The making of a clean energy prosumer: Part three – pv magazine USA

by | May 31, 2022 | Energy

This article series describes my journey from a standard consumer to a prosumer and from owning a gasoline-powered vehicle to owning an electric vehicle (EV).Dr. Ahmad Faruqui Image: Twitter I was led to making these two decisions to lower my ever-rising electric and gasoline bills, to enhance the resilience of my house to power outages, and to promote clean air.The report includes economic analysis behind the decisions, explains what it took to implement them, and provides the results during the time that has elapsed since I became a prosumer and EV driver.The economics of being a prosumerThe picture below shows the 25 solar panels I have installed on my roof. They have a total capacity of 8 kW. Image: Ahmad Faruqui The next picture shows the SolarEdge inverter which converts the DC power coming from the panels into AC power that ultimately feeds into the house, and if there is a surplus, feeds into the grid. Image: Ahmad Faruqui Here is a picture of the battery which is attached to an exterior wall which faces the patio. Image: Ahmad Faruqui Every morning, as the sun rises and strikes the panels, they generate DC power and feed that into the battery. Once the battery is fully charged, the panels feed power to the house, with the DC power going through the inverter. If the house needs are less than the power being generated from the panels, as begins to happen in the early afternoon hours in most months, the excess power is exported to the grid. As the sun begins to decline, when the power generated from the panels falls short of the needs of the house, the battery begins to supply power to the house. It keeps doing that until it is down to 30% of charge. Then it goes into standby mode, and will provide power to five essential circuits in the house in the event of a power outage.This sequence of events is shown below. Image: Ahmad Faruqui When an outage occurs, the battery begins powering the house. One such instance happened at 9:05 pm on June 20. The sun had gone down. The panels were not producing power. The battery had 60% power stored in it. It began to discharge power to the house.My solar power production and household energy consumption data for 2021 are illustrated below on left; the comparative data for 2019-2010 is on the right. In 2021, the …

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