Quick Answer
Micro-inverter manufacturing has a relatively low environmental impact compared to traditional string inverters, but the production process still contributes to greenhouse gas emissions and resource consumption, primarily due to energy-intensive manufacturing processes and material extraction.
Raw Materials Extraction
Micro-inverter manufacturing involves the extraction of raw materials such as silicon, copper, and rare earth metals. For instance, silicon production requires significant amounts of energy and water, contributing to environmental degradation and local pollution. To mitigate this, some manufacturers are exploring the use of recycled materials or alternative silicon sources, such as silicon from waste solar panels.
Production Process Emissions
The manufacturing process for micro-inverters, including assembly and testing, requires significant amounts of energy, primarily from fossil fuels. According to a study by the National Renewable Energy Laboratory (NREL), the production of micro-inverters generates approximately 250-300 grams of CO2-equivalent emissions per kilowatt-hour (kWh) of installed capacity. This is comparable to the emissions from traditional string inverters but can be reduced through the use of renewable energy sources, energy-efficient manufacturing processes, and waste reduction strategies.
End-of-Life Disposal
At the end of their lifespan, micro-inverters can contribute to electronic waste (e-waste) and pollution if not disposed of properly. Manufacturers are adopting take-back programs and designing micro-inverters for recyclability, reducing waste and the environmental impact of disposal. For example, Enphase Energy, a leading micro-inverter manufacturer, offers a take-back program for its end-of-life products and aims to recycle 100% of its materials.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.