Renogy DCC30S 30A DC-DC MPPT
#2 in Up to 30 AFull review
For smaller vans and truck campers with a 100 Ah battery and a panel or two on the roof. Bigger banks or arrays need the 50 A DCC50S.
Amazon $186.99$186.99
The Renogy DCC30S 30A DC-DC MPPT is the better DC-DC charger overall, rated 4.0 to 2.9. The Renogy DCC30S 30A DC-DC MPPT leads on value, charge current and warranty. The Redarc BCDC Alpha 25 wins on features. The Renogy DCC30S 30A DC-DC MPPT costs $502.01 less ($186.99 vs $689).
Redarc BCDC Alpha 25
#7 in Up to 30 AFull review
For 4x4 and truck builds that need the toughest sealed charger with Bluetooth. Buyers on a budget get more amps per dollar elsewhere.
Redarc $689$689
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 Renogy DCC30S 30A DC-DC MPPT for value ($6.23 per amp ($186.99, 30 A) vs $27.56 per amp ($689, 25 A)), charge current (30 A vs 25 A) and warranty (3-year warranty vs 2-year warranty).
- Choose the Redarc BCDC Alpha 25 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 up to 30 A DC-DC charger; a clear win is highlighted. How we rank explains each one.
| Factor weight | Renogy DCC30S 30A DC-DC MPPT | Redarc BCDC Alpha 25 |
|---|---|---|
| Overall rating | 4.0/5 | 2.9/5 |
| Value 30% | 68 $6.23 per amp ($186.99, 30 A) | 0 $27.56 per amp ($689, 25 A) |
| Charge current 20% | 100 30 A | 75 25 A |
| Efficiency 10% | 100 97% peak efficiency | 50 efficiency not published (neutral score used) |
| Features 20% | 50 solar input, smart alternator support | 75 solar input, smart alternator support, Bluetooth |
| Warranty 20% | 50 3-year warranty | 25 2-year warranty |
Specifications
| Renogy DCC30S 30A DC-DC MPPT | Redarc BCDC Alpha 25 | |
|---|---|---|
| Charging | ||
| Charge current | 30 A | 25 A |
| Input battery | 12 V | 12/24 V |
| Output battery | 12 V | 12 V |
| Battery types | - | AGM, gel, calcium, standard lead acid, LiFePO4, heated LiFePO4 |
| LiFePO4 profile | Yes | Yes |
| Smart alternator support | Yes | Yes |
| Peak efficiency | 97% | - |
| Isolated | No | - |
| Solar | ||
| Solar input | MPPT, up to 400 W | MPPT, up to 500 W |
| Max solar voltage | 30 V | 48 V |
| Build | ||
| Bluetooth | No | Yes |
| Ingress rating | - | IP67/IP69K |
| Weight | 3.1 lb | 2 lb |
| Warranty | 3 years | 2 years |
| Released | 2025-07 | - |