WATTSTUNDE® 20 A 90 V MPPT solar charge controller WLR-BT 20.90 MPPT 12 / 24 V

MPPT Solar Charge Controller with LCD and Bluetooth Function from WATTSTUNDE®

Generate your own electricity with the advanced MPPT solar charge controller from WATTSTUNDE® – perfect for your motorhome, caravan, boat, and any off-grid solar system!

The MPPT solar charge controller from WATTSTUNDE® is the central component of any solar system, connecting PV modules, consumers, and the solar battery. The innovative MPPT (Maximum Power Point Tracking) technology converts the variable voltage of the solar modules into a constant voltage to charge your battery efficiently and gently. Even in less than optimal lighting conditions, energy generation remains efficient.

The WLR-BT 20.90 from the MPPT series impresses with its new LCD display, which clearly presents a variety of information and measured values. Get precise information on the battery's state of charge or the load current to have a comprehensive overview of your solar system at all times. This allows you to check your system at any time and make adjustments if necessary.

Real-time display of energy flows and a statistics function for viewing total solar yields make the charge controller particularly user-friendly.

The charge controller charges all common battery types (lead-acid, AGM, gel, lithium) quickly and gently. The integrated low-voltage protection prevents dangerous deep discharges of the battery, while the intelligent load disconnection disconnects the connected consumers at a critical battery state of charge.

Maximize your solar yields with the smart MPPT technology of the WLR 20.90 from WATTSTUNDE®. This technology optimizes the operating point of the solar modules multiple times per second and efficiently converts excess voltage into increased charging current. This leads to shorter charging times and maximum power output – with up to 30% more yield compared to conventional PWM charge controllers.

Even in unfavorable lighting conditions, such as overcast skies or diffuse light, the MPPT charge controller achieves considerable energy yields. Automatic detection of the system voltage (12 or 24 V) and an external temperature sensor that adjusts the charging voltage to the ambient temperature ensure optimized charging performance. Overload and overcharge protection, as well as reverse current protection for the solar modules, provide additional safety for your system.

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View data live on your smartphone! With a Bluetooth-enabled smartphone, you can view a lot of data in real time. Use the wireless connection to easily set up, monitor, and update your controller – all conveniently via your Apple or Android smartphone, tablet, or other devices.