Monitoring
Victron Smart Battery Sense wiring diagram
Battery voltage and temperature sender for compatible Victron chargers using a VE.Smart Bluetooth network. Mounts on the battery case with fused battery leads; does not measure current or state of charge and is not a VE.Bus inverter/charger sensor.
- Continuous draw
- 0 A
Wiring diagram
How the Battery Sense is wired.
Open this example in Crimp to use your own parts and cable lengths. Review the assumptions and installation notes as you adapt the circuit.
Cable sizing for this example
Use the diagram as a starting point for your installation. Replace the example equipment and cable lengths with your own, and check the connections against your exact model's instructions.
3 m one way
12 V system
- Wire
- 1.5 mm² · 16 AWG
- Example fuse
- 1 A
- Design current
- 0.0 A
- Voltage drop
- 0.0%
Sized against ABYC E-11. The design current is the part's continuous draw. The length is one way; voltage drop includes an equal-length return.
Run-length and manufacturer assumptions
The editable example uses 3.048 m (10 ft) runs unless a shorter run is stated. Metric overviews round these to 3 m. Adapt the parts and lengths to your installation before choosing cable and protection.
Supporting parts
- 6.1 m total of 1.5 mm² (16 AWG) marine cable
- Terminations for 1.5 mm² cable, matched to the equipment's screw terminals, leads or studs
- 1 A fuse and holder on the positive run
- Heat-shrink, strain relief and terminal boots sized to the cable
Check stud sizes, fuse type, run length and how warm the space gets against the gear you actually have before you order.
Installation notes
Before you install.
Open a question for model-specific guidance and sources.
Verified against the manufacturer's documentation (rev. 02 - 05/2023), checked 2026-10-01. Manufacturer documentation →
What does Smart Battery Sense measure?
Smart Battery Sense sends battery voltage and case temperature to compatible chargers through a VE.Smart Bluetooth network. It does not measure current, calculate state of charge or act as a BMS. It is not a temperature-sensor input for VE.Bus inverter/chargers. Check the charger's VE.Smart compatibility and the network's chosen voltage/temperature source before installation.
Where does the sensor mount?
Attach the sensor body directly to the battery case with its adhesive backing so its temperature reading represents the battery. Connect the two eyelets to the corresponding battery terminals. The supplied leads are 45 cm long with M10 eyelets; if extended, the manual requires the same or a larger conductor cross-section. Support the wiring and retain the supplied T1A 250 V fuse.
Its operating range is 8–60 V, with 65 V an absolute maximum rather than a normal operating target. The ambient range is −10 to +60 °C. For a bank with several batteries, follow the manufacturer's mounting arrangement and remember that one sensor measures one location, not the temperature of every cell.
How is the wireless connection configured?
Use VictronConnect to create or join the intended VE.Smart network, then verify that the compatible charger actually receives the sensor values. Pairing a phone to the sensor alone does not establish charger communication. If another monitor already supplies temperature and voltage, review the network rules rather than adding competing measurement sources. The manual specifically discusses systems with GX control and BMV temperature sensing.
What do power draw and LEDs tell you?
At 12 V, the table lists 0.3 mA unconnected, 0.5 mA joining a network and 1.6 mA connected; the catalog uses that connected figure. Blue slow flashing indicates readiness for a phone connection and can coexist with normal VE.Smart transmission. Both LEDs continuously lit indicate a hardware fault; prolonged alternating LEDs indicate firmware update mode. Check the manual's LED table before interpreting a flashing lamp as a lost battery reading.
Fit check
Connect it to the rest of your system.
Describe your setup to draft a system with Smart Battery Sense connected. Review the selected parts and cable lengths, then edit the diagram in Crimp.
The model only picks parts and draws the connections. Every wire size and fuse rating still comes from Crimp's own sizing, never from the model.
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Technical reference
Specifications and terminal map.
Check the model, ratings and connection points against your own unit before choosing installation hardware.
Catalog specification
Battery voltage and temperature sender for compatible Victron chargers using a VE.Smart Bluetooth network. Mounts on the battery case with fused battery leads; does not measure current or state of charge and is not a VE.Bus inverter/charger sensor.
- Continuous draw
- 0 A
Terminal map
Catalog connection points, current direction and planning limits. Check the manufacturer's pinout and connector ratings before installation.
BATT +
positive · input
BATT −
negative · input
Sources and sizing method
Equipment specifications. Model details, ratings and terminal roles come from the catalog. Check your unit’s label and current manufacturer documentation for its exact revision.
Example sizing. Sized against ABYC E-11. Boats built to UK or EU rules answer to ISO 13297 — check these figures against it before you build. Results use the example current and run length shown above. Set your actual equipment, lengths and installation conditions in Crimp before choosing hardware.
Read how the sizing worksNext step
Plan your installation with Battery Sense.
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