Renogy DCC30S 30A DC-DC MPPT
#2 in DC-DCFull 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 $186.97$186.97
The Renogy DCC30S 30A DC-DC MPPT is the better charge controller overall, rated 4.0 to 3.8. The Renogy DCC30S 30A DC-DC MPPT leads on efficiency and warranty. The Renogy 12V 40A DC-DC Charger wins on value. The Renogy 12V 40A DC-DC Charger costs $9.33 less ($177.64 vs $186.97).
Renogy 12V 40A DC-DC Charger
#4 in DC-DCFull review
A cheap, quiet way to add alternator charging to a van or camper with a lithium house battery. Pay more for Victron if you want built-in Bluetooth.
Amazon $177.64$177.64
Prices were last checked October 22, 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 efficiency (97% peak efficiency (maker rating) vs 94% peak efficiency (maker rating)) and warranty (3-year warranty vs 2-year warranty).
- Choose the Renogy 12V 40A DC-DC Charger for value ($4.44 per amp of charge current vs $6.23 per amp of charge current).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every DC-DC charge controller; a clear win is highlighted. How we rank explains each one.
| Factor weight | Renogy DCC30S 30A DC-DC MPPT | Renogy 12V 40A DC-DC Charger |
|---|---|---|
| Overall rating | 4.0/5 | 3.8/5 |
| Value 35% | 71 $6.23 per amp of charge current | 87 $4.44 per amp of charge current |
| Features 25% | 82 Bluetooth add-on, lithium profile, temperature sensor, smart-alternator support | 82 Bluetooth add-on, lithium profile, temperature sensor, smart-alternator support |
| Efficiency 20% | 88 97% peak efficiency (maker rating) | 50 94% peak efficiency (maker rating) |
| Warranty 20% | 50 3-year warranty | 25 2-year warranty |
Specifications
| Renogy DCC30S 30A DC-DC MPPT | Renogy 12V 40A DC-DC Charger | |
|---|---|---|
| Charging | ||
| Type | DC-DC charger with MPPT solar input | DC-DC charger |
| Charge current | 30 A | 40 A |
| Battery voltage | 12 V | 12 V |
| Lithium profile | Yes | Yes |
| Custom profile | Yes | Yes |
| Temperature sensor | Included | Included |
| Peak efficiency | 97% | 94% |
| Standby draw | 30 mA | 15 mA |
| Inputs | ||
| Max PV voltage (Voc) | 30 V | - |
| Max PV power (12 V) | 400 W | - |
| DC input range | 12 to 16 V | 12 to 16 V |
| Isolated | No | No |
| Smart alternator | Yes | Yes |
| Ignition sensing | Yes | Yes |
| Monitoring and build | ||
| Bluetooth | Optional add-on | Optional add-on |
| Display | No | No |
| Load output | No | No |
| Cooling | passive (heat sink, no fan) | passive (fan-free) |
| Dimensions | 9.61 x 5.75 x 3.03 in | 9.31 x 6.00 x 2.30 in |
| Weight | 3.1 lb | 4.1 lb |
| Warranty | 3 years | 2 years |