Solar Calc's 400A. Main Buss w/ Main Lugs to Two 200A. Main Breakers

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A couple of points:

  1. The Milbank description is that this panel uses Class T fuses as the main device, not breakers. Therefore, if you need to connect more than 40A of PV you can simply change the fuses to lower current in the same size (110, 125, 150, and 175A fuses will fit and can be used). Others have described the situation.
  2. As long as there is that 15A circuit breaker as a load, the 120% rule applies.
 
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