WKS Evo Circle PRO 6.5 kVA 48V Hybrid Inverter | Innovation and Performance

WKS Evo Circle PRO Hybrid Inverter 6.5 kVA 48V

The most advanced hybrid solar inverter of its generation

The WKS Evo Circle PRO is a next-generation hybrid inverter designed for stand-alone and hybrid solar installations. It combines three essential functions in a single device: a pure sine wave inverter , an MPPT solar charge controller , and a mains charger . This all-in-one architecture significantly simplifies the design and management of a photovoltaic system while ensuring high energy efficiency and exceptional reliability.

The WKS Evo Circle PRO stands out for its versatility , advanced connectivity and ability to operate in parallel for cumulative power up to 39 kW.

This model is ideal for off-grid homes , hybrid systems with batteries , or industrial and commercial installations requiring a reliable and continuous power supply .

An all-in-one inverter for your energy independence

Designed to meet the needs of residential, professional or isolated installations, the WKS Evo Circle PRO ensures a stable, clean and continuous power supply , even without an electrical grid.
Thanks to its MPPT 120 A technology and its wide photovoltaic input range (90 V – 450 V) , it makes maximum use of available solar energy, guaranteeing an efficiency of over 93%.

Its dual output system allows critical and secondary loads to be managed separately: your essential devices remain powered, while non-priority loads only activate when solar production is sufficient.

Total control over your production and consumption

The WKS Evo Circle PRO is designed for precise and intelligent control of your solar installation.
Its 4.3-inch color LCD screen displays real-time solar power, charge status, battery voltage and instantaneous consumption.

Thanks to its WiFi connectivity and Watchpower mobile app , you can track your data wherever you are: daily production, history, system alerts, remote diagnostics, etc.
A BMS port is provided for direct communication with modern lithium batteries, ensuring perfect charge balance and enhanced safety.

Parallel operation: scalable power up to 39 kW

The WKS Evo Circle PRO inverter can be installed in parallel with up to six identical units , providing a total power of 39 kW .
This flexibility makes it ideal for high-energy-consumption buildings: primary residences, businesses, workshops, agricultural buildings, tourist establishments or public institutions.

Each unit communicates via an intelligent parallel bus to balance the load and ensure maximum redundancy.

Unwavering safety and reliability

The WKS Evo Circle PRO incorporates a complete set of electronic protections :

• Overload and overheating
• AC and PV surge
• Short circuit
• Polarity reversal
• Automatic thermal management via variable ventilation

These safety features, combined with a robust ventilated steel design, ensure durable, quiet and reliable operation, even in demanding environments.

Battery compatibility

The WKS Evo Circle PRO works with the majority of batteries on the market:

• Lead-acid, AGM, and Gel batteries
• Lithium (LiFePO₄) batteries with integrated BMS communication
• Heavy-duty lead-carbon or hybrid batteries

It automatically adjusts its charging parameters according to the technology used, maximizing battery life.

Areas of application

• Residential off-grid systems
• Hybrid systems (solar + grid + batteries)
• Isolated sites : chalets, shelters, agricultural facilities
• Commercial buildings : offices, workshops, shops
• Backup power supply (UPS) for sensitive equipment

Why choose the WKS Evo Circle PRO on Wattuneed?

1. Bestselling product : adopted by thousands of installers and users in Europe.
2. Warranty and technical assistance provided by Wattuneed, solar energy specialist since 2008.
3. Full compatibility with our range of panels, batteries and accessories.
4. Permanent stock and fast delivery in Europe.
5. Pre-sales support for sizing and configuring your installation.

Wattuneed supports you at every stage of your project, from design to commissioning.

Installation tips

Proper ventilation of the room is essential to ensure adequate heat dissipation. It is recommended to use cables of appropriate cross-section and protective devices (DC circuit breakers, fuses, surge protectors) suitable for the installation's power rating.

Our technical teams can assist you with the initial setup and commissioning.

1. Practical application – Example of a real installation

Example: Self-sufficient house with lithium batteries

A detached house of 120 m², equipped with:

• 12 solar panels of 450 W each (i.e., 5.4 kWp),
• 1 WKS Evo Circle PRO 6.5 kVa inverter,
• a battery bank of two Delong or Pylontech Lithium batteries – 10 kWh .

The system works as follows:

• During the day, the WKS Evo Circle PRO directly converts solar production to power the house and recharges the battery via its 120A MPPT regulator.
• At night, it automatically switches to battery mode and continues to power essential equipment (lighting, refrigerator, freezer, telecommunications).
• In case of low battery or high consumption, the integrated AC charger activates and recharges the batteries via the generator or the mains.

Result :

• 100% autonomy for most of the year,
• reduction in electricity bills of more than 80%,
• no power outages, even in isolated locations.

Cabling and connection

1. PV Connectors
2. AC output connectors (load connection)
3. AC Input Connectors
4. Battery connectors
5. Power sharing port
6. Parallel communication port
7. Circuit breaker
8. On/Off Switch
9. External CT port
10. Internal WiFi
11. RS-232 communication port
12. BMS communication port: CAN, RS-485 or RS-232

A collection of videos to help you understand everything

Theme	Objective / Benefit
Technical labels	Decoding inverter information to make the right choice
DC voltage measurement	Use a voltmeter to measure direct current
Protective case	Securing the installation: differential + earth
Pylontech inverter & battery connection	Optimize installation and wiring
Surge protector box (polarity)	Avoid polarity reversal
Surge protector box (grounding)	Understanding grounding
Connecting panels to the inverter	Maximize solar yield
AC IN/OUT connection	Correct electrical connection
AC wiring (neutral/phase)	Securing AC power installations
Pylontech battery → WKS Circle inverter	Ensuring optimal performance
Communication cable	Reliable system connection
Inverter pre-start	Pre-launch checks
Inverter-powered circuits	Ensuring proper functioning & safety
Standard start hybrid inverter	Understanding indications & tension
Basic parameters of inverter + lithium batteries	Optimize settings & performance

Software

WatchPower 1.17SP1

• WatchPower MAC AMD
• WatchPower MAC ARM
• (32-bit) Linux
• (64-bit) Linux
• Windows

WatchPower 1.17SP3

• (32-bit) Linux
• (64-bit) Linux
• Windows

FAQ – WKS Evo Circle PRO

1. What is a hybrid solar inverter and what is the WKS Evo Circle PRO used for?

A hybrid solar inverter combines three functions:

• the conversion of direct current (DC) from solar panels into alternating current (AC) usable by your devices
• battery charging management via an MPPT regulator,
• and the possibility of recharging these batteries via the grid or a generator.
  The WKS Evo Circle PRO integrates these three functions into a single compact unit, making your solar system simpler, more efficient and scalable.

2. What is the maximum power of the WKS Evo Circle PRO?

The inverter provides a rated power of 6,500 VA / 6,500 W , sufficient to power an entire house or a small workshop.
It can be installed in parallel up to 6 units , thus offering a maximum cumulative power of 39 kW .

3. Can the WKS Evo Circle PRO operate without a battery?

Yes, it can operate in hybrid mode without a battery .
In this case, it prioritizes the use of solar energy produced during the day and automatically switches to the electrical grid when production is insufficient.

4. What is the maximum photovoltaic power it can handle?

The WKS Evo Circle PRO's integrated 120A MPPT regulator accepts up to 9,000W of solar power .
The input voltage of the panels can vary between 90V and 450V DC , making it compatible with the majority of photovoltaic configurations.

5. Is the WKS Evo Circle PRO compatible with lithium batteries?

Yes. It has a BMS communication port allowing direct communication with lithium (LiFePO₄) batteries.
This ensures a balanced, safe and optimized charge , extending the battery bank's lifespan.

6. What other battery technologies are compatible?

The inverter is compatible with open lead-acid, AGM, Gel, lead-carbon and lithium (LiFePO₄) batteries.
The battery type setting can be easily done from the LCD screen or via the mobile application.

7. How to track production and consumption in real time?

The WKS Evo Circle PRO integrates a WiFi module allowing connection to a dedicated mobile application (Android and iOS).
This interface displays solar production, consumption, battery status and historical data of your system in real time.

8. What protections are integrated into the WKS Evo Circle PRO?

The inverter has a full range of electronic protections: overload, overheating, AC and PV overvoltage, short circuit, reverse polarity and automatic thermal management by variable speed fans.
These devices ensure safe and durable operation, even under intensive use.

9. What is the standby power consumption and the efficiency of the inverter?

The overall efficiency of the WKS Evo Circle PRO reaches 93% .
Its standby power consumption is very low, thus optimizing battery life and the overall energy performance of the system.

10. Can multiple WKS Evo Circle PRO units be installed in parallel?

Yes, up to six units can be installed in parallel using a parallel communication kit .
This configuration allows the load to be distributed and the available power to be increased, up to a total of 39,000 W.

11. In which types of installations is this model best suited?

The WKS Evo Circle PRO is ideal for off-grid homes , hybrid systems combining grid, solar and batteries, isolated sites (chalets, shelters, cottages, farms), professional workshops and small businesses , as well as backup installations (solar UPS) for sensitive equipment.

12. What is the warranty for the WKS Evo Circle PRO?

The product is guaranteed for 2 years by Wattuneed , with the possibility of extension depending on the options available.
Technical support, after-sales service and configuration assistance are provided by our teams in Belgium.

13. Does the WKS Evo Circle PRO require professional installation?

Yes, it is strongly recommended that the installation be carried out by a qualified electrician or an approved photovoltaic installer .
This ensures electrical compliance, operational safety and the validity of the manufacturer's warranty.

14. How to buy the WKS Evo Circle PRO on Wattuneed.com?

You can order it on its own or in a complete solar kit including panels, batteries, wiring and accessories.
Our technical advisors can help you size your installation and choose compatible components.