PICO-ONE (PICO + SC303)
Simarine PICO One Set wiring diagram
PICO display with SC303 300A shunt, two voltage inputs and two resistance inputs for tanks or temperatures. The symbol represents the negative-side shunt and sensing leads; the separate fused 6–35V SiCOM splitter supply and sensor wiring must also be installed. The set is a monitor, not a BMS.
- Compatible systems
- 12 V / 24 V
Wiring diagram
How the PICO + SC303 is wired.
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Cable sizing for this example
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Installation notes
Before you install.
Open a question for model-specific guidance and sources.
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 →
What is included in PICO One?
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.
Where are the power and sense connections?
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.
What must be configured?
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.
What limits and checks matter?
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.
Technical reference
Specifications and terminal map.
Check the model, ratings and connection points against your own unit before choosing installation hardware.
Catalog specification
PICO display with SC303 300A shunt, two voltage inputs and two resistance inputs for tanks or temperatures. The symbol represents the negative-side shunt and sensing leads; the separate fused 6–35V SiCOM splitter supply and sensor wiring must also be installed. The set is a monitor, not a BMS.
- Compatible systems
- 12 V / 24 V
Terminal map
Catalog connection points, current direction and planning limits. Check the manufacturer's pinout and connector ratings before installation.
SHUNT IN −
negative · input
SHUNT OUT −
negative · output
V1 B+ SENSE
signal · input
V2 AUX SENSE
signal · input
A dash means a current rating is not specified here.
Sources and sizing method
Equipment specifications. Model details, ratings and terminal roles come from the catalog. Check your unit’s label and current manufacturer documentation for its exact revision.
Example sizing. Cable labels apply to the connected example, not a fixed cable size for this component. Set your actual equipment, current, lengths and installation conditions in Crimp before choosing hardware.
Read how the sizing worksNext step
Plan your installation with PICO + SC303.
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