Littelfuse, Inc.
Calculating Solar Fuse Sizes for Optimum Protection

Calculating Solar Fuse Sizes for Optimum Protection

Every photovoltaic (PV) power application must use fuses that are properly sized to its system. When you use the incorrect fuse size (or a standard non-PV fuse), you put the system’s reliability and safety in jeopardy.

Fuses can only provide proper protection against reverse currents and circuit faults (which can cause personnel injury, power outages, equipment failure, and property damage) if they are the correct size for the system. The maximum circuit current and system voltage are important factors to determine which fuses can protect these systems. PV applications require fuses that can protect against overcurrents, reverse currents and short circuits, against which standard fuses would not provide adequate protection. Therefore, you must use fuses that are specifically designed for PV installations.

Download this paper to:

  • Discover the unique characteristics of solar fuses
  • Gain insights into how fuse sizes affect PV applications
  • Learn how to calculate the correct fuse size to obtain maximum protection
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