QueueWatchby QueueQuant Price my project Get the plan that holds up best for your site, and where that answer flips.
Distribution / SPEN / Site

Maentwrog

At Trawsfynydd

SPEN Embedded Capacity Register >1MW, September 2026 edition

Site, company and substation names are shown as they appear in the registers, including capitalisation.

Date connected
Not stated
Status
Connected
Customer
Not stated
Site name
Maentwrog
Address
Maentwrog, Blaenau Ffestiniog, North Wales, LL41 4HY
Grid reference
Easting 265422, northing 339455
Licence area
Merseyside, Cheshire and North Wales (SPM)
Grid supply point
Trawsfynydd
Bulk supply point
FOUR CROSSES GT2 / MAENTWROG GT1 / MAENTWROG GT2
Primary substation
Not stated
Connection voltage
33 kV
Technology group
Storage
Energy source 1
Stored Energy, Storage - Mechanical - Pumped Hydro: 29.6 MW registered
Registered capacity
29.6 MW
Maximum export capacity
29.6 MW
Maximum import capacity
0 MW
Flexible connection
Not stated
In a connection queue
No
Date accepted
27 Jun 2019
Target energisation date
Not stated
Distribution reinforcement reference
Not published by SPEN
Transmission reinforcement reference
Not stated
Export MPAN
Not stated
Import MPAN
Not stated
Last updated
14 Sep 2020
Tracked since
March 2026 edition

Change history

Tracked since the March 2026 edition, across 7 editions.

Changes to its status, capacity, technology or customer, newest first.

No change to its status, capacity, technology or customer.

Also at Trawsfynydd

GSP view

18 other sites at this grid supply point in the September 2026 edition. In all, the sites here total 144 MW: 93 MW connected, 51 MW accepted to connect.

  • Bron Miod SolarIngenstat Renewables Limited, SolarAccepted25 MW
  • Pen-Y-GroesArc-Tech Mu Ltd, WindAccepted15.96 MW
  • Cemmaes CWestbury Windfarms, WindConnected12.5 MW
  • Cwm DyliRWE, StorageConnected10.2 MW
  • Nefyn Solar FarmLightsource Asset Management Limited, SolarConnected8 MW
  • Llwyndyrus FarmLuminous Energy, Solar, FOUR CROSSES T1 primaryConnected5 MW
  • Lon PinSolar West Solar Parks, Solar, LLANBEDROG T1 primaryAccepted5 MW
  • Cemmaes BVestas, WindConnected4.878 MW

See all 18

QueueQuant

Price what a delay would do to your project

QueueWatch reports what changed in the DNOs' published connection registers. It doesn't tell you what to do about it. That's what QueueQuant is for.

Give QueueQuant a site and it compares every way you could power it, on the grid or off it: waiting for the firm date, taking a non-firm offer, building a private wire or going off-grid, across every combination of contracted capacity, generation and battery. That’s millions of possible plans, each tested against thousands of possible futures for delay, curtailment and price. It returns the one plan that holds up best, even when that plan is not to build.

Price my project

Get the plan that holds up best for your site, and where that answer flips.

What you get from QueueQuant

  • The route to power that wins
  • How to size every asset on the site
  • The level of delay or curtailment at which that answer flips
  • Whether the project is worth building at all
  • How bad the worst outcomes get, at the risk level you choose