Plug in solar

[ebee]

I will not muddy the waters by suggesting that a bog standard house is one circuit (from the cut out) - remove that fuse and you have lost that one circuit.

Ignoring the fact that you might add wind, rain or sun (or a squirrel running in a cage wheel) as an alternative or an extra supply.

 

[JohnW2]

I will not muddy the waters by suggesting that a bog standard house is one circuit (from the cut out) - remove that fuse and you have lost that one circuit.

Quite so. I wouldn't call that "muddying the waters" since it's really just explaining, by example (I've used different examples), why the BS 7671 definition of "a circuit" is not really fit for purpose

Kind Regards, Johnel running in a cage wheel) as an alternative or an extra supply

 

[denso13]

Given two OPDs [say an MCB in the CU followed by an FCU (with fuse) somewhere along the length of the 'physical' circuit run (i.e.'all the wiring') ], the upstream device (MCB in CU) will, indeed (per BS7671) define the entirety of that 'physical circuit' (including any branches or unfused 'spurs'). However, the other OPD (fuse in FCU) will define everything downstream of the OPD as being the entirety of one circuit, thereby leaving eveything upstream of the FCU as being a separate, second, 'circuit'!!
So, depending upon how one looks at it, such a situation can satisfy the BS7671 definition of one circuit OR of two circuits

I do get all that but I still think, for a DIY install, then it would be everything that the CU MCB turns off.

 

[denso13]

will not muddy the waters by suggesting that a bog standard house is one circuit (from the cut out) - remove that fuse and you have lost that one circuit.

Or remove the substation fuse and a whole area goes down. Does that mean one circuit covers multiple houses?

 

[ericmark]

The arguments simply show how plug in solar can't fit every situation. All the trade bodies recognised this, but as they found out first in Germany, and then here, if you don't legalise it, people will use it anyway. So better to legalise and lay down some rules, than to let it be used with no or little control over what is fitted, it was a case of risk assessment.

If I wanted to fit plug in solar, I would first install a socket near to where the solar is to go, and likely piggyback on a 16 amp RCBO already supplying an outside socket, which does not have essential equipment like a freezer already connected to it, so really it would not need to be plug in to start with.

 

[denso13]

The arguments simply show how plug in solar can't fit every situation.

Of course, no one has ever said it did.