VOTRONIC MPPT Duo Digital Charge Controller

1. Introduction

This manual provides detailed instructions for the installation, operation, and maintenance of your VOTRONIC MPPT Duo Digital Charge Controller with LCD Solar Computer S 1250. This effective charger is designed for use in campers, caravans, boats, and with solar collectors, providing clear measurement values for optimal control and utilization of your solar system. The backlit display ensures readability in various lighting conditions.

2. Safety Instructions

Please read these safety instructions carefully before installation and operation. Failure to follow these instructions may result in damage to the device, property, or personal injury.

• Electrical Safety: Always disconnect power before installing or servicing the device. Only qualified personnel should perform electrical connections.
• Ventilation: Ensure adequate ventilation around the unit to prevent overheating.
• Moisture: Do not expose the device to water or excessive moisture.
• Correct Voltage: Ensure the solar panels and battery system voltage match the specifications of the controller.
• Mounting: Mount the device securely on a stable surface, away from flammable materials.

3. Product Overview

The VOTRONIC LCD Solar Computer S 1250 provides comprehensive monitoring of your solar charging system.

3.1. Main Components

Figure 1: Front view of the VOTRONIC LCD Solar Computer S 1250. This image shows the silver-colored display unit with a clear LCD screen displaying "127.5 W" and a "Charge" indicator. Below the screen are three buttons: a down arrow, an up arrow, and a power button with "Reset 3s" text. The unit is labeled "Solar Power" and "Made in Germany".

• LCD Display: Shows current solar power, solar current, battery voltage, solar charging capacity, and total solar energy.
• Control Buttons: Navigate through display modes and reset accumulated values.
• Indicator Light: Flashes in case of undercharge or overcharge conditions.

4. Setup and Installation

The LCD Solar Computer S 1250 is designed for easy integration with VOTRONIC SR and MPP solar controllers (12V and 24V systems).

4.1. Mounting

1. Choose a suitable location for mounting, preferably indoors, away from direct sunlight and moisture. The unit is wall-mountable.
2. Use the provided mounting material to securely fasten the display unit.

4.2. Electrical Connection

1. Ensure all power sources (solar panels, battery) are disconnected before making connections.
2. Connect the LCD Solar Computer S 1250 to your compatible VOTRONIC solar charge controller using the designated connection cable. Refer to your solar controller's manual for specific port locations.
3. Verify all connections are secure and correct polarity is observed.
4. Reconnect power to the battery and then to the solar panels. The display should power on.

5. Operating Instructions

The LCD Solar Computer S 1250 provides real-time data and accumulated values.

5.1. Display Modes

• Current Solar Power (W): Indicated with a bar display for quick monitoring.
• Current Solar Current (A): Shows the amperage being generated by the solar panels.
• Battery Voltage (V): Displays the current voltage of your battery bank.
• Solar Charging Capacity (Ah): Accumulated ampere-hours charged by solar.
• Solar Energy (Wh): Accumulated watt-hours generated by solar.

5.2. Button Functions

• Up/Down Arrows (▲ / ▼): Press to cycle through the different display modes (Current Solar Power, Current Solar Current, Battery Voltage, Solar Charging Capacity, Solar Energy).
• Power Button (█):
  • Short Press: Toggles display backlight on/off.
  • Long Press (approx. 3 seconds): Resets accumulated values (Solar Charging Capacity, Solar Energy).

6. Maintenance

The VOTRONIC LCD Solar Computer S 1250 requires minimal maintenance.

• Cleaning: Wipe the display and casing with a soft, dry cloth. Do not use abrasive cleaners or solvents.
• Connections: Periodically check all electrical connections to ensure they are tight and free from corrosion.
• Environment: Ensure the operating environment remains within specified temperature and humidity ranges.

7. Troubleshooting

If you encounter issues with your LCD Solar Computer S 1250, refer to the table below for common problems and solutions.

8. Specifications

9. Warranty and Support

For warranty information and technical support, please refer to the official VOTRONIC website or contact your authorized dealer. Keep your proof of purchase for warranty claims.

VOTRONIC Official Website: www.votronic.de