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Grid Tied Inverter Installation.

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I have been forced to forgo my international fashion modelling career and judging the Pekinise gate jumping trials in Scunthorpe, to install a grid tied inverter. I suddenly realised that I don't know anything about them beyond the theoretical. Apparently the system is a 5kW one.

 

Private solar panels are to be installed on a barn roof in the open flat countryside. Horses live in the barns/stables. The barns have a sub-main fed from a farm house TT earthed. Two residential caravans are located next to the barns. The barn owners are going to install the solar panels. I am required to just wire up the grid tied inverter.

 

Do I just bung in a B16 into the submain board, and a couple of isolators and hope for the best?

 

Do I need to consider lightning protection, S.P.D.s etc?

 

P.S. We get lots of flying insects in our homes in the sticks. Tip: If  using a hanging sticky flypaper, do not hang it below head height above your desk chair. I should know.

 

Z.

 

 

 

 

 

 

 

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    Jam: 
     

    It is worth noting that G99 conditions apply if more that one 3.6kW grid tied inverter is connected at a single premises and must get prior approval for the connection. 

    I think the 3.6kW limit is only for single phase - 3-phase would be allowed up to 11kW.

    As noted by others earlier, strictly the actual limit for G98 is 16A per phase at 230/400V. This is, in effect, 3.68kW single phase or 11.04kW three phase, but the definition in terms of current, not power, is sometimes relevant.

    You also need to be careful of neutral currents if you fit single-phase inverters in a three-phase installation. If one phase is loaded up, a but of load on a second phase, and nothing but export on the third phase, you can end up with a larger neutral current than you designed for.

    Using three-phase inverters in a three-phase installation helps avoid this.

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  • 0

    Jam: 
     

    It is worth noting that G99 conditions apply if more that one 3.6kW grid tied inverter is connected at a single premises and must get prior approval for the connection. 

    I think the 3.6kW limit is only for single phase - 3-phase would be allowed up to 11kW.

    As noted by others earlier, strictly the actual limit for G98 is 16A per phase at 230/400V. This is, in effect, 3.68kW single phase or 11.04kW three phase, but the definition in terms of current, not power, is sometimes relevant.

    You also need to be careful of neutral currents if you fit single-phase inverters in a three-phase installation. If one phase is loaded up, a but of load on a second phase, and nothing but export on the third phase, you can end up with a larger neutral current than you designed for.

    Using three-phase inverters in a three-phase installation helps avoid this.

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