Option To Leave Out Pv Ac Isolators

[sparkytim]

So what is the consensus on this idea then, (summer Switched on magazine Page 18)

For those with no copy yet it suggests that IF a DOUBLE POLE MCB or RCBO is used within the Consumer Unit for the AC feed in from a small scale PV system then BOTH the AC isolators traditionally fitted, One at the Invertor and the other at the Generation Meter are not required.

 

[binky]

tend to work like that anyway, but most of out installs use a mini-CU to avoid duff electrics, and because we frequently run down the external wall straight into meter box. To me a main switch, which can be locked off with the right lock, is as good an isolator as a big round red thing. I tend to fit AC isolator at CU end only if it isn't clear what is the PV system - its more viual aid than a technical need to my way of thinking....

 

[binky]

MCS guideline is rotary isolator lockable in off position only, but it seems a bit overkill unless inverter is shoved somewhere inaccessible like the attic.