New MCS MIS3002 and PV Guide

[TedM]

These new documents have been published today:

MCS MIS3002 version 3 - http://www.microgenerationcertification.org/images/MIS 3002 Issue 3.0 Solar PV 2013 02 07.pdf

MCS PV Installation Guide - http://www.microgenerationcertification.org/images/PV Book ELECTRONIC.pdf

 

[Ian-LS]

Finally......lots to digest there.

 

[Berneray]

Loads and loads to get to grips with....it will be good to share our understanding of what changes there are..

 

[stevie gill]

Think I may be setting myself up to look like an idiot, but does anybody else find the explanation of how to carry out a manual sun shading analysis highly confusing?

Surely it's just easier to buy a tester that does it for you, or am I missing something (been a long day)????

 

[jerriais]

Just got this from ECA ...

"I have spoken to our technical department and they have advised me that any quotes you have done before today can go under the 2006 guide and any quotes you make from today onwards will need to be under the new guide rules."

I'm off to quote a job in 30 mins, they seriously expect me to go with guidelines that have been published for the first time today!?

I'm getting them to clarify right now....

 

[JulianC]

From the MCS email: "[FONT=&quot]Installation companies will have three months before they must work to the new version of MIS 3002 issue 3.0. Before that date (7[SUP]th[/SUP] May 2013), installation companies can use the new version of MIS 3002 issue 3.0 and the new PV Guide if they choose to do so."[/FONT]

 

[whinmoor]

Just got this from ECA ...

"I have spoken to our technical department and they have advised me that any quotes you have done before today can go under the 2006 guide and any quotes you make from today onwards will need to be under the new guide rules."

I'm off to quote a job in 30 mins, they seriously expect me to go with guidelines that have been published for the first time today!?

I'm getting them to clarify right now....

I think there's a intervening period during which the previous method will still be acceptable:

"Installation companies will have three months before they must work to the new version of MIS 3002 issue 3.0. Before that date (7[SUP]th[/SUP] May 2013), installation companies can use the new version of MIS 3002 issue 3.0 and the new PV Guide if they choose to do so."

 

[Berneray]

I'm just scan reading it to get an overview. First impressions are that this will work in favour of the reputable companies. Because the sharp suited guys will struggle with this.....

Second...Its the shading procedure that seems to be the biggest change........That and the post code zones...

I'm reading it from the SAP cal viewpoint.........

 

[jerriais]

Phew, this sounds more reasonable...

"I’ve had a check with technical again and yes you do have a 3 month period to adopt the new guidelines but you cannot use a mixture of both. I.e. as soon as you’ve started using the new guidelines then you will need to use them for all quotations from there onwards."

 

[pwboston]

looks to me when this takes effect it will be even harder to sell panels.

If im reading this correct utilising the irradiance say for Norwich 35 deg slope and south facing will reduce the yearly calc by near 400 a year, when in reality the SAP2009 we well and truly slaughters that figure even in the worst sunlight year for 100 years. (IE) 4kw system did 3830, when sap 2009 said 3434.

Have i read this right

 

[Ian-LS]

You are incorrect. the SAP kWh/kWp for zone 12 for south facing 35 degree roof is 961 kWh/kWp. Assuming no shading the prediction would be 961 kWh x 4 kWp = 3884 kWh

So in increase of 400 kWh or so

It will make the selling of PV systems easier to an extent. Harder for places like Inverness for those who relied in SAP 2009, we haven't relied on SAP calcs at all up till now although do provide them in our quotes but not used for our performance estimates

 

[pwboston]

So we dont use the 0.8 then?

as per the old 0.8x system size x S x Zpv

is thats the case then great.

 

[Ian-LS]

its kWp x kWh/kWp x shading factor I think

 

[JulianC]

Haven't looked at the new guide properly yet (in a moment of wanton frivolity, I ordered a hard copy for £9.99 off the Elecsa website so will wait for that to arrive and get stuck in with a cuppa) but am I correct in assuming that the shading assessment is more involved at the survey stage? If we will be doing more work in order to submit a quote and component prices are creeping up too, will we see installation prices increase to compensate? Will this damper customer enthusiasm all over again?

 

[whinmoor]

It certainly looks like a shading analysis needs to be performed at the survey stage, preferably from a window below where the array will go. So, yes, more paperwork. Looks like this can be excluded if there's clearly no shading.