研究目的
To analyze the field collected data from a prototype photovoltaic power system in Nauta, Peru, to assess its current health and functionality, and to discuss an unexpected issue with the loads and batteries, including possible causes and potential solutions.
研究成果
The analysis revealed that the photovoltaic system was functioning near full capacity in terms of solar yield but experienced issues with battery state of charge due to increased energy consumption and early battery failure. Recommendations for future improvements include upgrading the system components, such as adding more solar panels, a larger inverter, and a new lithium ion battery pack, as well as improving the battery enclosure to protect from high temperatures.
研究不足
The system's performance was affected by the early failure of the batteries, likely due to exposure to high temperatures from direct sunlight. The analysis was also limited by the availability of local solar data, with the closest data coming from Lima, Peru, several hundred miles away from Nauta.
1：Experimental Design and Method Selection:
The system was designed and installed by a team from George Fox University in the summer of 2017, using Victron devices for power electronics and data collection due to their availability, quality, durability, and communication capabilities.
2：Sample Selection and Data Sources:
Data was collected from the system over almost two years of daily usage, focusing on solar yield, consumption, and battery state of charge.
3：List of Experimental Equipment and Materials:
The system included six Yingli 310 W solar panels, a Victron Phoenix 24 V, 3000 W inverter, a Victron Smart Solar MPPT Charge Controller, a Victron Color Control Module, and four 12 V, 230 Ah sealed lead-acid batteries.
4：Experimental Procedures and Operational Workflow:
The system was monitored remotely via the Victron Color Control Module and VRM Portal, with data uploaded weekly when connected to a phone's hotspot.
5：Data Analysis Methods:
The data was analyzed to determine system performance, with specific attention to solar yield, energy consumption, and battery state of charge, using both the Victron website's auto-generated plots and manually created plots from downloaded raw data.
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