Voltage registers are configured in much the same way as power registers (the default register type on the eGauge). To add a voltage register:


Firmware 4.0 and newer


Navigate to Settings -> Installation

Under Registers, click the "Add Registers" button

Name the register as appropriate

Using the dropdown menu, change the register type from "P" to "L"

In the next dropdown menu, select the appropriate voltage reference

In the final dropdown menu, select the measurement type (if in doubt, "normal value" is generally correct)

Click "Save" at the bottom of the page when finished (valid credentials required)





As with all physical registers, data will only start recording from the time the register is created.



It is also possible to set up a formula register to evaluate the difference between two voltage registers. This can be used to trigger an alert, or just to obtain a historical reference.  It is typically not required for the average installation.  To create this register:


Navigate to Settings -> Installation

Under Registers, click the "Add Registers" button

Name the register as appropriate

Using the dropdown menu, change the register type to "="

A second dropdown menu will appear.  Set the unit type to "voltage [V]"

In the formula field, enter the following: abs($"volt_reg_1"-$"volt_reg_2") where volt_reg_1 and volt_reg_2 are the names of voltage registers.  The order does not matter.

Click "Save" at the bottom of the page when finished (valid credentials required)





Legacy (pre firmware 4.0)


Navigate to Settings -> Installation

Under Registers, click the "Add Registers" button

Name the register as appropriate

Using the dropdown menu, change the register type from "P" to "V"

A second dropdown menu will appear.  Select the appropriate voltage reference

Click "Save" at the bottom of the page when finished (valid credentials required)