Dillsue

SPEN are the DNO for southern Scotland and the old MANWEB area covering some of the north west and north Wales. Google "DNO network map"

OK. Maybe let them know that their colleagues in the Prenton engineering office dont(didnt) ask for MCS, not even a mention of it!

Absolutely. The comment was clarifying that micro inverters can interface to a battery, same as any inverter can

I believe Enphase do a battery to integrate with their micro inverters

No requirement for MCS with SPEN MANWEB when we submitted our G99 a couple of years ago. Have you been discussing export payments with SP? It's the only reason I can see them directing you down the MCS route if you've told them you want to claim SEG??

Batteries?? They can't export to the grid so no ENA approval needed. Its the inverter that needs to be ENA compliant

Try CEF for your kit. They were selling longi 405s for £52 earlier this year yet cheapest panel on the green2go site seemed to be £70+

For clarity- don't rely on an inverter shutting down as a safe way to isolate any inverter/generator/battery, ever. There's loads of old/cheap and potentially non compliant inverters around any or all of which can go faulty. Lockable AC isolators are specified for a reason throughout the world of electrical power. Of course you can defeat a cheap lock with a hacksaw/bolt cutters/sidecutters, but thats a deliberate act. Putting a fuse carrier back in can be done inadvertently and may not be questioned by whoevers trying to get the supply back on. On the other hand taking a hacksaw to a lock on a locked red and yellow isolator would set alarm bells ringing for anyone with even the smallest degree of electrical competence. Anyone with basic understanding of electrical working can come up with a way of working giving a level of safety that suits them and their appetite for risk. Anyone taking guidance from others on an internet forum should use the installed isolators and lock/cable tie them off if there's anyone else around while you're working on isolated kit.

Yep way easier.......but that's not the way industry works as its not classed as a positive isolation! Nothing to stop anyone inadvertently putting a spare fuse from the van back in. With lockable isolators theres a positive action with a hacksaw required to remove a lock so negligble scope for accidents. Not applying locks was the chargehands call but almost certainly breaching company procedures!!

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