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Earthing/grounding of PV System


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I am going to install my first Ongrid solar system that will export electricity to the national grid as well. 

I have following 3 x questions

1. Can I connect negative terminal of my PV array with earth/ground system? 

2. Can I connect the lightning arrestor with DC earth/ground system? 

3. Can I connect the neutral of inverter with the AC earth/ground system. 

Note: as per the utility company requirements there needs to be two seperate earth/ground electrodes buried in the ground (1 for each DC side and AC side of PV system) for protection of system from surges and fault currents. 

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22 hours ago, Muhammad Ahmed said:

1. Can I connect negative terminal of my PV array with earth/ground system? 

Only it regulations or the equipment manufacturers require you to. If not, dont do it. 

22 hours ago, Muhammad Ahmed said:

2. Can I connect the lightning arrestor with DC earth/ground system?

Yes, any earth will do. 

22 hours ago, Muhammad Ahmed said:

3. Can I connect the neutral of inverter with the AC earth/ground system

Most inverters will complain about this. If the inverter has its own Grounding relay, do not connect the neutral to Earth, the inverter will take care of it once the grid fails. 

 

22 hours ago, Muhammad Ahmed said:

Note: as per the utility company requirements there needs to be two seperate earth/ground electrodes buried in the ground (1 for each DC side and AC side of PV system) for protection of system from surges and fault currents. 

May I ask where you stay, this isn't a common requirement.

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