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Project Highlight
Off-Grid Solar System for Domestic Use at Euthini, Mzimba
Overview
This project highlight examines a solar energy system installed in a newly built house located in a remote area in the northwest of Mzimba district. With the Escom grid years away from reaching this location, the solar energy system provides a complete solution for powering the household. The system includes an 8kW Sunsynk Hybrid Inverter, three 5kWh lithium batteries, and nine 450W solar panels.
System Components
Inverter:
- Model: 8kW Sunsynk Hybrid Inverter
- Function: Manages the conversion of solar energy (DC) to usable household power (AC) and coordinates the use of battery storage and solar panels.
Batteries:
- Type: Lithium-ion
- Capacity: 3 x 5kWh (Total 15kWh)
- Function: Stores excess solar energy to ensure a continuous power supply during non-sunny periods or nighttime.
Solar Panels:
- Type: 450W panels
- Quantity: 9
- Total Capacity: 4050W (4.05kW)
- Function: Captures solar energy and converts it into electricity.
System Functionality
Normal Operation
During daylight hours, the solar panels capture sunlight and convert it into electrical energy. The 8kW Sunsynk Hybrid Inverter manages this energy, prioritizing the immediate power needs of the household. Excess energy generated during peak sunlight hours is stored in the three 5kWh lithium batteries.
Backup Operation
When sunlight is insufficient (e.g., during nighttime or cloudy days), the system seamlessly switches to battery power. The stored energy in the lithium-ion batteries ensures that the household continues to receive power without interruption.
Hybrid Functionality
The Sunsynk Hybrid Inverter is designed to maximize the efficiency of solar energy utilization and battery storage. It intelligently balances the energy supply between the solar panels and batteries, ensuring optimal performance and energy availability.
Technical Specs
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Implementation
A suburban home equipped with this system experienced a series of power outages due to severe weather conditions. The 10kW inverter efficiently managed the home’s energy needs during sunny periods, while the 17.4kWh battery capacity provided ample backup during the outages. When the inverter encountered a technical issue, the ATS swiftly transferred the load to the Escom grid, ensuring that the household remained powered without any interruption.
The homeowners reported significant savings on their electricity bills and praised the system’s reliability and efficiency. This case exemplifies how modern energy storage and management systems can enhance energy security and sustainability for residential applications.
Conclusion
This particular case highlights the effectiveness of integrating a 10kW inverter, 17.4kWh lithium-ion battery storage, and an automatic transfer switch to create a robust home power backup system. By leveraging solar energy and ensuring seamless power transmission, the system provides a reliable, efficient, and eco-friendly solution to modern energy needs.
System Benefits
- Independence from Grid: Provides a reliable power source in remote areas where the grid is not available.
- Energy Security: Continuous power supply with a hybrid inverter and substantial battery storage.
- Cost Savings: Reduces reliance on expensive and potentially unreliable alternative power sources (e.g., generators).
- Environmental Impact: Utilizes renewable solar energy, reducing carbon footprint and promoting sustainability.