In libraryDCC50S 12V 50A DC-DC Charger with MPPT
The Renogy DCC50S charges a 12 V house battery with up to 50 A from two sources at once: the alternator, including Euro 6 smart alternators from 12 V, and solar panels through a built-in MPPT controller. Battery profiles cover AGM, gel, flooded and lithium. Self-consumption is 60 mA; the unit operates from -35 to 65 °C.
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Safety notes for this component
- Common negative ground: the DCC50S is not isolated, so starter and house battery negatives must be joined.
- Fuse the alternator input, the solar input and the battery output separately, each close to its source.
Wiring it in
Current, fuse and cable size for the DCC50S 12V 50A DC-DC Charger with MPPT at full rated power.
Supply → charger
DC input · 12 V| Cable run (one way) | Cable | Voltage drop |
|---|---|---|
| 1 m | 25 mm² · 4 AWG | 0.7 % |
| 2 m | 25 mm² · 4 AWG | 1.3 % |
| 3 m | 25 mm² · 4 AWG | 2 % |
| 5 m | 35 mm² · 2 AWG | 2.4 % |
Charger → battery
DC output · 12 V| Cable run (one way) | Cable | Voltage drop |
|---|---|---|
| 1 m | 25 mm² · 4 AWG | 0.6 % |
| 2 m | 25 mm² · 4 AWG | 1.2 % |
| 3 m | 25 mm² · 4 AWG | 1.8 % |
| 5 m | 25 mm² · 4 AWG | 3 % |
Current is the rated power divided by the nominal voltage, so a charger can come out a little above its label rating. Copper cable at 20 °C, positive and negative conductor, at most 3 % voltage drop. The cable is always rated for the fuse that protects it, and the fuse is sized at 125 % of the current. Input current assumes about 90 % conversion efficiency. If the manufacturer manual specifies a fuse or cable, follow the manual.
Technical data
Alternatives
All chargers →
- Power
- 520 W
- PV input
- up to 100 V
- Output
- 12 V DC
- Power
- 700 W
- Input
- 12 V DC
- Output
- 12 V DC
- Power
- 700 W
- Input
- 12 V DC
- Output
- 12 V DC
- Power
- 720 W
- PV input
- up to 145 V
- Output
- 12 V DC
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