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 3.3. The Renogy DCC30S 30A DC-DC MPPT leads on warranty and charge current. The ATEM POWER 25A DC-DC MPPT Charger costs $37 less ($149.99 vs $186.99).
ATEM POWER 25A DC-DC MPPT Charger
#4 in Up to 30 AFull review
A low cost dual input charger for a single 100 Ah battery in a 4x4 or small camper.
Amazon $149.99$149.99
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 warranty (3-year warranty vs 1-year warranty) and charge current (30 A vs 25 A).
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 | ATEM POWER 25A DC-DC MPPT Charger |
|---|---|---|
| Overall rating | 4.0/5 | 3.3/5 |
| Value 30% | 68 $6.23 per amp ($186.99, 30 A) | 71 $6 per amp ($149.99, 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 | 50 solar input, smart alternator support |
| Warranty 20% | 50 3-year warranty | 0 1-year warranty |
Specifications
| Renogy DCC30S 30A DC-DC MPPT | ATEM POWER 25A DC-DC MPPT Charger | |
|---|---|---|
| Charging | ||
| Charge current | 30 A | 25 A |
| Input battery | 12 V | 12 V |
| Output battery | 12 V | 12 V |
| Battery types | - | AGM, gel, calcium, lead acid, LiFePO4 |
| LiFePO4 profile | Yes | Yes |
| Smart alternator support | Yes | Yes |
| Peak efficiency | 97% | - |
| Isolated | No | - |
| Solar | ||
| Solar input | MPPT, up to 400 W | MPPT |
| Max solar voltage | 30 V | - |
| Build | ||
| Bluetooth | No | No |
| Weight | 3.1 lb | 3.2 lb |
| Warranty | 3 years | 1 year |
| Released | 2025-07 | - |