Inverters
Inverters
BrandVictron Energy
Victron Quattro-II
£ 1,415.48GBP · price may vary
BrandVictron Energy- Model
- VQ-II-24/5000/70-50
- Specifications
- 15
- Power Rating4000W
- System Battery Voltage24V
- PhasesSingle phase
- ConnectivityVE.Bus
- ConnectionM8 (battery), Screw terminals (AC)
- View all 15 specifications ↓
Overview
The MultiPlus-II is a multifunctional inverter/charger and is ideally suited for professional marine, yachting, vehicle and land based off-grid applications. It also has built in anti-islanding functionality, and an increasingly long list of country approvals for ESS applications, including G98 & G99 for the United Kingdom (48/3000 > 48/10000 models only).
Specifications
| Power Rating | 4000W |
|---|---|
| System Battery Voltage | 24V |
| Phases | Single phase |
| Connectivity | VE.Bus |
| Connection | M8 (battery), Screw terminals (AC) |
| Height | 607 |
| Width | 329 |
| Depth | 149 |
| Weight (kg) | 34 |
| Warranty | 5 |
| Certification | - |
| IP Rating | IP22 |
| On Grid / Off Grid | Off Grid |
| Backup Compatibility | Yes* |
| Lithium Compatibility | Yes* |
Reading the specifications
Victron Quattro-II is listed with 15 published specifications from Victron Energy, including power rating of 4000W, system battery voltage of 24V, phases of Single phase and connectivity of VE.Bus. Those figures are what decide whether this unit fits your system, so read them against the equipment it will connect to before comparing price.
For an inverter, the figures that matter most are continuous AC output in kW, which caps the load you can run at once, surge or peak rating, which covers the brief inrush of motors and compressors, maximum PV input and the number of MPPT trackers, which set how many panel strings you can connect and the MPPT voltage window, which decides how many panels go in a string. It is the component that decides what a solar system can do: how much power you can draw at once, whether you can export to the grid, whether the system keeps running in a blackout, and how well the panels and battery are managed day to day.
What to check before ordering
The checks below apply to any inverter. Run them against the specification table above — most disappointing solar purchases are compatible-on-paper units that fail one of these in practice.
- Confirm the inverter is approved by your local utility or distribution network before you buy if you intend to export power — grid connection depends on certified anti-islanding and local grid-code compliance, not on the inverter's specifications alone.
- Match the battery communication protocol (CAN bus or RS485) between inverter and battery. Compatible voltages are not enough; without a supported protocol the battery management system and inverter cannot agree on charge limits.
- Look at the warranty term and what it covers. Five years is the common baseline, ten is offered by stronger brands, and extensions are often cheaper bought with the unit than later.
- Size the inverter against the loads you need to run simultaneously, not against the total wattage of every appliance in the building — a 5 kW inverter comfortably runs a fridge, fans, lights and a couple of ACs, but not all of them plus a water pump starting at the same time.
Common mistakes
- Buying on peak-watt price alone. A cheap inverter with a narrow MPPT window forces awkward string layouts and can strand a portion of the array.
- Ignoring the ambient temperature rating. Inverters derate in heat, so a unit rated 5 kW at 25 °C may deliver noticeably less on a hot roof-adjacent wall at 45 °C.
- Assuming any grid-tie inverter keeps the lights on during an outage. Standard on-grid units shut down for safety unless they have a dedicated backup or islanding output.
Price and availability in United Kingdom
Victron Quattro-II is listed at £ 1,415 (GBP) for United Kingdom. Solar pricing moves with supply, import duties and exchange rates, and distributors set their own margins, so treat this as a comparison reference and confirm the current figure before you order.
SolarBazaar compares equipment rather than selling it. Shortlist here on specification and price, then buy from an authorised distributor or installer in United Kingdom: warranty cover on solar hardware is normally honoured through the channel you bought from, so confirm who supports Victron Energy locally before ordering.
Victron Quattro-II — frequently asked questions
How much does Victron Quattro-II cost?
Victron Quattro-II is listed at £ 1,415 (GBP) for United Kingdom. The figure is indicative — solar prices move with supply, duties and exchange rates, and each distributor sets its own margin — so confirm the current price with a supplier before ordering.
What are the specifications of Victron Quattro-II?
We hold 15 published specifications for this inverter, including power rating 4000W, system battery voltage 24V, phases Single phase, connectivity VE.Bus and connection M8 (battery), Screw terminals (AC). The full table is on this page, listed under model VQ-II-24/5000/70-50.
Who makes Victron Quattro-II?
Victron Quattro-II is a Victron Energy product, listed under inverters with model reference VQ-II-24/5000/70-50. The Victron Energy brand page lists the rest of its range so you can compare across the catalogue.
Is Victron Quattro-II right for my system?
That depends on what it has to connect to. For an inverter, check continuous AC output in kW, which caps the load you can run at once, surge or peak rating, which covers the brief inrush of motors and compressors and maximum PV input and the number of MPPT trackers, which set how many panel strings you can connect against the rest of your equipment before price enters the decision. Keep the panel array between roughly 1.0 and 1.3 times the inverter's rating. Slight oversizing (a higher DC-to-AC ratio) captures more energy on cloudy mornings and winter days; going far beyond it wastes generation through clipping.
Where can I buy Victron Quattro-II in United Kingdom?
SolarBazaar lists and compares equipment rather than selling it. Use the specifications and price here to shortlist, then buy through an authorised distributor or installer in United Kingdom — buying in-channel is what keeps the manufacturer's warranty valid.
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