WATTSTUNDE® 20A 90V MPPT Solar Charge Controller WLR-BT 20.90 MPPT 12/24V

MPPT solar charge controller with LCD and Bluetooth function from WATTSTUNDE®

Generate your own power 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 element of any solar system, connecting PV modules, loads, and solar batteries. With innovative MPPT (Maximum Power Point Tracking) technology, the variable voltage of the solar modules is converted into a constant voltage to charge your battery efficiently and gently. Even under 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 wide range of information and measured values. Get precise information about the battery charge level or load current, giving you a comprehensive overview of your solar system at all times. This allows you to check your system at any time and make adjustments as needed.

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

The charge controller charges all common battery types (lead-acid, AGM, gel, and lithium) quickly and gently. The integrated undervoltage protection prevents dangerous deep discharges, while the intelligent load cutoff disconnects the connected devices when the battery's charge level reaches critical levels.

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 several times per second and efficiently converts excess voltage into increased charging current. This results in shorter charging times and maximum power output – with up to 30% higher yield compared to conventional PWM charge controllers.

Even under unfavorable lighting conditions, such as overcast skies or diffused light, the MPPT charge controller achieves impressive 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 security for your system.

Highlights:

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