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Connecting External Solar Charger to SLA power board

Q: We need more (battery) power after expanding the Data Logger with a few extra sensors. Is it possible to use the original SLA power board in conjunction with the new External Solar Charger instead of replacing the SLA board for a DC power board?

A: yes, it can be done, connect the external charger as shown.

Original lay-out: SLA board ”IN” is connected to the Solar Cell, “BATTERY” to the battery. The SLA board is regulating and protecting the 12V output power, Solar Cell and Battery. The white “OUT” terminal is delivering regulated 3.6V power for the Data Logger and Sensor.

Board Lay-out:

  1. Solar Cell Input. (Use a 36 cell Solar Panel).
  2. Main Fuse. (Fast acting, 2A).
  3. Charge Indicator. (Green).
  4. Unregulated “BATTERY” output and monitor pin. (Green).
  5. 3.6V output terminal (White). Regulated power to the Data Logger.
  6. Battery Fuse (4A, fast acting).
  7. Battery “IN” terminal.
  8. Battery full indicator. (Orange).

After extending  the Data Logger with a few extra sensors, the power need has increased. When using a External Solar Charger to match the new power needs, connect the External Solar Charger Output to the “BATTERY” terminal on the SLA board. DO NOT USE the “IN” terminal. The external Solar Charger is protecting the Solar Cells and Battery. The SLA Board is only protecting and regulating the “OUT” terminal. The white “OUT” terminal is delivering regulated 3.6V power for the Data Logger and Sensors.

Board Lay-out:

  1. Solar Cell Input. (Use a 36 cell Solar Panel).
  2. Main Fuse. (Fast acting, 2A).
  3. Charge Indicator. (Green).
  4. Unregulated “BATTERY” output and monitor pin. (Green).
  5. 3.6V output terminal (White). Regulated power to the Data Logger.
  6. Battery Fuse (4A, fast acting).
  7. Battery “IN” terminal.
  8. Battery full indicator. (Orange).

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