Renogy Rover Li 40A MPPT Charge Controller

4th of 8 we've scored in Charge Controllers

4th of 8 in Controllers

Renogy Rover Li 40A MPPT Charge Controller

Name: Renogy Rover Li 40A MPPT Charge Controller
Brand: Renogy
SKU: RNG-CTRL-RVR40

SVT Score, Mid

5.9

Usability5.4/10Social6.3/10The SVT Score is placed on its category's range

Versus

5.4

SVT SCORESRead review

A 40 A, 12/24 V MPPT controller with 98 percent peak conversion, load terminals and a 3-year warranty.

$206

Buy Now

We may earn a commission if you buy through this link. It never affects our scores. How this works

SKU: RNG-CTRL-RVR40 Category: Charge Controllers Brand: Renogy

Usability

5.4 out of 10

Capacity6.0

Its 40 A rated charge current sits on the 40 to 49 A rung, so it scores 6 on capacity.

Efficiency8.0

Renogy rates its peak conversion efficiency at 98 percent, so it scores 8 on efficiency.

Operating Range5.0

Its PV input accepts up to 100 V open-circuit, the typical 100 to 149 V rung, so it scores 5 on operating range.

Features6.0

Bluetooth comes only through the add-on BT-2 module, for half points, and it has a user-set lithium profile, an included battery temperature sensor and a load output but no synced parallel operation, four of seven points, so it scores 6 on features.

Verification4.0

Intertek's directory records the RNG-CTRL-RVR40 only as a Recognized Component to CSA C22.2 No. 107.1 and UL 458, a part meant to go inside a listed product rather than a listing of the controller as sold, so it scores 4 on verification.

Better on verificationRenogy Rover 60A MPPT Solar Charge ControllerIntertek's directory lists the RNG-CTRL-RVR60 to UL 1741. $399.99Scores 8.0

Warranty & Support4.0

Renogy's product page and its warranty schedule both give 3 years for materials and workmanship, so it scores 4 on warranty and support.

Warranty and returns

Renogy sets warranty terms by model, for the original buyer only, and takes unused renogy.com orders back within 30 days, lithium batteries within 7.

Price

$205.99 at renogy.com.

Summary

A 40 A controller with A screen

The RNG-CTRL-RVR40 is Renogy's Rover Li 40 A MPPT charge controller for 12 V and 24 V battery banks, with an LCD and load terminals.

Verdict

It suits a buyer who runs up to 520 W of panels on 12 V or 1040 W on 24 V and is content to read the screen on the unit, and who will not need Bluetooth without an add-on or several controllers working in sync.

Strengths

98 percent peak conversion efficiency by Renogy
3 years on both the product page and the warranty schedule
DC load terminals rated 20 A
Battery temperature sensor included
User mode sets custom lithium charge voltages

Show 1 moreShow fewer

Drawbacks

Bluetooth needs the add-on BT-2 module
No synced parallel operation stated
IP32 enclosure
Renogy recommends under 95 V open-circuit in cold weather against the 100 V limit
Rated to 113 °F45 °C

Show 1 moreShow fewer

Social score

6.3 out of 10

RedditProduct-line5.0 out of 10

In r/SolarDIY an owner of a Rover 40A on two 100 W panels found charging stopped after heavy cloud and came back only when he reset the PV breaker, and a later reply reported the same fault on a Rover 20A (June 2026). In an r/SolarDIY thread weighing the Rover Li 40A against a Victron SmartSolar 100/50, an owner running two Rover 40s and a Rover Lite 60 called the install very easy, while most replies favored the Victron and one called Renogy cheap but well short of its quality (February 2026).

GoogleProduct-line7.0 out of 10

Footprint Hero, which bought the Rover 40A with its own money but links it through Amazon and Renogy's affiliate program, named it the budget pick of five MPPT controllers it tested, with 142 W peak from a 200 W array against 146 W from a Victron SmartSolar 100/30 and a 0.175 V average voltage error, fourth of five (February 2023). On DIY Solar Forum an owner running a Rover 40 and a Rover 100 for several years says both work well once the charge settings were found, though the Renogy BT app's history view is poor (August 2023).

YouTubeNot scored

The YouTube pool is blank: the one tester with measurements of Renogy's controllers, Footprint Hero, publishes a written review and is counted once, in the Google pool.

AmazonProduct-line7.0 out of 10

Renogy's Amazon US Rover listing (B01MSYGZGI) reads 4.4 from 3,826 ratings in a variation family that runs from the Rover 20A to the Rover 100A (October 2026).

User reviewsNot scored

The retailer pool is blank: Walmart's Rover Li 30/40 A family listing shows 52 written reviews, nearly all marked as reposted from renogy.com, leaving under ten native; Home Depot's RNG-CTRL-RVR40 listing shows 100 reviews, nearly all reposted from renogy.com, and Lowe's 88 show no source split.

Trustpilot

Trustpilot rates renogy.com 4.0 from 6,939 reviews on a claimed profile that Renogy pays Trustpilot to subscribe to.
The split is 59 percent five-star against 22 percent one-star.

Track record

The BBB rates Renogy A+ and has accredited it since January 2014, with 122 complaints filed in the last three years.
CPSC recall 16-725 (2016) replaced about 1,500 RNG-100DB bendable panels for fire risk, and NHTSA recall 24E-005 (2024) gave about 1,800 RV-maker battery packs a firmware fix.

Not countedExcluded

Not counted in any pool: renogy.com's own review widget, Renogy's YouTube channel, its r/RenogyCommunity subreddit and Facebook groups, or its Impact affiliate and Off-Grid Creator programs.

Summary

Brand-level

4.0 on Trustpilot, an A+ from the BBB, two recalls

Specs

CapacityNot applicable
AC OutputNot applicable
System Voltage12/24 V auto
Panel PowerNot applicable
Charge Current40-49 A
Safety ListingRecognized component only
Cell TypeNot applicable
Low-Temp ChargingNot applicable
Warranty3 Years
MonitoringBluetooth add-on
Weight4.4 lb

Show 5 moreShow fewer

At a glance

Sensor cable 9.8 ft
4 mounting brackets in box
9.38 x 6.78 x 3.05 in
Wakes 0 V lithium batteries

Company

Renogy is the brand of RNG International, Inc., of Ontario, California, which Dr. Yi Li founded in 2010.

Where it sells

It sells direct from renogy.com and its Amazon and eBay brand stores, and through Home Depot, Lowe's, Best Buy, Camping World and Walmart's marketplace.

Description

The Renogy Rover Li 40A (RNG-CTRL-RVR40) is a 12/24 V auto-detecting MPPT solar charge controller rated 40 A of charge current, with tracking efficiency up to 99 percent and peak conversion efficiency of 98 percent by Renogy. It accepts PV input from 15 to 100 V open-circuit and up to 520 W at 12 V or 1040 W at 24 V, draws under 100 mA at 12 V, and has an LCD, DC load terminals rated 20 A and an RS485 port for Renogy's BT-2 Bluetooth module or Renogy ONE Core. It charges sealed, gel, flooded, lithium and user-defined battery types and can recharge an over-discharged lithium battery. It is rated IP32 and -31 °F to 113 °F (-35 °C to 45 °C), takes up to 8 AWG wire, measures 9.38 x 6.78 x 3.05 in and weighs 4.4 lb by Renogy's product page. The box holds the controller, a remote temperature sensor on a 9.8 ft cable and four mounting brackets. Renogy lists it at $205.99 alone and also sells it with a BT-2 module and with a BT-2 and a Renogy ONE Core; on 2026-10-12 the cart applied discounts to $152.44, $161.70 and $222.04 for the three.