The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 15, 2025
Filed:
Nov. 12, 2021
Koolbridge Solar, Inc., Wrightsville Beach, NC (US);
Paul Wilkinson Dent, Pittsboro, NC (US);
KOOLBRIDGE SOLAR, INC., Wrightsville Beach, NC (US);
Abstract
A photovoltaic system providing both grid-tie and back-up operation comprises an inverter having a first, voltage-controlled output for powering appliances, and a second, current-controlled output for grid back-feed. The second output may have a current-controlled mode when connected to the grid and a voltage-controlled mode otherwise. The first and second outputs comprise independent switching transistors, which however may be driven by the same switching control signals, such that the voltage controlled-output mimics the voltage on the current-controlled output when it is connected to the grid, and therefore tracks the grid voltage. Grid isolation relays disconnect the current-controlled inverter output from the grid if it fails. A connection bypassing the grid isolation relay is monitored by the controller for the presence and stability of the grid supply when it resumes. Both outputs follow the voltage on the voltage-controlled output when the current-controlled output is not connected to the grid.