PICO-ONE (PICO + SC303)
See the Simarine PICO One Set connection points and wiring example. Open the diagram in Crimp to add your equipment and plan the cables between them.
Open this example as a new project. Use your own parts and cable lengths to make the plan yours.
Use the diagram as a starting point for your installation. Replace the example equipment and cable lengths with your own, and check the connections against your exact model's instructions.
Cable sizes depend on the connected equipment, current and cable lengths. Add those details in Crimp to size each run.
Wiring diagram
Open this example in Crimp to use your own parts and cable lengths. Review the assumptions and installation notes as you adapt the circuit.
Installation notes
Guidance for this model, with sources linked beside the relevant advice.
Verified against the manufacturer's documentation (rev. PICO user manual V8.0; SC303/SC503 manual V1.4; current PICO-ONE set), checked 2026-10-01. Manufacturer documentation →
The current PICO One set contains a PICO display and SC303 300 A shunt. It can monitor one bank’s current, two voltages, and two resistance inputs for tanks or temperatures. It is not the legacy restricted PICOone display, nor a BMS that disconnects the battery.
The SC303 instructions recommend negative-side installation: bank negative to IN, every load and charger return to OUT. Install the fused voltage-sense connections, optional temperature probe and SiCOM data cable. The catalog’s V1/V2 pins are measurement leads, not power distribution outputs.
PICO also needs its 6–35 V supply through the splitter, as described in the display manual. The splitter and modules need a dry location even though the display is water resistant. Do not feed a 48 V bank directly to that supply just because voltage sensing reaches 75 V.
Assign the shunt and voltage channel to the battery, enter chemistry and actual bank capacity, then check current direction with a known load. Add tank senders by assigning their physical resistance channels and calibrating against real fill points. The manufacturer support notes say to leave unavailable C10/C5 battery characteristics unset rather than guess them.
The SC303 carries 300 A continuous; its larger brief peak ratings do not justify continuous inverter or thruster loading above that. Use the shunt manual’s cable requirements as well as the circuit’s ampacity/drop calculation. If the shunt disappears from menus, inspect SiCOM connections and supply/sense polarity. If current has the wrong sign, check IN/OUT orientation or the configured reversal before recalibrating capacity.
Build it out
Add PICO-ONE (PICO + SC303) to your diagram, then connect your batteries, chargers and loads. Crimp calculates cable sizes and checks the connections as you draw.
Every cable you draw there is sized against ABYC E-11, from the same tables as the reference on this page.
Technical reference
Check the model, ratings and connection points against your own unit before choosing installation hardware.
Check stud sizes, fuse type, run length and how warm the space gets against the gear you actually have before you order.
Catalog connection points, current direction and planning limits. Check the manufacturer's pinout and connector ratings before installation.
SHUNT IN −
batt-neg
negative · input
SHUNT OUT −
load-neg
negative · output
V1 B+ SENSE
vbat
signal · input
V2 AUX SENSE
vaux
signal · input
A dash means a current rating is not specified here.
Method & provenance
Manufacturer specifications describe the equipment. Crimp calculates cable results from the circuit and assumptions you enter.
From the maker
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.
ABYC E-11
Sized against ABYC E-11 — the US reference, and what Transport Canada accepts as an alternative to TP 1332 for pleasure craft under 24 m. 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
Open this example as a new project. Add your equipment and cable lengths, then review the sizing and checks for your setup.