Most outdoor electroluminescence (EL) imaging of solar panel defects is performed at night to avoid noise light from the sun overwhelming the signal from the panels. We present a low-cost approach to taking low-noise EL images in high- noise conditions using IMPEL software which controls both the high- resolution camera and the power supply. An image pair is captured with the power supply on, then off, and a Difference image is generated by subtracting these images on a pixel-by-pixel basis to remove noise