WKS EVO Circle Pro 6.5 kVA 48V Mono Hybrid Inverter

WKS Evo Circle PRO 6.5 kVA 48V hybrid inverter

The most advanced hybrid solar inverter of its generation

The WKS Evo Circle PRO is a latest-generation hybrid inverter designed for off-grid and hybrid solar installations. It combines three essential functions in a single unit: pure sine wave inverter, MPPT solar charge controller and mains charger. This all-in-one design significantly simplifies the planning and management of a photovoltaic system whilst 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 combined power outputs of 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.

What this inverter actually does

The WKS EVO Circle PRO continuously manages the flow of energy between your solar panels, your battery, the grid or your generator, and your appliances:

• It converts solar energy into pure sine wave 230 V AC electricity, with a peak efficiency of 93%
• It stores surplus energy in your 48 V battery via its integrated 120 A MPPT controller
• It powers your appliances first from the panels, then from the battery, and finally from the grid or generator as a backup
• It protects your critical loads thanks to its dual independent AC outputs: essential appliances remain powered at all times, whilst secondary loads are shed if the battery is low

With 12 to 18 solar panels (5 to 9 kWp) and a 10 kWh battery bank, a house of 100 to 150 m² can achieve 80 to 100% self-sufficiency during sunny months, with an estimated reduction in electricity bills of between €1,000 and €1,800 per year depending on consumption patterns.

Use our simulator to get a personalised estimate.

An all-in-one inverter for your energy independence

Designed to meet the needs of residential, commercial or off-grid installations, the WKS Evo Circle PRO ensures a stable, clean and continuous power supply, even without a mains grid.
Thanks to its 120 A MPPT technology and wide photovoltaic input range (90 V – 450 V), it makes the most 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 appliances remain powered, whilst non-priority loads are activated only when solar production is sufficient.

Complete 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 colour LCD screen displays solar power, charge status, battery voltage and instant consumption in real time.

Thanks to its WiFi connectivity and the i.Solar mobile app, you can monitor your data wherever you are: daily production, historical data, system alerts, remote diagnostics, etc.
A BMS port is provided for direct communication with modern lithium batteries, ensuring perfect load balancing 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, offering a total power output of 39 kW.
This flexibility makes it ideal for high-consumption buildings: main 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.

Dual AC output: your safeguard against power cuts

This is one of the most important features of the WKS EVO Circle PRO and is often underused:

• Output 1 — Critical loads: always powered, even if the battery is low. Connect your fridge, freezer, lighting, internet router, security system and water pump here
• Output 2 — Secondary loads: powered only when solar production is sufficient or when the battery is fully charged. Connect your washing machine, dishwasher and non-essential appliances here

This smart management ensures that your essential appliances never switch off, even in the event of low production or a partially discharged battery.

Unfailing safety and reliability

The WKS Evo Circle PRO features a comprehensive set of electronic safeguards:

• Overload and overheating
• AC and PV overvoltage
• Short circuit
• Reverse polarity
• Automatic thermal management via variable ventilation

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

Battery compatibility: the widest on the market in its category

The WKS EVO Circle PRO is compatible with a very wide range of 48 V batteries:

LiFePO4 lithium batteries (recommended):

• Pylontech US3000C, US5000 — BMS communication via dedicated CAN/RS485 port
• DeLong Top Energy (BYD and CALB cells) — 5.12 kWh to 15 kWh per module
• Leapton EL-A05 — IP65, ideal for damp environments
• UZ Energy L051100-A1
• And many other 48 V brands compatible with BMS

Lead-acid batteries (AGM, Gel, lead-carbon):

• Compatible with all 48 V lead-acid batteries on the market
• Adjustable charging curves (absorption, float, equalisation)
• Cost-effective solution for off-grid sites or tight budgets

The integrated BMS port (CAN, RS485 or RS232) ensures direct communication with lithium batteries: the inverter automatically adjusts the charging parameters according to the battery’s actual condition, maximising its lifespan.

Who is this inverter for?

Off-grid homes
Sites without access to the mains grid or with an unstable grid: mountain chalets, homes in rural areas, off-grid islands. Full autonomy with a backup generator if required.

Second homes
Holiday homes used infrequently: the inverter automatically manages the battery and panels, even when you’re away. Remote monitoring via i.Solar.

Workshops and farm buildings
Power for machinery, pumps, lighting and ventilation systems without relying on the grid tariff. Significant reduction in business bills.

High-power and scalable projects
Need 10, 20 or 30 kW? Start with 2 or 3 units and add more as required, without having to overhaul the system.

Backup power supply (solar UPS)
Protect your sensitive equipment (servers, control systems, refrigeration) against grid outages thanks to dual output and automatic failover.

Why choose the WKS Evo Circle PRO on Wattuneed?

1. Best-selling product: chosen by thousands of installers and users across Europe.
2. Warranty and technical support provided by Wattuneed, a solar energy specialist since 2008.
3. Fully compatible with our range of panels, batteries and accessories.
4. Permanent stock and fast delivery across Europe.
5. Pre-sales support for sizing and configuring your system.

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

Installation: what you need to know

Installation must be carried out by a qualified electrician. Important points to check:

48 V batteries are mandatory — the inverter will not operate without a battery bank connected

Provide a DC protection box (fuses or circuit breakers) between the panels and the inverter

The battery cabling must be rated for 120 A — ensure cables of sufficient cross-section and suitable terminals are used

For a parallel installation, an inter-inverter communication cable is required (available separately)

Ensure the two AC output circuits are clearly separated at the distribution board to utilise the dual output

Good ventilation of the room is essential to ensure proper heat dissipation. It is recommended to use cables of suitable cross-section and protection devices (DC circuit breakers, fuses, surge arresters) appropriate to the system’s power rating.

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

1. Practical application – Example of a real-world installation

Example: Off-grid home with lithium batteries

A detached house of 120 m², equipped with:

• 12 x 450 W solar panels (5.4 kWp),
• 1 WKS Evo Circle PRO 6.5 kVA inverter,
• a battery bank comprising two Delong or Pylontech lithium batteries – 10 kWh.

The system works as follows:

• During the day, the WKS Evo Circle PRO directly converts solar power to supply the house and charges the battery via its 120 A MPPT controller.
• At night, it automatically switches to battery mode and continues to power essential equipment (lighting, fridge, freezer, telecommunications).
• If the battery is low or consumption is high, the built-in AC charger kicks in and recharges the batteries via the generator or the grid.

Result:

• 100% self-sufficiency for most of the year,
• an electricity bill reduction of over 80%,
• no power cuts, even in remote locations.

Wiring and connection

1. PV connectors
2. AC output connectors (load connection)
3. AC input connectors
4. Battery connectors
5. Current 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

Topic	Objective / Benefit
Technical tags	Decoding inverter data to make the right choice
Measuring DC voltage	Using a voltmeter to measure direct current
Protective enclosure	Securing the installation: RCD + earth
Connecting the Pylontech inverter and batteries	Optimising the installation and wiring
Surge protection box (polarity)	Prevent polarity reversal
Surge protection box (earth)	Understanding earthing
Connecting panels to the inverter	Maximising solar yield
AC IN/OUT connection	Correct electrical connection
AC wiring (neutral/phase)	Securing the AC installation
Pylontech battery → WKS Circle inverter	Ensure optimal performance
Communication cable	Reliable system connection
Inverter pre-startup	Pre-startup checks
Circuits powered by the inverter	Ensuring proper operation & safety
Standard hybrid inverter start-up	Understanding readings & voltage
Basic settings for inverter + lithium batteries	Optimising settings & performance