From the maker
What the catalog says
Manufacturer, model, ratings and which terminal does what come from the catalog. A newer revision, or the nameplate on the unit in your hand, can say something different — when it does, the nameplate wins.
Phoenix Smart IP43 12/50
Victron Phoenix IP43 50A
12 V / 50 A shore-power charger from the Smart IP43 range. Available in 230 V and universal 120–240 V (85–250 VAC) input versions; IP43-rated, so mount it in a dry indoor space. Ships as (1+1) — adding a 3 A starter-battery output — or as the three-output (3) version listed separately.
The reference run on this page is 3 m one way, sized against ABYC E-11. Your own run will differ, and the canvas sizes that one.
Wiring diagram
How the Phoenix 50A is wired.
The drawing shows where the feed, the return and the fuse land on this part. The starter uses the same reference circuit and sizing assumptions. Read the installation notes for manufacturer requirements before adapting the runs.
Build it out
Build the system it goes in.
Open the canvas with Phoenix Smart IP43 12/50 already placed, then add your batteries, charging, distribution and loads around it.
Every cable you draw there is sized against ABYC E-11, from the same tables as the reference on this page.
Technical reference
Specs, terminals and the parts around them.
The catalog facts for this part, which terminal takes what, and the hardware you'll want around it. Check the nameplate on your own unit before you order.
Catalog specification
- Rated output
- 50 A
- Planning charge current
- 47 A
3 m reference run
12 V system
- Wire
- 16 mm² · 6 AWG
- Fuse
- 70 A
- Design current
- 50 A
- Voltage drop
- 2.8%
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 length is one way; voltage drop includes an equal-length return. The shared starter uses 3.048 m (10 ft) runs unless a shorter run is stated. These are example assumptions for you to adapt to your own installation.
Supporting parts
- 6 m total of 16 mm² (6 AWG) marine cable
- Terminations for 16 mm² cable, matched to the equipment's screw terminals, leads or studs
- 70 A fuse and holder on the positive run
- Heat-shrink, strain relief and terminal boots sized to the cable
Check stud sizes, fuse type, run length and how warm the space gets against the gear you actually have before you order.
Terminal map
Catalog connection points, current direction and planning limits. Check the manufacturer's pinout and connector ratings before installation.
AC L
ac-l
neutral · input
AC N
ac-n
neutral · input
AC ⏚
ac-pe
ground · bidi
BATT +
batt-pos
positive · output
BATT −
batt-neg
negative · output
Method & provenance
What is known, assumed and computed.
The manufacturer publishes some of these numbers and Crimp works out the rest. It's worth knowing which is which.
ABYC E-11
What Crimp worked out
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 run length and the current above are what drive the result. Crimp doesn't know how warm your space gets; draw the cable inside an engine-bay zone on the canvas and it sizes for the heat.
Next step
Draw the Phoenix 50A into your own system.
It lands on the canvas already placed. Add what it connects to, and every run gets its wire and fuse as you draw.