Redarc BCDC Alpha 50
#19 in 40 A and upFull review
For 4x4 and truck builds that need the toughest sealed charger with Bluetooth. Buyers on a budget get more amps per dollar elsewhere.
Amazon $735$735
2.2/5
For overlanders who want a tough, potted charger that can live in the engine bay and take solar too. Buyers mounting inside the cabin can get similar charging for much less.
- 40 ACharge current
- MPPTSolar input
- 2 yearsWarranty
Check price at Amazon$620
Price checked October 29, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Charges from the alternator and solar panels at the same time, using solar first
- Sealed, fan-free and rated for engine-bay heat up to 176 °F, so it can mount under the hood
- Runs from 12 V or 24 V vehicles and supports variable-voltage and idle-stop alternators
- Draws under 8 mA in standby, so it won’t flatten a parked vehicle’s battery
Cons
- Costs about three times as much as 40 A chargers from Renogy or Redodo
- Only four fixed charge profiles, no custom voltages
- No Bluetooth or app; status is shown on LEDs only
- Two-year warranty is short for the price
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its current. How we rank explains each one.
Specifications
| Model number | BCDC1240D |
|---|---|
| Charging | |
| Charge current | 40 A |
| Input battery | 12/24 V |
| Output battery | 12 V |
| LiFePO4 profile | Yes |
| Smart alternator support | Yes |
| Solar | |
| Solar input | MPPT |
| Max solar voltage | 32 V |
| Build | |
| Bluetooth | No |
| Weight | 2.2 lb |
| Warranty | 2 years |
| Released | 2024-09 |
Alternatives in this current
Redarc BCDC Classic 50
#20 in 40 A and upFull review
For a big lithium bank in a 4x4 or truck where the charger must sit in the engine bay. Expensive for what it does.
Amazon $690$690
Sterling Power BB1240 40A
#21 in 40 A and upFull review
For boats and vans where keeping the start battery charged matters as much as the house bank.
Amazon $381.65$381.65
Compare
Also compared with: BougeRV Sunflow 40A (charge controller), EPEVER Tracer 4210AN G3 (charge controller), Renogy Rover 40A (charge controller).
Compare the Redarc BCDC Classic 40 (BCDC1240D) with any other DC-DC charger →
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