CrimpRedarc BCDC1240D
Dual-input 40A DC-DC charger with MPPT solar input. Vehicle input accepts 9–32V so it runs under 12V or 24V alternators; Redarc specifies a 60A input fuse.
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A sizing result with its assumptions attached.
Sized against ABYC E-11. Boats built to UK or EU rules answer to ISO 13297 — check these figures against it before you build. The design current is the unit's rated output. 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.
The part the engine actually sees.
- Rated output
- 40 A
- Typical charge current
- 38 A
- PV open-circuit limit
- 32 V
Terminal map
| Terminal | Polarity | Direction | Rating |
|---|---|---|---|
| ALT + | positive | input | 60 A |
| PV + | positive | input | 25 A |
| PV − | negative | input | 25 A |
| BATT + | positive | output | 40 A |
| BATT − | negative | output | 40 A |
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.
What is known, assumed, and computed.
Catalog profile
The manufacturer, model, ratings and terminal map are maintained as planning data in Crimp's component catalog. Confirm the current manufacturer manual, exact revision and installed nameplate before ordering or wiring.
Engine reference
Sized against ABYC E-11. Boats built to UK or EU rules answer to ISO 13297 — check these figures against it before you build. The published conductor, fuse and voltage-drop result uses the visible reference length and current basis; it is not a universal installation prescription.
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