Yes ELVs <50Vdc.  IMHO its sheer madness to be involved with MV dc Panel strings - way too dangerous  IMHO in a domestic environment, and we dont have the skilled tradesmen to recognise this type of micro grid nor is there a recognised route to upgrade to this unfamiliar but hazardous system.  Way too many unschooled wannabees playing with fireworks.  It is utter negligence by our Political leaders to allow this to continue.  They only woke up to the hazards of amateur plumbers who didnt understand flammable atmospheres till a few houses were blown up flattened.  Then British gas had to step in a institute proper training courses with local tech colleges.  Where do our Electricians get proper upgrades?  A one man jobber cant afford an apprentice (with all the paperwork and oversight involved). He will only have a family member or friend involved.

I would hope that most domestic installs would be done by an MCS approved, qualified electrician.  If nothing else, you'd struggle to get export payments on a DIY system.

I've checked the logs from my system today.  It has two series strings, and each produced up to about 4A at 350V.  Nothing that an ordinary electrician couldn't handle.  It's well within the limit for LV.

Where do our Electricians get proper upgrades?

There seem to be quite a few courses available - e.g. https://www.napittraining.co.uk/courses/trade/renewables, https://www.tradeskills4u.co.uk/product-category/solar-pv-courses or https://gtec.co.uk/courses/renewable-energy-training/solar-pv-training-course and lots of others many based on City & Guilds qualifications - e.g. C&G 2399. Try google.

   - Andy.

Octopus Energy recently updated their T&C’s to remove the requirement for an MCS Certificate, The SEG terms already had alternatives to MCS.

I am aware of two installs without an MCS cert who do get Export payments.

However, SEG and export are not worth the aggravation for the payback these days.

In a good amount of cases you can get a far better installation by going to a good quality electrician rather than an MCS installer - the shocking statistics on poor installations would seem to support this. 

So, how many accidents and from how many installations? To be worth acting on it has to be a lot more dangerous than falling down stairs, or perhaps being run over, as for normal persons we consider that an acceptable risk.(*)

I will point out that there are not enough accidents prevented to justify Part P, and I suspect there aren't really enough to justify gas-safe either, certainly when comparing with countries in which no such regulations exist but to suggest removing either would be political suicide, so we are stuck. I'm not sure we want another set.

Mike.

(*) most adults approaching middle age will know of at least one person lost in a car crash or similar. Some will know more than one. less than 1% will personally have known someone electrocuted or killed in a gas explosion - it is just so rare it ends up as headline news.

So, how many accidents and from how many installations? To be worth acting on it has to be a lot more dangerous than falling down stairs, or perhaps being run over, as for normal persons we consider that an acceptable risk.(*)

I will point out that there are not enough accidents prevented to justify Part P, and I suspect there aren't really enough to justify gas-safe either, certainly when comparing with countries in which no such regulations exist but to suggest removing either would be political suicide, so we are stuck. I'm not sure we want another set.

Mike.

(*) most adults approaching middle age will know of at least one person lost in a car crash or similar. Some will know more than one. less than 1% will personally have known someone electrocuted or killed in a gas explosion - it is just so rare it ends up as headline news.

mapj1 said:

I will point out that there are not enough accidents prevented to justify

IMHO you need to look at the fallacy of that statement - how do you measure the number of accidents prevented when they didnt happen?