Charger

Genasun GV-10-Li-14.2V wiring diagram

140 W recommended PV / 10.5 A MPPT with fixed 14.2 V lithium charging. Requires a compatible four-cell LiFePO4 battery with protective BMS.

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Compatible systems: 12 V
Rated output: 10.5 A
PV open-circuit limit: 34 V

Wiring diagram

How the GV-10-Li-14.2V 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.

Genasun GV-10-Li-14.2V wiring example with 3 components: Reference PV, GV-10-Li-14.2V, House bank. 4 cable connections. Crossings are not junctions.Red = positive · dark = return · dashed = signal. Cable labels are example values; use the equipment instructions and actual installation lengths.

Fixed 14.2 V lithium controller requires compatible 4S BMS. Max 10.5 A, 34 V cold PV Voc; terminals accept no more than 10 AWG/about 5 mm². Internal 20 A fuse is NOT an external battery-cable fuse specification. Leave automatic external cable/fuse choice subject to actual terminal area and battery protection review. Manufacturer installation manual

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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.

1 m one way

12 V system

Wire: 1.5 mm² · 16 AWG
Example fuse: 15 A
Design current: 10.5 A
Voltage drop: 2.0%

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.

Show sizes in AWG

Supporting parts

2 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
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. GV-10 manual rev 4.1, 2021–2022), checked 2026-10-01. Manufacturer documentation →

Match the fixed lithium profile

GV-10-Li-14.2V is the 14.2 V lithium version, intended for a compatible four-cell LiFePO4 battery. It differs from the lead-acid GV-10 and its charging controls. The battery needs balancing and a BMS that disconnects charging outside its permitted voltage, current and temperature limits. The controller's voltage regulation does not replace those battery protections. See battery and terminal requirements, PDF p. 3.

Size the panel by voltage and current

The manual recommends up to 140 W of PV, with 10.5 A maximum panel short-circuit current and 10.5 A charging output. Absolute PV open-circuit voltage is 34 V; the recommended STC limit is 27 V to leave cold-weather headroom. Check the module's actual temperature coefficient instead of relying on its nominal “12 V” description. See electrical specifications, PDF p. 7.

Four wires and separate loads

PV positive/negative connect to the panel pair; battery positive/negative to the output pair. Panel and battery negatives are internally common. The terminals accept up to 10 AWG, approximately 5 mm², with 0.79 Nm tightening torque. Connect loads to a separately protected battery distribution circuit: GV-10 has no load output or low-voltage load disconnect. Do not short the PV terminals while connected.

Protection and first start

The internal 20 A ATO fuse is a service item; it is not a prescribed external battery-cable fuse. Add battery-end protection chosen for the actual wire and installation. The manufacturer recommends connecting the panel first, then the battery, while permitting the reverse order. Verify the LED indication and measured battery charging voltage against the lithium profile, and check that the battery BMS can stop charging. See connection sequence, PDF p. 5.

Technical reference

Specifications and terminal map.

Check the model, ratings and connection points against your own unit before choosing installation hardware.

Catalog specification

140 W recommended PV / 10.5 A MPPT with fixed 14.2 V lithium charging. Requires a compatible four-cell LiFePO4 battery with protective BMS.

Compatible systems: 12 V
Rated output: 10.5 A
PV open-circuit limit: 34 V

Terminal map

Catalog connection points, current direction and planning limits. Check the manufacturer's pinout and connector ratings before installation.

TerminalPolarityRoleLimit

PV +

positive · input

positiveinput10.5 A

PV −

negative · input

negativeinput10.5 A

BATTERY +

positive · output

positiveoutput10.5 A

BATTERY −

negative · output

negativeoutput10.5 A

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.

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