real time, and a statistics function allows you to view the total solar yields over a longer period of time.

Temperature sensor – internal and external

The internal temperature sensor in the WSL 40.150 compensates the float and maintenance voltages based on the temperature. The included external temperature sensor can be easily connected to your WSL as needed. The external sensor allows the charging voltage to be automatically adjusted depending on the ambient temperature.

Maximum yields thanks to intelligent MPPT technology

The WSL-MPPT series by WATTSTUNDE® operates with the Maximum Power Point Tracking principle.
With MPPT technology, the controller determines the optimal operating point of the solar panels multiple times per second.
The WSL 40.150 can thus transform the excess voltage of the solar panels into an increased charging current for the battery. This charging current gain ensures shorter charging times and the best possible performance utilization of the solar system.

System voltage

The WSL 40.150 has automatic system voltage detection. It can be operated at 24 V or 48 V. In addition, there is a day and night timer and a light sensor option.

Comprehensive electronic protection

To prevent problems during the operation of the charge controller, our device offers:
- Overheating protection and load reduction at high temperatures
- Protection against PV short circuit and PV reverse polarity
- PV reverse current protection
- automatic load disconnection in case of impending battery undervoltage (deep discharge protection)

Cooling through metal fins

The WSL 40.150 stands out with a massive metal housing with integrated cooling fins. The cooling fins enable easy mounting and are manufactured from high-quality material according to industrial standards.

Intelligent load disconnection

The WSL reliably and gently charges the battery and protects it from dangerous deep discharge by automatically disconnecting its consumers using the intelligent load disconnection when the battery reaches a critical state of charge.

Conclusion: Our WSL 40.150 is thus the all-rounder among charge controllers for large off-grid solar systems.

Technical data WSL 40.150 MPPT