Schumacher SDC371 40A DC-DC
#18 in 40 A and upFull review
A very cheap way to try alternator charging on an older vehicle, if the third party listing holds up.
Amazon $59.95$59.95
2.7/5
For a big lithium bank in a 4x4 or truck where the charger must sit in the engine bay. Expensive for what it does.
- 50 ACharge current
- MPPTSolar input
- 2 yearsWarranty
Check price at Amazon$690
Price checked October 31, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Built to live in the engine bay, so it can sit close to the start battery
- Charges from a 12 V or 24 V vehicle
- Solar input with green power priority uses the sun first
- Five charge profiles including calcium for older start batteries
Cons
- Costs two to three times as much as a Renogy of the same current
- Only a 2 year warranty for the price
- No published efficiency or IP rating
- No Bluetooth
The Redarc BCDC Classic family
Every Redarc BCDC Classic model we rank, smallest first. Ratings compare each against its own current.
| Model | Charge current | Rating | Price |
|---|---|---|---|
| Redarc BCDC Classic 25 | 25 A | 2.7/5 | $477 |
| Redarc BCDC Classic 50 (this one) | 50 A | 2.7/5 | $690 |
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 | BCDC1250D |
|---|---|
| Charging | |
| Charge current | 50 A |
| Input battery | 12/24 V |
| Output battery | 12 V |
| Battery types | standard lead acid, calcium, gel, AGM, LiFePO4 |
| LiFePO4 profile | Yes |
| Smart alternator support | Yes |
| Solar | |
| Solar input | MPPT |
| Max solar voltage | 32 V |
| Build | |
| Bluetooth | No |
| Weight | 1.5 lb |
| Warranty | 2 years |
Alternatives in this current
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
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
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