July 10, 20214 yr Good Day I need assistance please on the attached diagram, please indicate if you think it is legal and off grid. I will appreciate your views. A COC has not been issued yet. Regards Pieter
July 10, 20214 yr Author The drawing was provided to me by the installer, It seems that the inverter itself is not grounded. The OUT 1 to the Hager do have an earth wire. I am not aware of what is between the Hager and DB. I see it is not indicated on the diagram.
August 16, 20214 yr The drawing provided is a standby alternative supply SSEG system and not off grid. Off grid systems is totally seperate from your house wiring. Why it is called alternative supply is because your DB board either get a supply from the PV system or from the grid. This system is legal in the City of Cape Town area. In the old day it was called off-grid but City of Cape Town changed it to stand-by due to the confution people have with off-grid systems
August 16, 20214 yr 57 minutes ago, flashatstar said: standby alternative supply SSEG system and not off grid. SSEG used to stand for Small Scale embedded generation. When was this changed?
August 18, 20214 yr So to be clear, this system is a standby SSEG - alternative supply and not a standby SSEG passive UPS as an off grid hybrid SSEG (grid assisted and interconnected with electrical installation) I ask too as need to register with the CoCT and have for the most part the same install just another L+N suppling the inverter. Did you installer omit the AC in to the inverter?
August 18, 20214 yr If you look at the drawing the change over switch switched from Eskom or COCT to the DB board then when you switches the change over switch it completely cuts off the grid and the DB board now get a supply from the inverter. This is the reason they call it an alternative supply. You will also notice that the inverter never gets a supply from the DB board A UPS get a permanet supply from the DB but the inverter must conform to the SANS code (cannot remember the number) for UPS systems
August 18, 20214 yr Also note the operation of the change over switch is not clear. If you hand in this drawing the COCT may ask you to draw in the blades of the change over switch.
October 17, 20214 yr On 2021/07/10 at 6:24 PM, PieterB said: I need assistance please on the attached diagram, please indicate if you think it is legal and off grid. I will appreciate your views. A COC has not been issued yet. Regards Pieter Hi Pieter, did you manage to get a answer if this system is considered off grid? To me it looks off grid as there is no link between Eskom and the Inverter.
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