Solar Converters Shunt Battery Charger 12V, 2A

Solar Converters Inc.
PWM SHUNT CONTROLLERS
Battery Chargers

Basic Operation

A major source of noise interference in PWM systems is the sharp voltage and current transisitons that happen when the Series PWM switch very quickly connects and disconnects the panel current to the battery to control the charge. Add a large panel and long panel wires and you have a perfect antennae to transmit all this electrical noise being created.

This basic charge controller charges the battery by connecting the solar panels to the battery then shorts the panel (no power loss when shorted) and reconnects the panel to battery with PWM control. The battery sees a PWM style charge current with PWM control, however, since the panel current shorted is very close to panel current into the battery, there are no sharp transistions of panel current, hence minimal electrical interference.

Application

• A basic battery charge controller. This unit emphasizes extremely low cost and minumum interference.

Features

• No sharp current transition = very low interference
• Supports many battery types, adjustable float voltage
• Charge and Full LED indicators
• Highly stable and accurate voltage and temperature sensor, accurate over the full temperature range
• EXTREMELY low nighttime draw