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
The Redarc BCDC Alpha 50 is the better DC-DC charger overall, rated 2.8 to 2.7. The Redarc BCDC Alpha 50 leads on features. The Redarc BCDC Classic 50 costs $45 less ($690 vs $735).
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
Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Redarc BCDC Alpha 50 for features (solar input, smart alternator support, Bluetooth vs solar input, smart alternator support).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 40 A and up DC-DC charger; a clear win is highlighted. How we rank explains each one.
| Factor weight | Redarc BCDC Alpha 50 | Redarc BCDC Classic 50 |
|---|---|---|
| Overall rating | 2.8/5 | 2.7/5 |
| Value 30% | 6 $14.70 per amp ($735, 50 A) | 11 $13.80 per amp ($690, 50 A) |
| Charge current 20% | 50 50 A | 50 50 A |
| Efficiency 10% | 50 efficiency not published (neutral score used) | 50 efficiency not published (neutral score used) |
| Features 20% | 75 solar input, smart alternator support, Bluetooth | 50 solar input, smart alternator support |
| Warranty 20% | 25 2-year warranty | 25 2-year warranty |
Specifications
| Redarc BCDC Alpha 50 | Redarc BCDC Classic 50 | |
|---|---|---|
| Charging | ||
| Charge current | 50 A | 50 A |
| Input battery | 12/24 V | 12/24 V |
| Output battery | 12 V | 12 V |
| Battery types | AGM, gel, calcium, standard lead acid, LiFePO4, heated LiFePO4 | standard lead acid, calcium, gel, AGM, LiFePO4 |
| LiFePO4 profile | Yes | Yes |
| Smart alternator support | Yes | Yes |
| Solar | ||
| Solar input | MPPT, up to 1,000 W | MPPT |
| Max solar voltage | 48 V | 32 V |
| Build | ||
| Bluetooth | Yes | No |
| Ingress rating | IP67/IP69K | - |
| Weight | 2.1 lb | 1.5 lb |
| Warranty | 2 years | 2 years |