5kW Variable-Pitch Wind Turbine Grid-Connected Project Case

2026-04-30

5kW Variable-Pitch Wind Turbine Grid-Connected Project Case

Full Grid Feed-in at Camping Julianadorp, Netherlands

Project Address: Julianadorp, Netherlands

Customer: Camping

Project Summary

At Camping Julianadorp in the province of North Holland, located near the North Sea coastline with an annual average wind speed of 6.5 m/s, Greef Energy deployed a purely grid-connected system consisting of the AH-5KW horizontal-axis variable-pitch Wind Turbine + GREEF grid-connected controller + 5kW grid-tied inverter. During the first 8 months of operation, the system generated an average of approximately 32 kWh per day, with all electricity fed into the grid for sale. The projected annual revenue is approximately €3,733, and the static payback period is about 2.6 years. The variable-pitch design has ensured continuous, stable operation and zero system failures despite strong North Sea gusts.

1. Project Background and Opportunity

Project Information	Details
Installation Location	Julianadorp, Netherlands
Owner	Camping
Wind Resource	Annual average wind speed 6.5 m/s; autumn/winter gusts can reach 30 m/s
Core Pain Points	Annual electricity consumption at the site is approximately 38,000 kWh, with high peak-season electricity prices; wind resources in the expansive, open area have remained idle year-round
Policy Incentive	Under the Dutch SDE++ renewable energy subsidy scheme, the feed-in tariff for small Wind Power is approximately €0.12/kWh
Customer Request	Utilize the open area of the campsite to install a small Wind Turbine and sell all generated electricity for long-term revenue

2. System Configuration

Core Equipment	Specifications / Model	Key Advantages
Wind Turbine	AH-5KW Horizontal-Axis Variable-Pitch	Rated power 5kW, 3 blades, rotor diameter 5.6m, cut-in wind speed 2.5 m/s
Tower	12m Freestanding Conical Tower	Hot-dip galvanized for corrosion protection, wind resistance class 12
Controller	GREEF Intelligent Grid-Connected Controller	Variable-pitch servo control, MPPT tracking, automatic synchronization, anti-islanding protection
Inverter	5kW Single-Phase Grid-Tied Inverter	Compliant with IEC 62116, THDi < 3%

System Structure Diagram:

3. Technical Highlight: Variable Pitch Tackling Strong North Sea Winds

Condition	Fixed-Pitch Wind Turbine	AH-5KW Variable-Pitch Wind Turbine
Strong Gusts (>25 m/s)	Must brake and shut down	Increases pitch angle to spill wind, maintains full-power operation
Low Wind Speed (2.5–4 m/s)	Low efficiency, hard to start	Small pitch angle, low-wind capture efficiency boosted by 35%
Extreme Storm (>35 m/s)	Severe mechanical brake wear	Feathering protection + electromagnetic braking, zero mechanical wear

Julianadorp experiences strong North Sea winds during autumn and winter. The annual equivalent full-load hours of the variable-pitch turbine are approximately 600 hours higher than those of a fixed-pitch turbine.

4. Key Operational Data (First 8 Months of Operation)

Key Indicator	Actual Data
Cumulative Electricity Generated	7,780 kWh
Average Daily Generation	~32 kWh
Average Monthly Revenue from Sales	~€313
Projected Annual Revenue from Sales	~€3,733
Total System Investment	€10,000 (Turbine + tower + grid connection + foundation)
Static Payback Period	~2.6 years
Annual Equivalent Full-Load Hours	~2,300 hours

5. On-Site Photographs

6. Customer Testimonial

"Our campsite is close to the sea, and the wind hardly ever stops. The turbine Greef installed last autumn has been running quietly and generating electricity even during storms. We can see the daily generation and revenue on our phones anytime – it feels like a fixed deposit that gets credited punctually every month."

— Camping Owner

7. Related Recommendations

🔗 20kW Grid-Connected Hydropower Case in Uzbekistan (Full grid sale from irrigation canal) 🔗 30kW On/Off-Grid Hybrid Hydropower Case in Panama (Self-consumption with surplus to grid)

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