Add battery

The battery monitor tracks voltage continuously, alerting you when a battery falls below a safe level or rises above a charging threshold. Useful for house banks, starting batteries, or any DC source up to 30 V.

Uses a battery slot (10–13) on the BRNKL connector.

Prerequisites

• 3 A fuse and inline fuse holder

• Access to the battery positive terminal

• An available BRNKL battery slot (10, 11, 12, or 13)

Wiring

• Run a wire from the positive battery terminal through a 3 A fuse to an available battery slot: 10, 11, 12, or 13.

• Connect the wire unswitched — directly to the battery terminal, not downstream of a switch — so BRNKL can monitor voltage even when other circuits are off.

• The battery negative uses the shared ground; no separate ground wire to the battery slot is needed.

Note which slot you use — you will need it when configuring.

Configure

In the BRNKL app, go to Settings > Devices and select the input matching your slot:

This is a Battery input. Recommended settings:

• Monitor — on

• Alert — on

• Name — e.g., House battery or Start battery

• Low Voltage Alert (V):

  • 12 V system: 11.5 V

  • 24 V system: 23.0 V

• High Voltage Alert (V) — optional, for overvoltage faults:

  • 12 V system: 14.5 V

  • 24 V system: 29.0 V

Tap Save.

Test

1. Wait 15 minutes for settings to sync.

2. Confirm the dashboard tile shows a voltage reading.

3. Using a multimeter, measure voltage directly at the battery terminals and confirm it matches the dashboard reading within 0.2 V.

Troubleshooting

• No voltage reading on dashboard — check the fuse, verify the wire is in the correct battery slot, and confirm Monitor is enabled in the app.

• Reading is significantly off — use Offset Voltage in the app to calibrate. Measure the actual voltage at the terminals and adjust the offset until the dashboard matches.