Victron Energy Quattro-II 48/5000 Specifications & Review
The Victron Quattro-II 48/5000 features two AC inputs — one for grid and one for generator — making it ideal for off-grid systems with generator backup. It automatically prioritizes solar, then grid, then generator power. The built-in transfer switch handles seamless switching between all power sources.
What Makes the Victron Energy Quattro-II 48/5000 Different
The Victron Energy Quattro-II 48/5000 Inverter/Charger is a 5.0 kW inverter/charger from Victron Energy, the Dutch company that has been the gold standard for off-grid power systems for over 50 years. The Quattro-II uniquely features two AC inputs — one for grid and one for generator — with automatic source prioritization, making it the definitive choice for off-grid systems with generator backup. Unlike typical solar inverters, Victron products have no built-in MPPT solar charge controller — they pair with separate Victron SmartSolar MPPT units for maximum design flexibility. The PowerAssist feature supplements shore or generator power with battery power during peak loads. Victron's open-source approach with VE.Bus communication and VRM monitoring platform has created the most customizable energy system ecosystem in the industry.
Key Specifications
| Brand | Victron Energy |
| Model | Victron Energy Quattro-II 48/5000 Inverter/Charger |
| Type | Hybrid |
| Max AC Power | 5000W |
| Max DC Power | 7000W |
| Peak Efficiency | 96% |
| CEC Efficiency | 94.5% |
| DC Voltage Range | 38-66V |
| Max Input Voltage | 66V DC |
| Max Input Current | 70A |
| Output Voltage | 120/240V |
| MPPT Trackers | 0 |
| Monitoring | Victron VRM Portal (WiFi/Ethernet via GX device) |
| Communication | VE.Bus |
| Dimensions | 470 x 350 x 280 mm |
| Weight | 35 kg |
| IP Rating | IP22 |
| Operating Temperature | -40C to +65C |
| Warranty | 5 years |
| Certifications | UL 1741, FCC Part 15, CSA C22.2 |
Pros & Cons
Pros
- ✓ Dual AC inputs for grid and generator — automatic source selection
- ✓ Seamless switching between solar, grid, and generator power
- ✓ 5kW continuous output suitable for most residential loads
- ✓ Can be paralleled or configured for three-phase operation
Cons
- ✗ No built-in MPPT solar charge controller
- ✗ IP22 rating requires protected indoor installation
- ✗ 5-year warranty is below industry average for residential inverters
Best For
Off-grid installations with generator backup that need automatic power source management
Is the Victron Energy Quattro-II 48/5000 Worth It?
The Victron Energy Quattro-II 48/5000 delivers 5.0 kW of AC output with a peak efficiency of 96% and a CEC weighted efficiency of 94.5%. This places it slightly below the average for hybrid inverters (approximately 97%). While not the highest-efficiency option in its class, the difference of a fraction of a percent typically amounts to only a small reduction in annual energy yield for most residential systems.
The Quattro-II 48/5000 includes a below-average 5-year warranty. The industry standard for hybrid inverters is 12 to 15 years, so you may want to factor in potential replacement costs or check whether an extended warranty option is available from Victron Energy or your installer.
As a hybrid inverter, the Quattro-II 48/5000 combines solar conversion with battery management in a single unit. This means you can add battery storage without needing a separate battery inverter, reducing equipment costs and simplifying your installation. The Quattro-II 48/5000 enables backup power during grid outages and can optimize self-consumption by storing excess solar energy for evening use or time-of-use rate arbitrage.
Overall, the Victron Energy Quattro-II 48/5000 can be a reasonable choice depending on your priorities and budget. Weigh its 96% efficiency and 5-year warranty against competing models to determine if it delivers the best value for your specific installation needs.
Real-World Performance
The Quattro-II 48/5000 achieves 94.5% CEC efficiency. While this is lower than dedicated solar string inverters, the MultiPlus/Quattro architecture is optimized for battery-based operation where the inverter runs continuously from battery power. The built-in transfer switch activates in under 20ms, and PowerAssist dynamically supplements grid or generator power with battery power during peak loads. The extreme -40C to +65C operating range makes Victron the go-to choice for harsh environments. The dual AC input with automatic source prioritization handles the grid/generator/solar trifecta seamlessly. The IP22 rating requires indoor or protected installation.
Who Should Buy the Victron Energy Quattro-II 48/5000?
System Design Tips
Size your DC array at 1.2-1.4x the 5.0 kW AC rating (6.0-7.0 kW DC) for optimal energy harvest. The 66V maximum DC input allows string lengths that should be calculated based on panel Voc and local temperature extremes. For battery pairing, check the manufacturer compatibility list for validated battery models. Mount the inverter in a well-ventilated location with adequate clearance for thermal management. The IP22 rating requires indoor installation only.
Price Estimate
The Victron Energy Quattro-II 48/5000 Inverter/Charger typically costs $1500-$3000 for the inverter unit, which includes battery management capability. A complete 5.0 kW solar-plus-storage residential system typically runs $14k-$23k installed before the 30% federal ITC. After ITC: approximately $10k-$16k.
How the Victron Energy Quattro-II 48/5000 Compares
| Model | AC Power | Efficiency | MPPT | Warranty |
|---|---|---|---|---|
| Victron Energy Quattro-II 48/5000 (this inverter) | 5.0 kW | 96% | 0 | 5 yrs |
| SMA Sunny Boy Smart Energy 5.0 | 5.0 kW | 97.5% | 2 | 10 yrs |
| Fronius Primo GEN24 5.0 Plus | 5.0 kW | 97.8% | 2 | 10 yrs |
| GoodWe GW5000-EH | 5.0 kW | 97.8% | 2 | 10 yrs |
Compare This Inverter
Installation & Compatibility
DC Input Specifications
- DC Voltage Range
- 38-66V
- Max Input Voltage
- 66V DC
- Max Input Current
- 70A
- MPPT Trackers
- 0
- Max DC Input
- 7.0 kW
With 0 MPPT tracker, panels can be configured in a single optimized string. Always verify string sizing with your installer for your specific panel model and location.
System Sizing & Environment
- Max AC Output
- 5.0 kW
- Max DC Input
- 7.0 kW
- Recommended Panels (350-400W)
- 13-20 panels
- Output Voltage
- 120/240V
- IP Rating
- IP22
- Operating Temperature
- -40C to +65C
- Dimensions
- 470 x 350 x 280 mm
- Weight
- 35 kg (77.2 lbs)
Monitoring & Communication
- - Monitoring: Victron VRM Portal (WiFi/Ethernet via GX device)
- - Communication: VE.Bus
- - Certifications: UL 1741, FCC Part 15, CSA C22.2
Frequently Asked Questions
What solar panels are compatible with the Victron Energy Quattro-II 48/5000 Inverter/Charger?
The Quattro-II 48/5000 works with solar panels configured within its 38-66V MPPT voltage range and 66V maximum input voltage. Most residential and commercial panels are compatible when properly strung. Always run a string sizing calculation accounting for your coldest expected temperature to ensure Voc stays below 66V.
What is the warranty on the Victron Energy Quattro-II 48/5000 Inverter/Charger?
Victron Energy provides a 5-year standard warranty on the Quattro-II 48/5000. Extended warranty options may be available through Victron Energy for additional cost.
Can the Victron Energy Quattro-II 48/5000 Inverter/Charger work with battery storage?
Yes, the Quattro-II 48/5000 includes integrated battery management. It works with 48V lithium and lead-acid battery banks. Victron SmartSolar MPPT charge controllers handle the solar input separately.
What type of inverter is the Victron Energy Quattro-II 48/5000?
The Victron Energy Quattro-II 48/5000 is a hybrid rated at 5.0 kW AC output. Hybrid inverters can work with both solar panels and battery storage, enabling backup power during outages.
What is the CEC efficiency of the Victron Energy Quattro-II 48/5000?
The CEC weighted efficiency is 94.5%, with a peak efficiency of 96%. CEC efficiency is a more realistic measure of real-world performance than peak efficiency, as it accounts for varying power levels throughout the day.
How long is the warranty on the Victron Energy Quattro-II 48/5000?
The Victron Energy Quattro-II 48/5000 comes with a 5-year manufacturer warranty. Extended warranty options may be available through your installer.
Is the Victron Energy Quattro-II 48/5000 compatible with battery storage?
Yes, the Victron Energy Quattro-II 48/5000 is a hybrid inverter with built-in battery management. It can connect directly to compatible battery systems, enabling solar self-consumption, time-of-use optimization, and backup power during grid outages without requiring a separate battery inverter.
How many panels can the Victron Energy Quattro-II 48/5000 support?
With a maximum DC input of 7.0 kW, the Victron Energy Quattro-II 48/5000 can support approximately 13 to 20 standard residential solar panels (350-400W each) across 0 MPPT tracker. Actual panel count depends on individual panel wattage, string sizing, and local electrical code requirements. Always consult your installer for precise string calculations.
Does the Victron Energy Quattro-II 48/5000 have rapid shutdown?
The Victron Energy Quattro-II 48/5000 supports rapid shutdown in compliance with NEC 2017/2020 requirements. As a hybrid inverter, rapid shutdown compliance may require additional module-level devices depending on your jurisdiction and system configuration. Check with your installer to confirm the specific rapid shutdown solution needed for your installation.
Is the Victron Energy Quattro-II 48/5000 suitable for my system size?
The Victron Energy Quattro-II 48/5000 is rated at 5.0 kW AC output, making it suitable for small to mid-size residential systems. The maximum DC input of 7.0 kW allows for typical DC/AC oversizing ratios of 1.1 to 1.3x, accommodating solar arrays of approximately 6.0 kW to 7.0 kW.
What monitoring options does the Victron Energy Quattro-II 48/5000 offer?
The Victron Energy Quattro-II 48/5000 includes Victron VRM Portal (WiFi/Ethernet via GX device) monitoring capabilities via VE.Bus communication. You can track system-level production, consumption patterns, and historical performance data. Most monitoring platforms offer web dashboards and mobile apps for real-time and historical data access. Check with Victron Energy for specific app availability and any subscription requirements for advanced features.
You Might Also Like
Victron Energy MultiPlus-II 48/5000 vs Victron Energy Quattro-II 48/5000
ComparisonVictron Energy Quattro-II 48/10000 vs Victron Energy Quattro-II 48/5000
GuideBest Solar Inverter with Battery Backup in 2026
BrandAll Victron Energy Solar Products
Helpful Guides
Last updated: February 2026