GRID TIE CHARGE CONTROLLER

摘要

A system extracts power from a typical high voltage (200-500 vdc) grid tie solar system and deliver it to a low voltage (12-24 vdc) battery bank. This product parallel connects in between an existing grid tie solar array, and an existing grid tie inverter, transforming the voltage down, and acting as a charge controller, engaging and disengaging as necessary to keep the low voltage battery bank at a high state of charge. This system enables the grid tie PV array to have a second use as the energy source for a low DC voltage off grid system. This system, when combined with standard low DC voltage grid inter-active off grid inverter/charger, and a battery bank, forms a complete off grid system, while allowing the host grid tie system to function normally when the grid is on.

主权项

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; 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; 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.