We believe that solar systems should be simple, safe, and reliable. Every customer should have choices when it comes to equipment, based on healthy competition in the market. In our vision, codes and standards do not limit options but allow for a level playing field. Module Level Shutdown (MLSD) can be chip-based, module integrated and based on SunSpec, an open industry standard that enables innovation, competition and customer choice. This way, the benefits of MLSD for service technicians and fire fighters are balanced with solar installer protection, simplicity and affordability of systems, as well as overall safety and reliability.
The 6 principles outlined below define a better way for the solar industry:
Good module level shutdown solutions are integrated into the module junction box
To keep systems safe, simple and reliable, it is best to integrate the shutdown function into the module - this eliminates extra installation steps as well as added components and connection points (therefore not reducing fire safety as the current solutions do).
An open industry standard is best for customers
Open industry standards ensure interoperability across systems and allow for innovation and customer choice. To integrate shutdown solutions into the module in a feasible way, an industry standard is the way to go.
Every module level shutdown solution needs to be tested to a proper switching standard
Since Module Level Shutdown is for firefighter safety, solutions have to be reliable when needed. When Rapid Shutdown is activated, the module level shutdown switches must reliably switch and de-energize the array.
Shutdown solutions shall not create electrical noise that compromises arc fault detection shutdown signals
Every added component in a solar system can create electrical noise, which can compromise the arc fault detection or shutdown response. Thus, solutions shall not exceed noise levels that can create these problems.
The less connection points, the better
Fewer connection points mean less risk of installation errors; mismatching and thus arcing and potential fires. The less connection points a shutdown solution requires, the better.
Affordability is key to keep solar growing
Cost-effectiveness drives the adoption of Solar Energy - the more affordable solar is for customers, the quicker we will be able to transition to a renewable energy supply system. Simpler solutions allow for lower cost.
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