Victron Energy Power System Overview

DC Power System Components

Lithium Battery Bank

The system utilizes two Victron Energy BLUE POWER 12.8V-200Ah NG-LiFePO4 Lithium Batteries ?. These are connected to the Lynx Smart BMS.

Lynx Smart BMS NG

The Lynx Smart BMS (Battery Management System) manages the lithium batteries. It connects to the batteries, the Lynx Distributor, and the Cerbo GX via VE.Can for communication and control. It also has terminals for pre-alarm and ON/OFF signals.

DC Distribution

Central DC distribution is managed via Positive and Negative Busbars ?. These busbars receive power from the main battery bank (protected by Class-T 300A fuses) and distribute it to various system components including loads, the MPPT, Orion XS, SmartBatteryProtect, and the MultiPlus-II.

Starter Battery System

A 12V-125Ah Starter Battery ? is included to start the engine. It is charged by a Victron Energy Blue Smart Charger 12V-5A ⚡ and receives power from the vehicle's alternator (12V-150A) via its internal fuse. The starter motor is also connected to this system.

DC-DC Charging

The Victron Energy Orion XS 12/12-50A DC-DC battery charger ⚡ connects to the starter battery system and the main DC system, facilitating power transfer between them.

Load and Charge Protection

The Victron Energy Smart BatteryProtect 220 (SBP 220) ⚡ is used for load and charge disconnect, protecting the battery from over-discharge or over-current conditions. It connects to the DC busbar and loads.

AC Power System Components

AC Input Sources

The system can accept AC power from two sources:

• Shore Power Connection: A 50A Easy Lock connector ? for external AC power.
• Generator Power: A 4KW 120V/60Hz AC Generator ⚡.

MultiPlus-II Inverter/Charger

The core of the AC system is the Victron Energy MultiPlus-II 12/3000/120-50 2x120V ⚡. This unit functions as an inverter, battery charger, and provides power assist. It has an AC transfer switch with a 50A capacity. It draws power from the DC system to invert to AC or charges the batteries from the AC input. It connects to AC IN and provides split-phase AC outputs.

AC Output Distribution

The MultiPlus-II provides two AC output circuits (AC OUT-1 and AC OUT-2), supporting a split-phase 120/240V configuration. This allows for separate 120V L1, 120V L2, and 240V L1-L2 loads. The diagram distinguishes between 'Switched loads' and 'No Break loads'. It is critical to install an Earth leakage device with breaker or a combination MCB/RCD on the output for each 120V leg and 240V.

Note: Early production batches of the MultiPlus-II with serial numbers starting with HQ2107 had an AC Out-2 rated at 35A, while later batches (HQ2114 or higher) support 50A.

Solar Power System

Solar Charge Controller

A Victron Energy SmartSolar MPPT 100/50 charge controller ☀️ manages power from the Solar Array. It supports 12/24V systems, has a maximum PV input voltage of 100V, and a charge current of 50A. It connects to the PV input and the DC busbar.

Monitoring and Control

Cerbo GX

The Victron Energy Cerbo GX ⚙️ serves as the central monitoring and control hub for the system. It communicates with various components via VE.Can, VE.Bus, and VE.Direct, enabling features like DVCC (Distributed Voltage Charge Control) for managing charging devices.

GX Touch 50 Display

The GX Touch 50 is a touchscreen display ?️ that connects to the Cerbo GX, providing a user interface for monitoring system status and making adjustments.

Important Information and Safety

Safety Warnings

⚠️ 120 & 240 VOLT AC IS EXTREMELY HAZARDOUS !!! DO NOT TOUCH ANY LIVE WIRED PARTS OF THE INSTALLATION !!! WHEN IN DOUBT, ALWAYS CONSULT YOUR VICTRON DEALER !!!

KEEP POSITIVE BATTERY CABLES ALL AS SHORT AS POSSIBLE AND ALL AT THE SAME LENGTH ! KEEP NEGATIVE BATTERY CABLES ALL AS SHORT AS POSSIBLE AND ALL AT THE SAME LENGTH !

When operating in inverter mode, the Neutral output of an inverter/charger must be connected to ground to guarantee proper functioning of a GFCI or RCD device. In case of a split phase supply, the Neutral also must be grounded. The primary Case ground connection from an inverter charger must be connected to the Central Negative Busbar of the DC system. The size of this cable must be identical to the connected DC negative cable.

For charging, read the instructions. For indoor use only. Disconnect the supply before making or breaking connections to the battery. WARNING: Explosive gases, prevent flames and sparks, provide adequate ventilation during charging. Charge lead-acid or Li-Ion batteries only.

System Operation Notes

In systems with Victron Lithium NG Batteries, all charging devices and loads should be controlled by the BMS and Cerbo GX. This is achieved via the Cerbo GX's DVCC feature for the MultiPlus-II, solar charger, and Orion XS. DC loads are controlled via the SmartBatteryProtect 220.

The MultiPlus-II connects to the preferred input L1 and Neutral. Power to charge batteries is drawn from L1. When AC is unavailable, the MultiPlus switches to inverter mode, providing a 120V single-phase output. It connects both output lines L1 & L2 of output-1 together for 120VAC loads. 240VAC loads are only supplied when the MultiPlus is connected to a split-phase AC source at its input.

AC Out-2 is only available when power is present on AC IN and is disconnected during battery operation. It supports up to 50A (or 35A for early batches).

Recommended DC cable/fuse size for MultiPlus-II: For 0-5m cable length, use 4 x AWG 1/0; for 5-10m, use 4 x AWG 2/0. Fuse size should be 400A.

Recommended AC IN cable/breaker size for MultiPlus-II: AC IN must be protected by a circuit breaker rated at 50A max or less, adjusted based on the connected power source.