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West Coast Medical Centre - Vredenburg

West Coast Medical Centre - Vredenburg

This large commercial project came to us through a referral from a trusted electrician, bringing us the opportunity to power the West Coast Medical Centre, a two-story facility designed to support a range of medical practitioners. This building, with 14 units for rent, accommodates diverse medical services including general practitioners, ambulance services, oncology care, and more. Collaborating closely with the builder, electrician, engineer, architect, and client, we developed a robust solution to meet the continuous power needs of a busy medical center.

To make the most of available resources, we installed 94x 540W panels across the roof, divided over three MPPTs. The setup includes two DC-coupled Victron MPPT RS units, dedicated to optimizing solar generation for battery storage, and a powerful 27kW Fronius AC-coupled grid-tie inverter, which efficiently directs PV power to cover building loads.

On the backup side, we designed the system with staged expansion in mind, allowing for up to three stages of upgrade, each capable of adding three Victron MultiPlus-II 10kVA inverters in a 3-phase configuration. Additionally, the design supports substantial future upgrades to battery backup capacity as the center’s energy needs evolve. Paired with two 20kWh Freedom Won lithium batteries, this setup ensures reliable, uninterrupted power across the medical center, enabling essential services to operate smoothly regardless of grid reliability.

To enhance functionality, we incorporated custom automation using Node-RED, allowing for intelligent controls and remote management. The system automatically manages fan operations based on temperature and provides the customer with remote access to control air conditioning and geysers outside of business hours. Additionally, excess power is fed back to the grid, letting the center benefit from unused energy. All of this is seamlessly managed through Victron’s world-class VRM app, offering real-time monitoring and control on the fly, ensuring an optimized and highly responsive energy system.

Components:

  • 3x Victron MultiPlus-II 48/10000/140-100 Inverter/Chargers in 3-phase;
  • 2x Victron SmartSolar MPPT RS 450/2000 Charge Controllers;
  • 1x Fronius Eco 27kWh;
  • over 50kWp of PV;
  • 2x FreedomWon 20/16 Lithium batteries
  • Victron CerboGX + Touch70;
  • Large Hager AC distribution board, capable of handling 2 more clusters of 30kW Inverter expansions;
  • Large 2000A DC busbar system;
  • RuviTAG Bluetooth sensor;
  • Shelly Relay switch to integrate to Node-RED via MQTT;

Notes:

  • ESS enabled with BatteryLife;
  • Node-RED enabled to turn AC and geysers on/off on time of day, grid availability and manual button, giving customer option to turn them on/off outside of regular business hours;
  • Bluetooth temp sensor to provide temp, humidity and pressure info to system, turning an extraction fan on/off should it be required;
Tagged as:
3-phase, ac-coupled-pv, battery-freedomwon-lithium, charge-controller, fronius, multiplus-ii-10kva, rs-mppt

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022 495 0016/17
info@baysolar.co.za

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Tel: 022 495 0016
Tel: 022 495 0017
Cel/WA: 072 437 7620
Email: info@baysolar.co.za
39 Main St, Langebaan

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