Dillsue

And if the home built untested/certified mish mash doesnt shutdown when the grid is down,what happens to the linesman trying to fix the fault down the road?

The posts above using a Leaf for V2H/G both use a Quasar or Indra unit which seem in short supply second hand and aren't available new. Anyone aware of any other units to hook up a Leaf without modding the car? Ideally grid tied but I think that's not yet legit outside of the official trials??

Thay don't need to approve what you're connecting so long as it's G98 type tested and on the ENA database. Just notify them once it's connected. Anything else needs prior permission via G99

Bear in mind that, AFAIK, both those bi directional chargers are grid tied so should shut down when the grid goes down and wouldn't work in an off grid set up, if that's what you're after.

Is that all UK models? Do you have a reference for that? I've been looking at maybe using V2X in the future and all I can see for the leaf is post 17/18 models that support it in the UK

There's a similar thread in the PV section about sizing off grid systems so have a read. I don't believe your Leaf supports exporting from the car to external load so you'd likely be looking at modding the car to get access to the battery. I think it's the 40kwh version from 2017/2018 that support export???

By all means tinker with PVGIS but it's output is meaningless if you don't know what your consumption is. You need to work out your daily demand. Assuming you're not currently living in a doorway, get yourself one of the basic plug in energy meters and start to understand what each bit of electrical kit consumes over a day. Then you can add everything up and have an idea of how much you consume. If you're on your own metered electric supply, take daily readings and youll know exactly now much you are using per day. Generators are cheap to buy if you want to be fully off grid, but why? For a couple of hundred £ a year standing charge the security of a grid connection is a bargain. You don't have to take any electricity from the grid but it's a nice bit of insurance to have. Obviously if there's not already a supply where you're living there's a connection charge.

Remember that in summer your usage is likely low and potential generation is high. In winter its the reverse so if you spec a system for worst case winter load, it'll massively overproduce in the summer. Are you properly off grid as in no grid connection available or just want to be more independant?

If its a feed to the hot water tank, you'll likely want the heat from the heatpump to go to the tank rather than heating the air even if its within the thermal envelope. If the pipes aren't insulated you're giving the HP more work to do at a time when it'll likely be running at a poorer COP heating to a higher temperature for the hot water.

AFAIK if its not on the ENA database showing as compliant then it can't be connected to the grid under G98. Type testing is the manufacturers responsibility and certainly for the Solaredge inverters I have its a third party that have done the testing and issued a certificate of compliance. When its compliant the ENA listing has a link which opens up the type test cert.

And if you put one in each window??

I don't know if CCS will work at scale but clearly some do as there's a 3 foot dia CO2 pipeline planned to run past us next year to dump CO2 in disused gas fields off the N Wales coast.

Not sure it's going to be state owned but last BEIS forecast figures I saw for gas generation showed 19% in 2040 and 14% in 2050, hopefully all with CCS.

We produce annually way more than we use but I'd never consider myself independent. What does Scotland do when the weather is calm?

Yep it's a lot of hoops to jump through with a fair price tag compared to what you're gonna get back. BC sign off, elec cert, £250 fee probably not short of a grand to get on their export rate of 15p/unit.

Yep, in the email they sent me and anyone else who had registered an interest in non MCS export.

You'll not go far wrong in following Octopus's trial process for accepting non MCS systems onto there export tariffs. They are asking for proof that the roof can take the load by way of building control sign off, and an electrical installation test cert.

If youre not modifying the GSE trays and fitting panels to GSE spec, then why would you need to change the GSE intended ventilation? On a still summers day there wont be any wind rushing around to cool the panels so you'll just be relying on convection

You keep mentioning "application" but if you're under 16amp max export its a G98 notification. All the DNOs should be working to the ENA G98 specs so there should be little difference in what you submit. For us, SPEN wanted- Single line diagram of the house wiring specifucally showing the location of the lockable PV isolator, which is what youve got. Completed commissioning form with the signature of whoever checked the install which should be your spark although thats not always the case. Details of the ENA type test certification for your inverter(s) BTW your roof install looks neat

You need to calculate the DC output from your split array before you speak to your DNO. Telling them you've got 9kw of panels, which you'll never get 9kw of generation from, is much more likely to get a refusal than say a calculated max of 5 or 6kw As johnmo mentions you can have any size inverter you want if you install export limitation. That set up allows you to power the house with as much as you can draw from your PV/batteries but only export what your DNO has agreed.

You'll likely get those on single phase easily as they don't all hit max generation at once and you'll do well to get 3kw out of the NE array. If you put each array into PVGIS separately, download the hourly figures for each of the 3 arrays then use Excel to combine the 3 data sets, you'll be able to see what your max DC generation is. You'll then be able to size your inverter. One of our 2 systems has 8.5kw of panels spread over 3 compass points and the calculated max output is 5.4kw You've already mentioned Solaredge and their inverters will handle way more input than the inverters rating, so you can have a seemingly large array hooked up to seemingly small inverter. What's the peak demand that you need for the house?

How much PV have you got on each pitch and what direction is each pitch facing?

If you "tee into the shed feed" your calcs go out of the window as you ve got 8.5 kw in the section of cable from garage to inverter. You're probably best getting a spark to spec all this for you and test it when it's done

Extensions to a FIT system don't have to be by an MCS installer. If they are MCS installed then you can get SEG for the additional capacity. If they aren't MCS then you can't get SEG. The original FIT registered capacity continues to get FIT generation payments and the option of deemed or metered(SEG) export payments. Deemed export is only available if you're on the FIT scheme. SEG is always metered through the service meter, not the generation meter. Maybe changes on the way for non MCS extensions if Octopus decide to buy non MCS export......... a while off and a few hoops to jump through though

If your hubby is an electrician then he just needs a roofer to help with the roof work and DIY is straight forward. Buy or borrow a used scaffold tower and flog it afterwards. You'll likely pick up a 4.5kw kit(excl battery) for under £3k and the parts for much less if you are prepared to wait and buy as things as they come up on ebay