Renogy DCC50S 12V 50A DC-DC Charger with MPPT

Name: Renogy DCC50S 12V 50A DC-DC Charger with MPPT
Brand: Renogy
SKU: RBC50D1S

SVT Score, Top

6.2

Usability6.4/10Social6.0/10The SVT Score is placed on its category's range

Versus

6.4

SVT SCORESRead review

A 12 V, 50 A charger that feeds a house battery from the alternator or from up to 660 W and 50 V of solar through its own MPPT controller.

$308

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SKU: RBC50D1S Category: DC-DC Chargers Brand: Renogy

Usability

6.4 out of 10

Capacity8.0

Its 50 A output works out to 640 W at 12.8 V, on the 600 to 749 W rung, so it scores 8 on capacity.

Efficiency4.0

Renogy's product page prints 94 percent charging efficiency against the manual's 'up to 97 percent', and the lower figure scores, so it scores 4 on efficiency.

Operating Range8.0

It has a smart-alternator (Euro 6) mode that starts above 12.0 V and stops below 11.5 V, but those thresholds are fixed, so it scores 8 on operating range.

Features6.0

It takes up to 660 W of solar through MPPT and reaches Bluetooth only through the add-on BT-2 module, with no galvanic isolation, no published IP rating and no parallel mode, so it scores 6 on features.

Verification8.0

Intertek's directory lists the RBC50D1S to UL 1741 and CSA C22.2 No. 107.1, a US listing and a Canadian one held by model, so it scores 8 on verification.

Warranty & Support3.0

Renogy's product page gives 2 years while its warranty document lists the RBC50D1S-G7 at 3 years and the G6 at 2, and the shorter term scores, so it scores 3 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

$307.99 at renogy.com.

Summary

Fifty amps from road or roof

The RBC50D1S is Renogy's DCC50S, a 12 V charger that fills a van or RV house battery from the alternator or from solar panels through its built-in MPPT controller.

Verdict

It suits a buyer with a 12 V van or RV, a healthy alternator and up to 660 W of panels who wants one 50 A box for both sources, and who will not need a 24 V bank, built-in Bluetooth or a sealed enclosure.

Strengths

50 A from the alternator or up to 660 W of solar
Solar input up to 50 Vso two 12 V panels can run in series
Smart-alternatorEuro 6) mode from 12 V input
Charge current settable from 50 A down to 10 A
Under 30 mA idle draw

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Drawbacks

Product page warranty of 2 years against 3 years for the G7 in Renogy's warranty document
94 percent efficiency on the product pageagainst 'up to 97 percent' in the manual
Bluetooth only through the separately sold BT-2 module
Solar and alternator each capped at 25 A when both are charging
No published IP rating and no galvanic isolation

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Social score

6.0 out of 10

Reddit5.0 out of 10

Liked

Two years of alternator charging without a major issue
A 100 W panel worked as soon as it was plugged in
Renogy quickly replaced a unit that failed near the end of its warranty

Complaints

An early unit took only 25 V of solar though the downloaded manual said 50 V
The app would not run without phone location turned on
A commenter called the DC-DC and solar combo Renogy's most troublesome product

In r/vandwellers an owner of Renogy's 50A DC-DC MPPT charger reported two years of alternator charging without a major issue and a 100 W panel that worked as soon as it was plugged in, though the app would not run without phone location turned on (2025). In the same subreddit another owner fried a 50A unit after wiring two panels to about 44 V, finding his was an early unit limited to 25 V while the manual he downloaded said 50 V (August 2025); he later praised Renogy for quickly replacing a unit that failed near the end of its warranty. A commenter in that thread called the combined DC-DC and solar units the one Renogy product people seem to have problems with (2025).

Google6.0 out of 10

Liked

Kept working through limit tests and restarted itself after each cut-off
Kept a truck camper's lithium bank charged and isolated the truck's batteries
Bluetooth module shows starter, house, alternator and solar readings in the app

Complaints

Early units took only 25 V of solar, so 12 V panels needed parallel wiring
Each source is capped at half the rated current when both are connected
Commenters found Renogy support unhelpful on lithium float voltage

On DIY Solar Forum, Will Prowse, the forum's owner, whose reviews disclose free product, paid promotion and affiliate links, found the DCC50S worked 'extremely well' and 'fool proof' through his limit tests, his one complaint being its then 25 V solar input (November 2019). A Truck Camper Adventure reader who bought a DCC50S, in a review carrying Amazon affiliate links, said it 'has performed very well' keeping his lithium bank charged and isolating the truck's batteries (December 2020). 4WDing Australia, which bought its DCC50S and links Renogy through an affiliate program, was 'fairly happy' with it and singled out the Bluetooth module's app readings (January 2023); commenters there reported unhelpful answers from Renogy support on lithium float voltage.

YouTubeNot scored

The YouTube pool is blank: no tester video with a stated verdict on a Renogy DC-DC charger was found, and the one recent video, Cleversolarpower's (October 2026), is marked as paid promotion.

Amazon7.0 out of 10

Renogy's Amazon US listing for the Smart 50A DC-DC MPPT charger (B093BB5JKF), whose 50 V and 660 W solar input matches the current DCC50S, reads 4.2 from 345 ratings, split 71 percent five-star, 7 four-star, 8 three-star, 1 two-star and 13 one-star, and showed the item as currently unavailable (October 2026). Amazon Canada's copy of the listing reads 4.2 from 334.

User reviewsNot scored

The retailer pool is blank: Walmart's DCC50S listing shows 64 written reviews, nearly all reposted from renogy.com, and Home Depot's DCC50S listing carries the earlier code RBC50D1S-G1.

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 V
Panel PowerNot applicable
Charge Current50-59 A
Safety ListingCSA 107.1 listed, UL 1741 listed
Cell TypeNot applicable
Low-Temp ChargingNot applicable
Warranty2 Years
MonitoringBluetooth add-on
Weight4.1 lb

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At a glance

M8 x 1.25 terminal studs
244 x 146 x 96 mm case
Solar cut-off below 7 A
Sold with Renogy ONE Core

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 DCC50S (RBC50D1S) is a 12 V dual-input charger that charges a house battery at up to 50 A from a vehicle's starter battery and alternator, or from solar panels through a built-in MPPT controller. Renogy's manual rates solar input at up to 50 V and 660 W, alternator input at up to 660 W from 13.2 to 16 V for a traditional alternator and 12 to 16 V for a smart (Euro 6) alternator, and charging efficiency at up to 97 percent; the product page prints 94 percent. In smart-alternator mode, with the IGN signal wire fitted, it starts charging once the starter battery holds above 12.0 V for 15 seconds and stops below 11.5 V (13.2 V and 12.7 V for a traditional alternator). When solar and alternator both feed it, each supplies at most 25 A, and below 7 A of solar current a low-current cut-off hands charging to the alternator. Charge current can be set to 50, 40, 30, 20 or 10 A, and profiles cover AGM, gel, flooded, lithium and a user-defined setting. It measures 9.61 x 5.75 x 3.78 in (244 x 146 x 96 mm), weighs 4.10 lb, uses M8 x 1.25 terminal studs and a common negative, and draws under 30 mA idle. Phone monitoring needs Renogy's separately sold BT-2 Bluetooth module on its RS485 port. The product page gives a 2-year warranty; Renogy's warranty document lists the RBC50D1S-G7 at 3 years and the G6 at 2. Renogy sells it alone at $307.99, with the BT-2 module at $324.99 and with the BT-2 and a Renogy ONE Core at $354.99.