Dillsue

Your DNO wants to know where the generators are isolated so they can isolate them if they're working on your supply. You probably need a lockable AC isolator on the Luxpower unit and a note stating where in the house the isolator is. A copy of the drawing should be pinned up where the DNOs incoming supply/cutout fuse is located. When our DNO upgraded our transformer they checked the drawing and checked both systems were shutdown although they didn't lock off the isolators. They do actually use the info you give them!

The connections for the 3 way valve only show connections to earth, neutral and auf. Nothing connected to zu

Are you sure it's 5201Z? 6201Z is a common bearing and is the sizes you quote. When you sort out the size you need buy quality brands like SKF, NSK, Timken etc. For the few extra £ you pay, they'll last way longer than cheap s**t off ebay

If its grid connected it needs to be approved and on the ENA database even if set to zero export. I think the Wallbox products are grid connected but maybe you've seen something that isolates the house from the grid??

And support! Start mixing and matching and you might struggle with help from SE

That's it exactly. Check the inverter carries a G100 approval which I think it should. Hook up the energy meter and CT clamp to your supply cable and configure the inverter to your export limit. Technically, to be G100 compliant, the export limitation settings should be password protected by your installer to stop you as the user tinkering!!

Have a look on the ENA type test database- there's nothing from Wallbox approved for grid connection

Not sure the Quasar 2 is released for use yet, outside of trials??

On the subject of RCDs, dont forget they are secondary protection to a properly designed and installed electrical system. Primary focus should be on a decent install.

They have to CE/UKAS mark the products which will involve testing. They can't test their boards with every conceivable DIN rail mounted product from around the world so they can't advise to fit anything other than their own kit, which they have tested. They'd knowingly invalidate the CE/UKAS certification if they endorsed fitting any untested kit.

If you think your neighbours incomplete applications may affect yours, then ask them if they would be happy withdrawing their applications? You can draught up letters for them to sign and send them off to your DNO. No effort for them and may remove hurdle for you??

Personally, I'd write. It's way too easy for them to tell you to reapply over the phone!!

I'd just send the commissioning doc in with a covering letter explaining the history. Unless there's been masses of other generation installed in your area it would be unreasonable for them to renege on the approval

Ah, so you've got a G99 approval and just need to submit the commissioning doc??? No idea what your DNO is like but I filled in and submitted the commissioning doc together with the single line diagram. Was then asked to sign a contract with the specific inverter serial numbers stated within the contract. If you've changed equipment then in principle the original G99 should still be valid so long as you don't go above the approved export limit AND the new kit meets with the current G99 standards.

As professional installers they should know they cant connect more than 3.68kw of potential export without a G99 approval. If you've not paid them, dont! Wait until you have the approval in place before paying them.

My experience with SPEN is its straight forward. Everything on the G99 application is straight forward. The single line drawing of the house electrics may take a bit more research to compile but there's plenty of examples on the Web. Commissioning doc is straight forward too

SPEN. Very easy to deal with.

That's not my experience. I got verbal agreement for 7.2kw in a couple of days subject to an undersize transformer upgrade, which the DNO paid for. Took 6 months to schedule the work and they ended up replacing 3 poles, 150metres overhead cable, transformer, 2 buried copper cable earth loops. 10 men, 2 diggers and half a dozen vans for a day. All up to modern spec EV and ASHP ready. I dread to think what the bills gonna be to electrify the country!!

If you're getting 50% of generation as a export payment then your on the FIT deemed export rate. Once you have a smart meter you can choose to go onto metered export payments or stay on deemed payments, with Octopus seemingly the best payer. Do the sums and see which is the most beneficial. Under the FIT scheme rules you can switch between deemed and metered every 12 months so you're not stuck if you change to metered and it doesn't work out for you.

You probably want to speak to your planning department to see if there's any restrictions on building your own small solar farm. After that speak to your DNO to see how much export they'll allow. Once you know if either or both of those are going to restrict you, you can start designing a system

Early and late generation may not be so important if you've got batteries. Certainly in the winter you want as much generation while the sun is up to charge your batteries and there won't be much generation coming from an east/west array

I'd persevere with Octopus as they are only obliged to pay you SEG at circa 6p/ unit. The 15p Octopus Outgoing is their choice to pay it/not pay it and I'd be surprised if the Ombudsman can do anything other than insist they pay SEG rates

Have you asked your DNO if you can have either or both options?

If you don't want to go the temporary G98 route and you think your loosing a significant amount of export income, then you could add more battery capacity to capture any daytime excess and then export a steady 2kw when the sun goes down.

SPEN previously said- In cases such as yours where the earth loop impedance is relatively high (0.41 Ohms), putting 3.68kW in would cause a problem and it would be wrong of us to to knowingly do this. If you go for G98/3.68kw then it's hard to see SPEN doing nothing after youve sent in your G98 notification. Once they've remedied the problem then there shouldn't be a problem getting 3.68kw export via a G99. If you don't think any of the problems will happen then put in a 3.68 G98 inverter and get a qualified spark to test/witness there's no problems and let SPEN know the sparks findings. What's the issue with a 2kw limit?? Once you've charged your battery you may not actually have that much over 2kw to export for much of the year. If you're concerned about export payments then you may not be loosing out on too many £s over the year.