Similar to the MultiPlus-II, the Quattro-II is also a combined inverter and charger. Additionally, it can accept two AC inputs and automatically connect to the active source. Its many features include a true sine-wave inverter, adaptive charging, hybrid PowerAssist® technology plus multiple system-integration features such as three- or split- phase operation and parallel operation.
Two AC Inputs & Two AC Outputs
The Quattro-II can be connected to two independent AC sources—shore-side power and a generator, or two generators. It will automatically switch to whichever source is active. The main output has no-break functionality: if the grid or generator power fails, the Quattro-II takes over supply to the loads in under 20 ms, so computers and sensitive electronics continue running seamlessly. The secondary output is live only when AC is present on one of the inputs, ideal for loads (e.g. water heaters or air-conditioning) that shouldn’t discharge the battery.
Unique PowerAssist® Feature
To prevent overload of a limited AC source (generator or shore power), the Quattro-II will first reduce battery charging, then, if needed, draw extra power from the battery to boost the AC supply—covering short-term peaks without interruption.
Parallel & Three-Phase Operation
Up to six Quattro-II units can run in parallel for virtually unlimited power output. Three-phase or split-phase configurations are also supported—perfect for large off-grid installations, marine vessels or mobile applications requiring scalable, robust power.
Solar & Hybrid Energy Integration
Compatible with solar charge controllers and grid-tie inverters, the Quattro-II delivers AC power even during grid outages. It seamlessly integrates into both off-grid and grid-connected PV systems, ensuring uninterrupted power supply.
On-Site & Remote Monitoring
Local setup: Configure in minutes with VEConfigure software (MK3-USB interface). Monitoring options: Cerbo GX, Color Control GX, Venus GX, Octo GX, CANvu GX, Bluetooth (with VE.Bus Smart dongle), Battery Monitor, Digital Multi Control Panel. Remote access: Connect a Cerbo GX or other GX product to the internet for free VRM monitoring, data logging and remote configuration via Victron Remote Management.
| Specification | 48/5000/70-50 |
|---|---|
| PowerControl & PowerAssist | Yes |
| Transfer switch | 50 A |
| Maximum AC input current | 50 A |
| DC input voltage range | 38–66 V |
| Output voltage | 230 VAC ± 2 % |
| Frequency | 50 Hz ± 0,1 % |
| Continuous output power at 25 °C (VA) | 5000 VA |
| Continuous output power at 25 °C (W) | 4000 W |
| Continuous output power at 40 °C | 3700 W |
| Continuous output power at 65 °C | 3000 W |
| Maximum apparent feed-in power | 5000 VA |
| Peak power | 9000 W |
| Maximum efficiency | 96 % |
| Zero load power | 18 W |
| Zero load power in AES mode | 12 W |
| Zero load power in Search mode | 2 W |
| Charger input voltage range | 187–265 VAC |
| Charger input frequency | 45–65 Hz (pf 1) |
| Charge voltage “absorption” | 57,6 V |
| Charge voltage “float” | 55,2 V |
| Storage mode voltage | 52,8 V |
| Max. battery charge current | 70 A |
| Battery temperature sensor | Yes |
| Auxiliary output | Default: switches off when in inverter mode |
| Programmable relay | Yes |
| Protection | a – g |
| VE.Bus communication port | For parallel & three-phase operation, remote monitoring & system integration |
| General purpose com. port | Yes, 2× |
| Remote on-off | Yes |
| Operating temperature range | -40 to +65 °C (fan-assisted cooling) |
| Humidity (non-condensing) | max 95 % |
| Material & Colour | Steel, blue RAL 5012 |
| Protection category | IP21 |
| Battery-connection | M8 bolts |
| 230 VAC-connection | Screw terminals 13 mm² (6 AWG) |
| Weight | 29 kg |
| Dimensions (hxwxd) | 565 × 320 × 148 mm |
| Safety | EN-IEC 60335-1, EN-IEC 60335-2-29, EN-IEC 62109-1, EN-IEC 62109-2 |
| Emission & Immunity | EN 55014-1, EN 55014-2, EN-IEC 61000-3-2, EN-IEC 61000-3-3, IEC 61000-6-1, IEC 61000-6-2, IEC 61000-6-3 |
| Uninterruptible power supply | Please consult the certificates on our website |
| Anti-islanding | Please consult the certificates on our website |
Important:
All solar products, power systems, water heating and gas products and their components must be installed by appropriately qualified personnel. All installations must adhere to local wiring regulations and standards. Sustainable Online will not be held liable for any product malfunctions as a result of incorrectly installed systems.
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