Charger
Renogy Rover Li 40A wiring diagram
40A MPPT: 520W at 12V / 1040W at 24V and 100V PV limit, with lithium profiles. Bluetooth is external: legacy RS232 models use BT-1; newer RS485 models use BT-2.
- Compatible systems
- 12 V / 24 V
- Rated output
- 40 A
- PV open-circuit limit
- 100 V
Wiring diagram
How the Rover Li 40 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
- 16 mm² · 6 AWG
- Example fuse
- 50 A
- Design current
- 40 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.
Supporting parts
- 6.1 m total of 16 mm² (6 AWG) marine cable
- Terminations for 16 mm² cable, matched to the equipment's screw terminals, leads or studs
- 50 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.
Reviewed against manufacturer family documentation (rev. Version 1.3), checked 2026-10-01. Exact variant details still require confirmation. Manufacturer documentation →
Which Rover is covered?
The catalog’s Rover Li 40 A record refers to the RNG-CTRL-RVR40 family. “Li” identifies lithium-capable charging; it does not establish the communication-port generation. These installation notes use the legacy Version 1.3 manual. Its model table confirms 40 A charging, 520 W at 12 V / 1040 W at 24 V, and a 100 V solar open-circuit limit. Check the nameplate and actual connector labels before applying the details below.
How do the terminals map?
Crimp’s PV + / PV − represent the solar pair, and BATT + / BATT − represent the battery pair. The physical LOAD + / LOAD − pair, temperature-sensor connector, and communications port are omitted. LOAD is limited to 20 A, even on the 30 A and 40 A controllers; it is not another output carrying the controller’s full charge rating. Renogy prohibits connecting an inverter or battery charger to LOAD.
Connect the battery before the solar array so the controller can establish its operating voltage. Match the engraved terminal labels; the drawing’s top/bottom arrangement is not the enclosure’s physical layout.
What wiring and protection does the legacy guide specify?
Version 1.3 permits up to 8 AWG / 10 mm² at the power terminals. Its fusing section sets the controller-to-battery fuse equal to the charge-current rating: 40 A for this model. PV protection depends on the array’s short-circuit current and string arrangement; the 40 A charge-output rating does not establish a PV fuse value. Confirm conductor ampacity and voltage drop for the actual route, since the connector’s largest accepted wire is not a cable recommendation for every distance.
Mount the IP32 controller vertically in a dry, ventilated location with 150 mm clearance above and below. Keep it outside a sealed compartment containing flooded batteries.
How do battery settings and Bluetooth differ by generation?
Select the battery type from the battery-voltage screen. In lithium mode, explicitly select 12 V or 24 V and the required charging voltage; do not rely on automatic detection for an over-discharged lithium bank. The legacy Li profile has a 14.4 V default boost setting for a 12.8 V LFP battery, with no float or equalization stage. Match the battery maker’s requirements and do not use the legacy temperature sensor for lithium charging.
Legacy V1.3 uses RS232 with an optional BT-1. The B3 manual describes RS485, and lists BT-2. That newer guide also changes conductor/fuse guidance. Bluetooth is external in both cases: inspect the port and generation before buying a module or mixing installation tables.
Fit check
Connect it to the rest of your system.
Describe your setup to draft a system with Rover Li 40A 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
40A MPPT: 520W at 12V / 1040W at 24V and 100V PV limit, with lithium profiles. Bluetooth is external: legacy RS232 models use BT-1; newer RS485 models use BT-2.
- Compatible systems
- 12 V / 24 V
- Rated output
- 40 A
- Planning charge current
- 40 A
- PV open-circuit limit
- 100 V
Terminal map
Catalog connection points, current direction and planning limits. Check the manufacturer's pinout and connector ratings before installation.
PV +
positive · input
PV −
negative · input
BATT +
positive · output
BATT −
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 Rover Li 40.
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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