






🔋 Power up smartly — never miss a charge, never lose a moment.
The Renogy 12V 40A DC to DC Battery Charger is an intelligent, compact converter designed for diverse battery types including Flooded, Gel, AGM, and Lithium. Ideal for RVs, trucks, motorhomes, commercial vehicles, boats, and yachts, it features advanced alternator detection, Bluetooth remote control with 365-day data logging, and comprehensive electronic protections to ensure safe, efficient charging on the go.







| ASIN | B0D94914J1 |
| Best Sellers Rank | 2,825 in Automotive ( See Top 100 in Automotive ) 40 in Car Battery Charging Units |
| Guaranteed software updates until | unknown |
| Item model number | RBC40D1U-UK |
| Manufacturer | Renogy |
| Product Dimensions | 24 x 15 x 6 cm; 1.75 kg |
P**F
Great for beginners
Easy to install. Works out of the box.
P**D
As described
As described
A**R
Battery to battery charger
Excellent item easy to set up and working very well
J**S
Worked briefly unfortunately.
Missed our return window unfortunately, buy with caution, unit worked for a few weeks and will now only output 12.08volts 🤷 sooooooo broken but it'll make a good door stop 😞
B**H
Understand IGN function
The item itself is great and it does what it is meant to do. Just be aware the new generation of these have dummy logic built in to the IGN wire functioning. The IGN wire can no longer be used as a on/off switch. The charger is always on when voltage above 13.2V and cuts out at 12.8V. With IGN activated, the charger is basically always on. Beware for custom builds, it will drain your lead if you dont seperate it physically.
M**H
Best value
Best value for money
A**T
Great piece of kit
Great piece of kit Easy to install Speedy delivery
S**N
Great bit of kit.
Arrived quickly and works great. Make sure to use mega or nano fuses as the resettable one I first tried led me to think the charger was faulty as it was only allowing 3.5amps through it. Bypassed the fuse and it was then working perfectly at outputting the full 60amps.
G**I
Renogy Bellissimo da vedere ma il mio non funzionava non caricava la batteria servizi . Ho fatto il reso
H**S
Het enige wat mij niet bevalt is het geluid van de ventilator. Ik ben gewoon best kritisch daarop hoor. Maar in mijn nieuwe camper heb ik heb ingebouwd in een kastje en hoor ik niets meer. 40 ampere is genoeg om de accu snel bij te laden
G**N
Kan inte vara mer än nöjd både med effekten och priset.
C**N
Très bon produit voir dans le temps
K**F
Po dwóch miesiącach użytkowania przestała działać... Serwis gwarancyjny jest nie wiadomo gdzie i nie wiadomo jak zgłosić produkt na gwarancje, ogólnie polecam się dobrze zastanowić.
Trustpilot
1 month ago
3 weeks ago