Use the Go Power model 82958 / GP-BMK-25 to identify the shunt and remote display in an RV battery compartment. A correctly positioned shunt measures current moving into and out of the battery bank; wiring around it can make state-of-charge readings unreliable.
Follow B− and P− before installing a monitor
Trace the negative lead from the battery to the shunt first. The B− terminal faces the battery; the P− terminal serves the RV's loads and charging equipment. Nothing else should bypass the shunt at the battery-negative post.
What comes with the 82958 monitor?
The monitor is a complete wired battery-measurement package. It combines a display, an external current shunt and a fused positive-sense connection. It does not charge the battery or replace inverter overcurrent protection.
| Included component | What it does |
|---|---|
| GP-BMK-25 display | Backlit flush-mount screen for state of charge, voltage, current, remaining capacity and time estimates |
| 500A/50mV shunt | Installs on battery-negative circuit between battery (B−) and system returns (P−) |
| Fused B+ sense lead | Connects battery positive to the shunt's low-current B+ terminal, using the specified protection |
| Shielded display cable | Links the shunt and remote display; follow the included kit's actual cable length |
| Shunt mounting bracket | Holds the current-measurement shunt securely near the battery |
After installation, enter the battery bank's capacity and synchronize the state-of-charge reading according to Go Power's instructions. Supported battery types include lithium, AGM, gel and flooded lead-acid. The display can also show an additional battery's voltage where configured.
Make sure you choose the right monitoring system
Do not confuse the older standalone BMK-25 display with a Go Power PowerTrak 83457 or 84025 touchscreen. The connectors, system architecture and battery-data hardware differ. A matching-looking screen is not proof of interchangeability.
Matching product images and other monitoring options
Select the photograph matching the manufacturer's identification on your unit. The PowerTrak kit and Renogy option are separate monitoring systems shown to help distinguish them from the BMK-25.
Go Power original wiring illustration
The manufacturer manual includes the actual battery, shunt, solar controller and inverter wiring view under Installation — Wiring Diagram. Follow that drawing and the supplied wiring instructions for connection details and mounting.
View the factory GP-BMK-25 wiring drawing (manual PDF) · Go Power GP-BMK-25 specifications