The Multi RS Solar is a combined inverter/charger and MPPT solar charger.

It is designed to operate with a 48V battery bank and produces a pure AC sine wave at 230V.

Two AC outputs

Besides the usual uninterruptible output (AC-out-1), an auxiliary output (AC-out-2) is available that disconnects its load in the event of battery-only operation. Example: an electric boiler that is allowed to operate only if the AC input is available. There are several applications for AC-out-2.

PowerControl - maximum use of limited AC power

The product can supply a huge charging current. This implies heavy loading of the AC input. Therefore a maximum current can be set. The product then takes other power users into account, and only uses 'surplus' current for charging purposes.

PowerAssist - extended use of AC input current

This feature takes the principle of PowerControl to a further dimension allowing the product to supplement the capacity of the alternative source. Where peak power is often required only for a limited period, the product will make sure that insufficient AC input power is immediately compensated for by power from the battery. When the load reduces, the spare power is used to recharge the battery.

The Multi RS can provide throughput of up to 50 A to the loads. The AC input relays are limited to 50 A (Multi RS - 2 tracker), and the inverter can contribute up to 25 A continuous at best conditions (when it gets hotter this figure will be reduced).

This power comes from either the battery and/or the DC PV (the DC PV power also has to go through the inverter before it reaches the AC loads).

Programmable

All programmable settings and grid-interactive setpoints for this product can be changed with either a mobile phone or computer (Windows requires VE.Direct to USB dongle), using the free VictronConnect software available on the App Store of your device, or www.victronenergy.com.

Programmable relay

The product is equipped with a programmable relay. The relay can be programmed for different applications, for example as a starter relay.

Programmable analog/digital input/output ports

The product is equipped with 2 analog/digital input/output ports.

These ports can be used for several purposes. One application is communication with the allow-to-charge and allow-to-discharge BMS controls of a lithium-ion battery.

See appendix.

Built-in Battery Monitor

The ideal solution when the product is part of a hybrid system (AC input, inverter/chargers, storage battery, and alternative energy). The built-in battery monitor can be set to open and close the relay:

• start at a preset % discharge level
• start (with a preset delay) at a preset battery voltage
• start (with a preset delay) at a preset load level
• stop at a preset battery voltage
• stop (with a preset delay) after the bulk charge phase has been completed
• stop (with a preset delay) at a preset load level

High efficiency

Outstanding inverter/charger efficiency - Maximum efficiency of 96%. The inverter is short circuit proof and protected against overheating, whether due to overload or high ambient temperature.

Ultra-fast Maximum Power Point Tracking (MPPT) - Especially in case of a clouded sky, when light intensity is changing continuously, a fast MPPT algorithm will improve energy harvest by up to 30% compared to PWM charge controllers and by up to 10% compared to slower MPPT controllers.

Advanced Maximum Power Point Detection in case of partial shading conditions - If partial shading occurs, two or more maximum power points may be present on the power-voltage curve. Conventional MPPTs tend to lock to a local MPP, which may not be the optimum MPP. The innovative SmartSolar algorithm will always maximize energy harvest by locking to the optimum MPP.

Frequency shift function

When external PV inverters are connected to the output of the inverter, excess solar energy is used to recharge the batteries. Once the battery absorption voltage is reached, charge current will reduce by shifting the output frequency higher. This frequency shift is automatic and does not require configuration on the Multi RS Solar, though the AC PV inverter may require additional configuration.

This feature is used for battery over charge protection and solar assist.

The Multi RS Solar does not allow complete charging of the battery from an AC PV inverter to fully 100% State of Charge.

That is a safety precaution to prevent overcharging of the battery when the AC PV output cannot be adjusted quickly enough to prevent a system shutdown, so when charging from AC PV, there is some capacity left in the battery remaining to absorb this surplus.

To complete a full charge from solar, connect PV to the internal MPPT solar charger, or another DC MPPT.

High power inverter

High peak power - The inverter is able to supply a maximum AC output power to a peak 9000W or 50A AC, for 3 seconds. This supports smooth operation for motor start up and other demanding surge loads.

Continuous power output, with solar boost - Continuous output power at 25C t ambient, at 52VDC, is 5300W. When combined with solar power from the built-in MPPT this increases approximately 10% to 5800W.

Isolated PV connections for additional safety - Full galvanic isolation between PV and battery connections provide additional overall system safety.

Temperature Protected - Over-temperature protection and power derating when temperature is high.

Interfacing and Communications

VE.Direct port and two VE.Can ports

The Multi RS Solar only supports a data connection to a GX device (i.e Cerbo GX) via the VE.Can port, and not the VE.Direct port. The VE.Direct port can be used to connect a GlobalLink 520 for remote data monitoring, or USB to VE.Direct dongle for VictronConnect access on a Windows computer.

Device Display

A 4 line LCD back-lit display shows operational information including battery levels, solar yield, and system icons.

User I/O connector:                                                                          

·        Aux 1, 2 input

·        Programmable relay

·        Battery voltage sense (Vsense)

·        Battery temperature sense (Tsense)

·        Remote H & Remote L - Configurable

Bluetooth Smart built-in

The wireless solution to set-up, monitor and update the controller using Apple and Android smartphones, tablets or other compatible devices.

Configuring and monitoring with VictronConnect

Configure with the VictronConnect app. Available for iOS, Android devices, as well as macOS and Windows computers. A VE.Direct to USB accessory is required for Windows systems; enter VictronConnect in the search box on our website and see the VictronConnect download page for details.