The first is the pv disconnect or array dc disconnect.
Solar panel dc disconnect switch.
Pv system arrays generate dc current and need to be disconnected for maintenance or safety.
The second disconnect is the ac disconnect.
A solar pv system typically has two safety disconnects.
Some us locations require a disconnect switch.
Solar safety disconnect switch nonfusible heavy duty 30 amps voltage 600vac dc negative ground polarity 3 phase 1 nema enclosure type 20 ip rating indoor material of construction aluminum alloy contact form 3pst number of wires 3 number of poles 3 height 11 10 in width 6 60 in depth 5 10 in standards ul listed file e335018 ul1741.
The pv disconnect allows the dc current between the modules source to be interrupted before reaching the inverter.
New installations of solar photovoltaic systems have increased the need for disconnect switches and over current protective devices capable of interrupting currents at voltages up to 1000 vdc.
Enzpower ip66 solar system solar combiner box 32a pv dc isolator switch with solar connector for solar power system rv boats and off on grid solar system 4 7 out of 5 stars 13 105 60 105.