Hi, my MPPT charge controller had a crystalline substance pour out of it. I caught most of it. Looks like the base has disintegrated. Barely used and when not in use is stored with cushioning.
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MPPT 75/15 backing has disintergrated - defect??
The "sand" is normal and also the strange looking plastic seems to be normal, it looks similar to this one:
Hi @Harry Kerrison. It is actually silica sand which is used for passive cooling. Occasionally is seems to get in between the adhesive and case making for a poor fit or the adhesive simply was not properly applied. It does not affect the functioning at all. Contact your dealer for a warranty claim if still within the 5 years.
