CrimpComponent folio · Charger · Renogy
DCC1240
40A non-isolated DC-DC charger from start to house battery. No solar input.
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Renogy DCC1240 · 4 terminals
01 — Reference run
A sizing result with its assumptions attached.
Conductor16 mm²6 AWG
Fuse50 Apositive run
Voltage drop2.2%3 m one way
Design current40 A12 V system
The Crimp engine applies its ordinary continuous-load headroom, voltage-drop budget, terminal clamp, and standard fuse ladder. The 3 m one-way run is a stated reference, not a universal installation prescription.
02 — Catalog specification
The part the engine actually sees.
- Rated output
- 40 A
- Typical charge current
- 38 A
- Canvas footprint
- 220 × 120 px
Terminal map
| Terminal | Polarity | Direction | Rating |
|---|---|---|---|
| START + | positive | input | 60 A |
| START − | negative | input | 60 A |
| BATT + | positive | output | 40 A |
| BATT − | negative | output | 40 A |
03 — Supporting parts
What belongs around it.
- 6 m total of 16 mm² (6 AWG) marine cable
- Four 16 mm² cable lugs matched to the equipment studs
- 50 A fuse and holder on the positive run
- Heat-shrink, strain relief, and terminal boots sized to the cable
See what it changes in your system
With JavaScript enabled, describe your existing boat, van, or off-grid system here. The model supplies topology; Crimp's engine computes the attachment, resized runs, checks, and supporting basket.