Yes, if there is no load on the string there wont be an arc. If there is a normal one string load like 7 amps you should use rubber gloves and pull it apart fast so as not burn the connector.
There are No fuses in line for the dc solar string to the inverter in this design. The DC solar strings are self limiting so one string is about 7.5 amps if you combine two strings they max out to about 15 amps max. You can take a solar string and plug the positive and negative leads into each other like a dead short and power just runs in a loop ax max amps no problem. The inverter is very smart and if there is a leak to ground or arc fault it shuts off the inverter.
Hauwei Gave us an RMA for internal fault. We replace MC4 connectors on the home run strings but those panel mount connectors built in to the inverters would be very hard to replace. Power boards block access to the back of those.
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Thanks for the awesome video. The DC breaker is tripping. Is it safe to disconnect the PV cable connector from the DC Disconnect box on a Sunny day?
Yes, if there is no load on the string there wont be an arc. If there is a normal one string load like 7 amps you should use rubber gloves and pull it apart fast so as not burn the connector.
on this site , it have DC fuse or something to protect before inverter ?
There are No fuses in line for the dc solar string to the inverter in this design. The DC solar strings are self limiting so one string is about 7.5 amps if you combine two strings they max out to about 15 amps max. You can take a solar string and plug the positive and negative leads into each other like a dead short and power just runs in a loop ax max amps no problem. The inverter is very smart and if there is a leak to ground or arc fault it shuts off the inverter.
Also the string wire is sized so 30 amp wire for 7.5 amps full load and 40 amp wire for two combined string running 15 amps
Nice
Bad connector, replace MC4 on input side
Hauwei Gave us an RMA for internal fault. We replace MC4 connectors on the home run strings but those panel mount connectors built in to the inverters would be very hard to replace. Power boards block access to the back of those.