PV System Voltage Stabilization for Polish Supermarket Chain

Project Profile: PV System Voltage Stabilization for Polish Supermarket Chain

Client: A leading supermarket chain in Poland
Challenge: Voltage Rise Leading to PV Curtailment and Revenue Loss

The Problem: Grid Instability Limiting Solar ROI

Following the successful installation of rooftop PV systems across multiple stores, the client faced a critical issue. During peak solar generation hours, especially in areas with weak grid infrastructure, the voltage at the point of connection would frequently exceed the EN 50160 standard limits.

This caused their PV inverters to automatically trip or derate, resulting in:

Significant lost solar generation during the most productive hours.

Reduced ROI on their PV investment.

Non-compliance with grid connection requirements for reactive power support.

Our Solution: Smart SVG with Integrated EMS Backend & User-Centric PV Mode

We provided and installed our compact, high-efficiency Static Var Generator (SVG) units, enhanced with Sanhe’s exclusive independent EMS backend platform. This system doesn’t just react—it proactively manages energy performance.

How It Works & Key Advantages:

Set-and-Forget Simplicity with PV Mode:
The customer simply selects the “PV Mode” in the intuitive interface. Once activated, the SVG automatically and intelligently manages grid voltage without the need for complex parameter setting. It seamlessly absorbs reactive power only when needed, ensuring effortless daily operation.

Unified Visibility and Control via Sanhe EMS Platform:
Our standalone EMS backend provides a centralized dashboard for real-time monitoring and control of all deployed SVG units across multiple supermarket sites. Users can:

Track voltage stability, reactive power output, and PV performance.

Receive automated alerts and diagnostics.

Adjust system settings remotely for optimal site-level performance.

Maximized Energy Yield:
By maintaining perfect grid voltage, our SVG prevents inverter shutdowns, ensuring up to 99% of potential solar energy is utilized.

Rapid ROI:
The investment in the SVG and EMS is typically recovered within 1–2 years through salvaged solar electricity and reduced operational oversight.

Full Compliance Made Easy:
The system automatically ensures adherence to Polish grid codes, with all compliance data logged and accessible in the EMS for audits or reporting.

Investment & Return: Smarter Control, Enhanced Profit

Investment: A one-time cost for the user-friendly SVG and Sanhe EMS platform—including hardware, installation, and lifetime access to the monitoring system.

Return:

Higher Solar ROI: Salvages 15–25% of previously lost generation.

Reduced Operational Overhead: Remote management cuts down site visits and manual checks.

Data-Driven Decision-Making: The EMS offers insights for future energy efficiency improvements.

Compliance Guaranteed: Automated reporting ensures ongoing adherence to grid standards.

Conclusion:

With Sanhe’s smart SVG and dedicated EMS platform, the supermarket chain has not only resolved its voltage issues but also entered a new phase of intelligent, user-friendly energy asset management. They now achieve maximum solar ROI with minimal effort, backed by a system that offers clarity, control, and confidence for the long term.