Ensure the battery voltage is at least 9V. If the battery is too dead, the controller cannot power itself on. The Solar LED is off during the day Check the PV array for shading or debris.
Do not guess the wiring. Incorrect connections will instantly destroy the internal shunt and MOSFET array. Bp Solar Gcr 1200 Manual
BP Solar exited the photovoltaic manufacturing business years ago. Their old domain (bp.com/solar) no longer hosts legacy product PDFs. Consequently, the original GCR 1200 manual has become a rare collector’s item—yet it remains essential for keeping this 12V/24V PWM controller operational. Ensure the battery voltage is at least 9V
Disclaimer: This article is for informational purposes. BP Solar no longer supports this product. Work on live solar equipment at your own risk. Bp Solar Gcr 1200 Manual