VCC 1212-30 CI (3360)
Votronic VCC 1212-30 CI wiring diagram
Non-isolated 12V-to-12V booster with 30A output, a 20A limit setting and 39A maximum input. Article 3360 uses D+ or voltage activation and the included temperature sensor; its CI manual differs from the older 3324 VCC 1212-30.
- Nominal voltage
- 12 V
- Compatible systems
- 12 V
- Continuous draw
- 39 A
Wiring diagram
How the VCC 1212-30 CI 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.
The 3.048 m example runs use 16 mm², with 50 A protection at the starter-battery positive and 40 A at the house-battery positive. These choices follow Table 1 for the VCC 1212-30 CI, article 3360. Select the appropriate standard, EBL or existing-relay wiring scheme and configure charging and D+ control from the manual; the example does not simulate those controls. Manufacturer installation manual
Edit this wiring exampleCable 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.
10 ft one way
12 V system
- Wire
- 6 AWG · 16 mm²
- Example fuse
- 40 A
- Design current
- 30 A
- Voltage drop
- 1.7%
Sized against ABYC E-11. The design current is the unit's rated output. 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.
The 3.048 m example runs use 16 mm², with 50 A protection at the starter-battery positive and 40 A at the house-battery positive. These choices follow Table 1 for the VCC 1212-30 CI, article 3360. Select the appropriate standard, EBL or existing-relay wiring scheme and configure charging and D+ control from the manual; the example does not simulate those controls. Manufacturer installation manual
Supporting parts
- 20 ft total of 6 AWG (16 mm²) marine cable
- Terminations for 6 AWG cable, matched to the equipment's screw terminals, leads or studs
- 40 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. VCC 1212-30 CI article 3360; German April 2026 manual), checked 2026-10-01. Manufacturer documentation →
Which VCC version is this?
This is VCC 1212-30 CI, article 3360, not the earlier 3324 VCC 1212-30. The current manufacturer specification identifies a non-isolated 12 V booster with 30 A maximum output, a 20 A limit setting and 39 A maximum input.
How are power and protection arranged?
START + / IN − connect to the starter supply; BORD + / OUT − connect to the house system. The negatives are not galvanically isolated. If a shunt is fitted, bring system returns to its system side. Manual page 2 specifies 50 A input and 40 A output fuses, with 6, 10 or 16 mm² conductors according to its length table. Power-terminal torque is 1.2 Nm, small control terminals 0.5 Nm.
What must be configured?
Select the house-battery program before charging and install the supplied temperature sensor. D+ permits engine-controlled activation; leaving D+ open invokes voltage-based activation. Use the manual’s EBL/EVS diagram when integrating an existing electrical block: the extra starter-sensing terminal is not another high-current charger output.
What should commissioning prove?
Mount near the house bank with 10 cm clear ventilation space. Confirm charging starts with the intended engine signal and stops appropriately. Check battery-terminal voltage under load as well as indicator lights. The manual describes a small reverse maintenance-charge path, which some EBL configurations disable. Its behavior and lithium low-temperature handling must be checked against the CI instructions rather than an older VCC manual.
Technical reference
Specifications and terminal map.
Check the model, ratings and connection points against your own unit before choosing installation hardware.
Catalog specification
Non-isolated 12V-to-12V booster with 30A output, a 20A limit setting and 39A maximum input. Article 3360 uses D+ or voltage activation and the included temperature sensor; its CI manual differs from the older 3324 VCC 1212-30.
- Nominal voltage
- 12 V
- Compatible systems
- 12 V
- Continuous draw
- 39 A
- Rated output
- 30 A
Terminal map
Catalog connection points, current direction and planning limits. Check the manufacturer's pinout and connector ratings before installation.
START +
positive · input
IN −
negative · input
BORD +
positive · output
OUT −
negative · output
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 — the US reference, and what Transport Canada accepts as an alternative to TP 1332 for pleasure craft under 24 m. 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 VCC 1212-30 CI.
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