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Grid tie charge controller

  • US 9,948,137 B2
  • Filed: 07/13/2015
  • Issued: 04/17/2018
  • Est. Priority Date: 07/22/2014
  • Status: Active Grant
First Claim
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1. A grid tie charge controller system for an existing high-voltage photovoltaic array comprising:

  • a. a grid tied charge controller connecting in parallel between the existing high voltage photovoltaic array and an existing high voltage gird tie inverter, wherein the grid tie charge controller is configured to retrofit “

    tap in”

    to an existing grid tie photovoltaic system to draw off power to charge storage batteries, wherein the grid tie charge controller is diode isolated on the input and output;

    b. a transformer transforming a high voltage of between 200-500 vdc of the photovoltaic array down to a battery bank, wherein the battery bank is a low voltage high current 12/24 v battery bank, wherein the battery bank powers a low voltage off grid system;

    c. an automatic charge control circuit governing the battery bank that engages and disengages as necessary to maintain the battery at a preset charge state, wherein the automatic charge control includes a temperature compensator of a disengagement point;

    wherein the grid tie charge controller system enables an existing high voltage solar array that is part of an existing grid tie system to support an auxiliary functionality of powering a low voltage off grid system, when power is interrupted.

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