CrimpATI 12V Water Heater 300W
12V resistive immersion element for boat/van water tanks. 300 W ≈ 25 A continuous while heating; thermostatically cycled, so daily energy depends on use (default 1.5 h/day equivalent for warm-water rinse).
Open in Crimp →How the ATI 300W is wired
The run drawn here is the 3 m reference run sized below. Sized against ABYC E-11. Boats built to UK or EU rules answer to ISO 13297 — check these figures against it before you build. Confirm your own run length, routing and terminations before ordering — open this part in the designer to size it against your actual system.
What size cable and fuse does the ATI 300W need?
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 part's continuous draw. 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.
ATI 12V Water Heater 300W specifications and terminal map
- Compatible systems
- 12 V
- Rated power
- 300 W
- Continuous draw
- 25 A
Terminal map
| Terminal | Polarity | Direction | Rating |
|---|---|---|---|
| + | positive | input | 35 A |
| − | negative | input | 35 A |
What else you need to wire the ATI 300W
- 6 m total of 10 mm² (8 AWG) marine cable
- Four 10 mm² cable lugs matched to the equipment studs
- 35 A fuse and holder on the positive run
- Heat-shrink, strain relief, and terminal boots sized to the cable
Start from this part
Open the canvas with the ATI 300W already placed, then wire the rest of the system around it. Nothing to install and no sign-up — the project is saved in this browser, and you can download the file whenever you want it.
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.
Read the complete methodology →