Smart Battery Power Controller SBPC-01 is developed for maximum utilization of solar energy generated by solar panels. The controller is designed for solar installations that include batteries for storing the produced energy. After charging the batteries, the energy produced by the solar panels is redirected to consumers connected to the installation. The device has three outputs with different priority that can control up to three separate consumers. Output 1 has the highest priority and Output 3 has the lowest. When the intensity of sunlight is strong enough, the device turns on all three consumers controlled respectively by Output 1, Output 2 and Output 3. When the energy generated by the solar panels decreases, the consumers with a lower priority are turned off sequentially, until a balance between produced and consumed is obtained energy.
The outputs are relay contacts that are designed to control external power relays or contactors that are matched to the power of the controlled load. This makes the device universal, giving it the ability to control both consumers operating on direct current (directly from the battery supply) and operating on alternating current (using an inverter).
For example, the SBPC-01 controller can be used to control both halves of a 12 volt hot water heater. The two halves of the heater are connected (via additional power relays) to Output 1 and Output 2 respectively. To Output 3 (via an additional power relay or contactor), an additional 230VAC consumer can be connected (additional boiler, sea water purifier or another consumer). If the intensity of the sunshine is strong enough, the water heater and the additional consumer operating at 230V will be switched on. When the energy generated by the solar panels decreases, the 230V consumer (connected to Output 3) will be turned off. With a subsequent reduction in the energy produced, the second half of the boiler heater (connected to Outlet 2) will also be switched off. Thus, although with less power (with only the first half of the heater connected to Outlet 1), the water in the boiler will continue to be heated. In this way, optimization of the use of the energy produced by the solar panels is achieved.
The SBPC-01 controller monitors the battery charge level by measuring its voltage. The measured voltage is visualized on the built-in display. The controller’s operating mode settings can be made via the controller’s keyboard so that it can work with different types of batteries. The controller also has an additional input to which the output voltage from the solar panel can be connected. Through this input, the controller determines whether the solar panel is active (day) or passive (night). When the solar panel is passive (at night), outputs 1 to 3 are disabled (consumers connected to them are turned off).
