ProDave Posted April 24, 2023 Share Posted April 24, 2023 Has anyone done a G98 or G99 application recently? The rules were supposed to change about now so most cases the customer does not have to pay for any necessary network upgrades. Link to comment Share on other sites More sharing options...
Dan F Posted April 24, 2023 Share Posted April 24, 2023 1 hour ago, ProDave said: Has anyone done a G98 or G99 application recently? The rules were supposed to change about now so most cases the customer does not have to pay for any necessary network upgrades. About to do one. G98 is still quite limited, but there are now three flavours of G99 fast-track which I think will cover most domestic installs. https://connections.nationalgrid.co.uk/get-connected/solar-and-wind/fast-track-g99/ SGI-2 and SGI-3 are both before-install applications, but in theory, it's a 10-day response time. 1 Link to comment Share on other sites More sharing options...
Rob99 Posted April 24, 2023 Share Posted April 24, 2023 4 hours ago, Nickfromwales said: Also going to Tigo everything, but prob only one optimiser per 2x panels vs 1x per panel. Have been doing some research into panels and optimisers for my planned PV and there seems to be a view now that, unless you have some really bad shading issues, optimisers don't help output that much (and can reduce it) as modern panels and decent inverters (e.g. your sunsync) are very good at managing shading now. Apparently there's also been some major firmware issues with some Tigo optimizers which causes issues. Blog here. Link to comment Share on other sites More sharing options...
Rob99 Posted April 24, 2023 Share Posted April 24, 2023 24 minutes ago, Dan F said: there are now three flavours of G99 fast-track which I think will cover most domestic installs The process depends on your local DNO. For mine, where UKPN are the DNO, they have an online process which will give you automatic approval for install and inform for anything up to 5kW. Higher and it is an application and wait for approval process. Another classic case of making things inconsistent across the country!! 1 Link to comment Share on other sites More sharing options...
Nickfromwales Posted April 24, 2023 Share Posted April 24, 2023 1 hour ago, Rob99 said: The process depends on your local DNO. For mine, where UKPN are the DNO, they have an online process which will give you automatic approval for install and inform for anything up to 5kW. Higher and it is an application and wait for approval process. Another classic case of making things inconsistent across the country!! I will simply do this based on the inverter being dialled down to the requisite for fast-track, and then ( as it's a hybrid ) I can bolt on as many panels as I like, and same with batteries. Soon find out what WPD have to say!! Link to comment Share on other sites More sharing options...
Nickfromwales Posted April 24, 2023 Share Posted April 24, 2023 1 hour ago, Rob99 said: Have been doing some research into panels and optimisers for my planned PV and there seems to be a view now that, unless you have some really bad shading issues, optimisers don't help output that much (and can reduce it) as modern panels and decent inverters (e.g. your sunsync) are very good at managing shading now. Apparently there's also been some major firmware issues with some Tigo optimizers which causes issues. Blog here. I have to, as there will be 4 separate 'arrays', with a fragmented mix of SE / SW / SSE and E to give me as long a solar day as possible. I'll look at that blog, thanks, appreciated. Link to comment Share on other sites More sharing options...
Rob99 Posted April 24, 2023 Share Posted April 24, 2023 2 minutes ago, Nickfromwales said: I have to, as there will be 4 separate 'arrays', with a fragmented mix of SE / SW / SSE and E to give me as long a solar day as possible. Ah yes, makes sense otherwise you'll need 4 seperate strings and AFAIK inverters tend to come with 2 MPPT max 1 Link to comment Share on other sites More sharing options...
SteamyTea Posted April 24, 2023 Share Posted April 24, 2023 17 minutes ago, Nickfromwales said: I have to, as there will be 4 separate 'arrays', with a fragmented mix of SE / SW / SSE and E to give me as long a solar day as possible. Why not 2, 2 string inverters? Then split up as you were going to. Link to comment Share on other sites More sharing options...
Bramco Posted April 24, 2023 Share Posted April 24, 2023 44 minutes ago, Nickfromwales said: I will simply do this based on the inverter being dialled down to the requisite for fast-track, and then ( as it's a hybrid ) I can bolt on as many panels as I like, and same with batteries. Soon find out what WPD have to say!! Be interested - assume you'll report back. I've got 1 string of ours functional, so under the 4kW limit but will hopefully have the 2nd string working in a week or so - the last panle on the pallet was smashed, so trying to get a replacement.... Simon Link to comment Share on other sites More sharing options...
Bramco Posted April 24, 2023 Share Posted April 24, 2023 On 25/02/2023 at 10:33, ProDave said: Wait until after April. If your test comes out worse than 0.18 ohm, then they will likely say you need a network upgrade. If you applied for that today, there would be a cost. But it looks like after April you may not have to pay for network upgrades. See this thread: I will be watching for how people find this situation after April, I would like more PV myself but don't want to pay for a network upgrade that I don't think I actually need as I have no intention of exporting anything. Is 0.18 still a requirement? We're at 0.22 from the electrical certificate from the build. So quite a bit above 0.18. Simon Link to comment Share on other sites More sharing options...
Nickfromwales Posted April 24, 2023 Share Posted April 24, 2023 2 hours ago, SteamyTea said: Why not 2, 2 string inverters? Then split up as you were going to. Twice the fecking price, that’s why lol!! I’ll be north of 12.5kWp but as it’s fragmented I can push the 8.8kW inverter to 140% without issue. Doubt very much I’ll ever see as much as 10kW at the inverter at any one given time. Link to comment Share on other sites More sharing options...
SteamyTea Posted April 24, 2023 Share Posted April 24, 2023 1 minute ago, Nickfromwales said: Twice the fecking price, that’s why lol!! How much are the Tigos? Link to comment Share on other sites More sharing options...
Rob99 Posted April 24, 2023 Share Posted April 24, 2023 41 minutes ago, Nickfromwales said: 8.8kW inverter What sunsync inverter model did you go with? Link to comment Share on other sites More sharing options...
MikeSharp01 Posted April 24, 2023 Share Posted April 24, 2023 4 hours ago, Nickfromwales said: Blog here. That's an interesting read.... Link to comment Share on other sites More sharing options...
Nickfromwales Posted April 25, 2023 Share Posted April 25, 2023 19 hours ago, MikeSharp01 said: That's an interesting read.... Kudos to @Rob99 1 Link to comment Share on other sites More sharing options...
Nickfromwales Posted April 25, 2023 Share Posted April 25, 2023 23 hours ago, Rob99 said: What sunsync inverter model did you go with? I’ve not purchased yet. I’m just about to do a slab for the garden studio / office where most of my panels will reside. The one I’m fancying is; https://www.sunsynk.org/8kw-hybrid-inverter 1 Link to comment Share on other sites More sharing options...
Nickfromwales Posted April 25, 2023 Share Posted April 25, 2023 Need multiple inputs for2 strings of panels, batteries, generator and mains. Working out configurations in the background with some solar buddies, in my ‘spare’ time. Link to comment Share on other sites More sharing options...
Rob99 Posted April 25, 2023 Share Posted April 25, 2023 (edited) I'm just at the stage of working out what I want and system configuration........... https://forum.buildhub.org.uk/topic/32871-planning-a-solar-pv-and-battery-system/ Edited April 25, 2023 by Rob99 Link to comment Share on other sites More sharing options...
Confused456 Posted May 16, 2023 Share Posted May 16, 2023 Hi @bullishbroker24 We have also received a request from SSE to complete the same form following our fast track G99 application and wondered how you got on. Link to comment Share on other sites More sharing options...
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