Redodo 12/24V 40A MPPT Solar Charge Controller with Built-In Bluetooth
SVT Score, Mid
Redodo’s 40 A MPPT controller for 12 V and 24 V banks, with built-in Bluetooth, a 20 A load output, a battery temperature sensor and a 100 V solar input limit.
$145
We may earn a commission if you buy through this link. It never affects our scores. How this works
Usability
4.9 out of 10At 40 A it sits one rung above the typical charge controller, so it scores 6 on capacity.
Redodo's product page gives up to 98 percent peak conversion efficiency but its manual gives 97 percent; tracking is not conversion and the lower of Redodo's two conversion figures is scored, the 6 rung, so it scores 6 on efficiency.
Its spec table gives a 100 V maximum solar input voltage, the 5 rung, so it scores 5 on operating range.
Better on operating rangeLiTime 100A MPPT Controller150 V maximum PV input is the 7 rung. $282.99Scores 7.0It has built-in Bluetooth, a 20 A load output, a user-definable battery profile and a remote battery temperature sensor in the box, but no way to link or network controllers, so it scores 7 on features.
Redodo publishes no UL 458, UL 1741 or CSA listing for the 40A MPPT controller, and no record turned up under its model or maker in the Intertek, UL, LabTest, TÜV SÜD, TÜV Rheinland or SGS directories in October 2026, so it scores 2 on verification.
Better on verificationRenogy Rover Li 40A Controller$205.99Scores 4.0Redodo's warranty policy gives controllers 3 years, with no proration stated, so it scores 4 on warranty and support.
$144.99 at redodopower.com.
Bluetooth, sensor and load output
The Redodo 12V/24V 40A MPPT (R24V40A-MPPT-BT-E1) is Redodo's 40 A MPPT solar charge controller with built-in Bluetooth for 12 V and 24 V battery banks in RVs, vans, sheds and small cabins.
It suits a buyer with up to 600 W of panels on a 12 V bank or 1,200 W on a 24 V bank who wants phone monitoring and low-temperature charge protection, and who will not need panel strings above 100 V or a 48 V bank.
Strengths
- Built-in Bluetooth with the Redodo app
- Remote battery temperature sensor in the box
- 20 A DC load output with timer and dusk modes
- User-definable charging profile
- No-load loss of 12 mA at 12 V
Drawbacks
- Conversion efficiency 98 percent on the page97 percent in the manual
- 100 V solar input limit keeps strings short
- IP32 onlyfor dry indoor mounting
- LiFePO4 profile needs the system voltage set by hand
- No parallel or networked operation
Specs
- CapacityNot applicable
- AC OutputNot applicable
- System Voltage12/24 V auto
- Panel PowerNot applicable
- Charge Current40-49 A
- Safety ListingNone verifiable
- Cell TypeNot applicable
- Low-Temp ChargingNot applicable
- Warranty3 Years
- MonitoringBluetooth built in
- Weight4.4 lb
At a glance
- RS485 port (RJ12)
- 9.65 x 7.07 x 3.25 in
- Six copper wire connectors
- LCD with four buttons
Redodo is the brand of Shenzhen Maicheng Technology Innovation Co., Ltd. of Shenzhen, China, which holds its US trademarks and FCC grants, and its press releases give 2020 as its founding year.
It sells direct from redodopower.com, which ships US orders from US warehouses, and through its own Amazon and Walmart seller accounts, with separate stores for Canada, Germany, France, Spain and Japan.
The Redodo 12V/24V 40A MPPT (store SKU R24V40A-MPPT-BT-E1) is a 40 A MPPT solar charge controller for 12 V and 24 V battery banks. Its spec table gives a 100 V maximum solar input voltage, up to 600 W of panels at 12 V and 1,200 W at 24 V, a 9 to 32 V battery range and a 20 A rated load output; its manual adds a maximum power point range from battery voltage plus 3 V to 76 V, no-load loss of 12 mA at 12 V and 10 mA at 24 V, an IP32 protection degree and an operating range of -31°F to 113°F. Redodo's product page gives up to 99 percent tracking efficiency and up to 98 percent peak conversion efficiency; the manual's specification table gives 97 percent conversion efficiency and 99.9 percent tracking efficiency. It ships set for a 12 V LiFePO4 battery, offers FLD, SEL, GEL and a user-definable profile, and per the manual the LiFePO4 setting needs the system voltage set by hand rather than on auto. Built in are Bluetooth for the Redodo app, an RS485 port (RJ12), an LCD with four buttons and four LED indicators, and a remote temperature sensor port; the sensor drives low-temperature charge protection for lithium batteries (stops below 32°F, resumes above 41°F, off by default) and temperature compensation for lead acid. Protections cover reverse connection, over-power, over-voltage, short circuit and over-temperature. The manual gives 9.65 x 7.07 x 3.25 in (245 x 180 x 82.5 mm) and 4.41 lb. In the box, per the manual: the controller, a remote temperature sensor with an adhesive pad, six copper wire connectors and six heat-shrink tubes. Redodo also sells it in its 2.1kWh Off-Grid Solar Kit with the 12V 165Ah battery and the 2000W inverter ($728.42), its 4.2kWh Off-Grid Solar Kit with two 165Ah batteries and the 3000W inverter charger ($1,394.81), and its Lead-to-Lithium Upgrade Kit with the 12V 320Ah Mini ($1,258.10 with the 2000W inverter, a 40A charger and the 40A DC-DC; $1,366.41 with the 3000W inverter charger and the 40A DC-DC).
Questions answered from our data
Is Redodo good?We list 13 Redodo products and score 13 of them. Their overall scores run from 4.9 to 6.3, with a median of 5.7, against a median of 5.5 for all 127 products we score.
How much does an MPPT charge controller cost?The 14 MPPT charge controllers we list run from $90 to $702, with a median of $198.
Are MPPT charge controllers UL listed?Two of the 14 MPPT charge controllers we list carry a UL 1741-type listing we could look up by model.
Which MPPT charge controllers have Bluetooth?13 of the 14 MPPT charge controllers we list offer Bluetooth monitoring, built in or as the maker's add-on.
