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Renogy Rover 40A MPPT Charge Controller Review


Charge Controller Today, I will review the Renogy Rover 40A MPPT charge controller. When I compared between PWM and MPPT charge controllers, I mentioned clearly, why I prefer the MPPT over the PWM ones mainly due to their higher efficiency and that with MPPT charge controllers you can charge your batteries faster and you can upgrade your system later.

Brand: Renogy

Part Number: Rover RNG-CTRL-RVR40

Price: $$

Amazon Link: Here

My Rating: 8.5/10


Renogy Rover 40A MPPT Charge Controller Features:
  • MPPT Technology with up to 99% tracking efficiency and 97% peak conversion efficiency.
  • Temperature compensation.
  • Low Voltage Disconnect (LVD) that prevents the battery from over-discharging.
  • Remote temperature sensor for the battery that ensures proper charging and prolongs the battery life.
  • LCD display to view status and adjust parameters.
  • Can be connected to a PC for monitoring and adjusting of parameters through a dedicated software


Renogy Rover 40A MPPT Charge Controller Wiring:

Charge Controller

  • Never connect the solar panel to the charge controller without a battery.
  • Never connect an inverter to the load terminals. If you have an inverter, connect it to the battery itself.
  • Suitable ONLY for sealed lead-acid, flooded and gel batteries.
  • Never install the controller in a sealed enclosure with the battery.
  • Make sure there is enough ventilation around the battery to release the gases.
  • Temperature sensor polarity does NOT matter.
  • Maximum input voltage is 100Vdc (which is the Voc of the PV panel).
  • Maximum input current is 40A (which is the Isc of the PV panel).


Renogy Rover 40A MPPT Charge Controller Pros and Cons:


  • MPPT technology
  • Big LCD screen and LED indicators.
  • Temperature compensation which prolongs the system life
  • Can be connected to a PC for monitoring and parameters changing.


  • No USB sockets
  • Overcurrent protection is very sensitive; it may be triggered because of the inrush current of the connected loads. You can solve this by adding an inrush current limiter in series with the output.


Charge Controller


Renogy Rover 40A MPPT Charge Controller Troubleshooting:

Q: PV panel indicator is off during daytime.
A: that means there is no charging current coming from the PV panels, make sure that the PV wires are connected properly to the charge controller and use a multi-meter to verify the polarity of the terminals.

Q: PV panel indicator is double flashing.
A: That means the charging is very slow, make sure that the there are no shades that block the sunlight from the PV panels.

Q: Battery indicator is slowly flashing.
A: Battery is over-discharged. Disconnect the loads and let the PV panels charge the battery. Use a multi-meter to frequently check the battery voltage and see if it increases over time (or connect the charge controller to a PC and monitor the battery voltage through it).

Q: Battery indicator is rapidly flashing.
A: Battery over-voltage. Use a multi-meter and make sure that the battery voltage is not over 32V.

Q: Load indicator is rapidly flashing.
A: That means either an overload or a short circuit. Make sure that the load terminals are properly connected to the controller and use a multi-meter to ensure that the load current does not exceed 20A.


Renogy Rover 40A MPPT Charge Controller Error Codes:
Error Code Description
E0 No error detected
E1 Battery over-discharged
E2 Battery over-voltage
E3 Battery under-voltage
E4 Load short circuit
E5 Overload
E6 Controller over-heated
E8 PV input over-current
E10  PV over-voltage
E13  PV reverse polarity


Renogy Rover 40A MPPT Charge Controller Technical Specifications:
Specification Value
Rated battery current 40A
Battery Voltage 12/24V (auto)
Rated load current 20A
Self-Consumption ≤ 100mA @ 12V

≤ 58mA @ 24V

Max PV Input Power 520W (12V), 1040W (24V)
Max PV Input Voltage < 100V DC
Charge circuit voltage drop ≤ 0.26V
Discharge circuit voltage drop ≤ 0.15V
Temperature compensation -3mV/°C/2V
Communication interface RS232
High Voltage Disconnect 16V
Equalization voltage 14.6-14.8V
Boost Voltage 14.2-14.6V
Float Voltage 13.8V
Boost Return Voltage 13.2V
Low Voltage Reconnect 12.6V
Under-voltage warning 12V
Low voltage Disconnect 11.0V
Discharge limit Voltage 10.6V
Equalization Duration 2 hours (when applicable)
Boost duration 2 hours (when applicable)
Protection Over-current

Short Circuit

Reverse Polarity





LED Display Status, data

Mode switching

Parameter configuration

Working Temperature -31 to 113°F

-35 to 45°C

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Size 9.37 x 6.81 x 2.58in
Max terminal size 8 AWG
Weight 4.41 lb


Disclaimer: The above guidelines for installation are provided in good faith to help you with the installation. The author shall not be held responsible for purchase or installation actions taken or not taken. There are many details of installation that are assumed to be general knowledge to experienced installers which are not included in the post. These installation guidelines are intended to be strictly recommendations and are not to serve as a step-by-step, fail-safe installation checklist. Selection of an experienced installer is the sole responsibility of the project owner or project manager.

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