G5 Harmonic Assessment
ENA EREC G5/5 Harmonic Assessments for EV Charging Infrastructure and Power Electronic Installations
Threepwood Consulting provides ENA EREC G5/5 harmonic assessments to support new electrical connections and network compliance requirements across the United Kingdom.
Our team has extensive experience assessing electric vehicle charging installations, battery energy storage systems, renewable energy projects and other power electronic equipment requiring harmonic compliance studies.
We offer a fast and straightforward service, providing clear technical reports suitable for submission to Distribution Network Operators (DNOs) and Independent Distribution Network Operators (IDNOs).
Why Choose Threepwood?
- Experienced power systems engineers
- Assessments completed in accordance with ENA EREC G5/5
- Suitable for EV charging, battery storage and power electronic installations
- Clear technical reports for network approval
- Nationwide service
- Fast turnaround available
Assessment Options
Stages 1 A/B/C/D and 2 A/B Assessment
Suitable for smaller installations where a simplified assessment can be undertaken in accordance with ENA EREC G5/5.
The assessment typically includes:
- Review of equipment ratings and connection details
- Stage 1 screening calculations
- Assessment report
- Compliance conclusion and recommendations
This option is often suitable for smaller EV charging installations and other low-capacity power electronic connections.
Stage 2 C Assessment
Suitable for larger installations or projects that fail the initial assessment and require a detailed harmonic study.
The assessment typically includes:
- Detailed harmonic emission analysis
- Network fault level assessment
- Harmonic voltage calculations
- Compliance assessment against planning limits
- Comprehensive technical report
This option is typically required for larger or more complex installations where a detailed harmonic assessment is needed to demonstrate compliance.
Information Required
To complete an assessment, we typically require:
- Single line diagram
- Equipment manufacturer and model details
- Harmonic emission data (where available)
- Connection voltage
- DNO fault level information (if available)
- Project location