1. Enclosure: A direct impact on the life of the combiner.
Most combiners box are installed outdoor, IP65 IP66 degree is important.
UV resistance and good flame retardant for PC plastic enclosure.
The larger enclosure for better cooling of internal components.
2. True DC components for solar PV.
As TOP 1 solar DC components manufacturer in China, the solar combiner box is equiped with TRUE DC disconnect switch, 1000V DC surge arrester which is used in SolarEdge Inverter too and Finger safe touch 1000V DC fuse holder.
The fuse should be TOP brands from LITTEL or Bussmann.
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