Charger
NOCO GENPRO10X2 wiring diagram
Two independent, isolated 12V charging banks, each limited to 10A, from 120–240VAC. Each bank has its own battery mode and supplied 15A inline fuse. The 20A total is not available from one bank; lithium mode requires a battery with a BMS.
- Nominal voltage
- 12 V
- Compatible systems
- 12 V
- Rated output
- 20 A
Wiring diagram
How the GENPRO10X2 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.
This example shows one 10 A charging bank and preserves the supplied 15 A DC lead protection. The second charging bank is independent. The generic drawn cable length is a planning assumption, not the length or a replacement specification for NOCO's supplied leads; follow its extension and connection instructions. Configure each bank for its own battery chemistry. 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.
3 m one way
12 V system
- Wire
- 4 mm² · 11 AWG
- Example fuse
- 15 A
- Design current
- 10 A
- Voltage drop
- 2.2%
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.
This example shows one 10 A charging bank and preserves the supplied 15 A DC lead protection. The second charging bank is independent. The generic drawn cable length is a planning assumption, not the length or a replacement specification for NOCO's supplied leads; follow its extension and connection instructions. Configure each bank for its own battery chemistry. Manufacturer installation manual
Supporting parts
- 6.1 m total of 4 mm² (11 AWG) marine cable
- Terminations for 4 mm² cable, matched to the equipment's screw terminals, leads or studs
- 15 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. GENPRO Series NA User Guide 10.30.2024A; GENPRO10X2 column), checked 2026-10-01. Manufacturer documentation →
How is its 20 A output divided?
The GENPRO10X2 specification provides two isolated 12 V banks at 10 A each, not one 20 A output. Each bank has its own mode selection and positive/negative lead pair. The catalog records 20 A total with a 10 A limit on each bank; the cable example shows one bank. The AC supply is 120–240 V, 50–60 Hz; do not connect DC batteries to the AC pins.
How are the battery leads connected?
Keep each red/black pair with its intended battery. The supplied DC leads are 14 AWG, with 15 A mini-blade fuses; these fuse values are protection, not charging demand. Follow the user guide for the battery/vehicle grounding arrangement, connect the battery leads before AC, and isolate AC before rearranging batteries. Do not join the two bank outputs merely to obtain more current.
Which mode should be selected?
Set each bank independently for standard 12 V lead-acid, AGM or lithium. Lithium mode requires a battery with a BMS. Repair mode is for appropriate lead-acid batteries and can expose connected equipment to elevated voltage; remove incompatible loads first. Force mode bypasses normal low-voltage detection and should not be a routine response to an unexplained fault.
What should you check if it stays in standby?
Confirm the selected mode, correct polarity, intact inline fuse and sound eyelet connections, then measure battery voltage. The support guide distinguishes standby/low-voltage detection from reverse polarity, excessive voltage and battery failure. IP68 does not remove the need to keep the AC connection safe and dry or to provide a secure, cooled mounting position.
Technical reference
Specifications and terminal map.
Check the model, ratings and connection points against your own unit before choosing installation hardware.
Catalog specification
Two independent, isolated 12V charging banks, each limited to 10A, from 120–240VAC. Each bank has its own battery mode and supplied 15A inline fuse. The 20A total is not available from one bank; lithium mode requires a battery with a BMS.
- Nominal voltage
- 12 V
- Compatible systems
- 12 V
- Rated output
- 20 A
Terminal map
Catalog connection points, current direction and planning limits. Check the manufacturer's pinout and connector ratings before installation.
AC L
neutral · input
AC N
neutral · input
BANK 1 +
positive · output
BANK 1 −
negative · output
BANK 2 +
positive · output
BANK 2 −
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. 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 GENPRO10X2.
Open this example as a new project, or add this component to your existing diagram. Use your equipment and cable lengths to review the sizing.
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