A bit of advice

[hasel5]

Hope to get some advice about the following

Have just done a Distribution board upgrade in a domestic property with solar PV and was a bit concerned on following

When DNO supply was isolated i assumed there would still be a 230v AC source at the Distribution board via the inverter in the loft?

There is a 20a 230 AC isolater at the intake which was feeds into the board Via an 15a MCB from the loft when switched of the isolated is only live on the outgoing way from the MCB and no power on the side from the inverter feed supply is this correct?

Dont deal with PV very often but thought this should be the case answers appreciated

Regards Nick

 

[Worcester]

The inverter should be a 'grid connected' inverter so when the grid is turned off, it should shut down (can take a few minutes though...) it will then monitor the grid untill it becomes live / stabilises and three minutes later connect itself back on.

For safety purposes you should isolate the inverter from the grid. Most often (though not a requirement) there will be rotary isolator close to the CU, turn it off and lock it off.

To be MCS compliant, there SHOULD have been 'dual supply' stickers on the main board advising where the second supply (the PV) isolator is, if it isn't adjacent to the CU then there should always be one adjacent to the inverter.

Hope that helps

 

[hasel5]

Thanks for the answer makes sense now as it must of shut down when i killed the dno supply was a bit concerned all the labels were there so happy days