GridCapacityAPI.com

Substation · 6.6 kV · primary

Guildford 6.6kV

UK Power Networks · United Kingdom

Latest published values

6 served · 0 withheld

Each row is what the operator’s latest published dataset reports for one combination of direction, technology, measure, firmness and horizon. Hosting-capacity figures are indicative and reflect what operators publish. They are not a connection offer; only the operator can confirm capacity for a specific request.

Latest published capacity values, one row per series
Direction	Technology	Measure	Value	Firmness	Horizon	Source date
Injection	Generation (any)	Available	2.5 MVA	Firm	Now (snapshot)	1 Mar 2025
Injection	Generation (any)	Available	10.7 MVA	Unknown	Now (snapshot)variant: reverse_power_flow	1 Mar 2025
Injection	Generation (any)	Total	3.6 MVA	Firm	Now (snapshot)	1 Mar 2025
Injection	Generation (any)	Total	10.7 MVA	Firm	Now (snapshot)variant: reverse_power_flow	1 Mar 2025
Offtake	Load (any)	Available	2.8 MVA	Firm	Now (snapshot)	1 Mar 2025
Offtake	Load (any)	Total	10.7 MVA	Firm	Now (snapshot)	1 Mar 2025

UK Power Networks, Long Term Development Statement (LTDS) Capacity Heatmap, https://ukpowernetworks.opendatasoft.com/explore/dataset/ukpn-capacity-heatmap/ (last updated 2025-03-01)

What each value means

Methodology, both clocks, provenance and rights

Injection · Generation (any) · Available

2.5 MVA

Published in MVA; no MW figure is derived from it.

Granted

The operator's latest published dataset reports 2.5 MVA under methodology gb_ukpn_ltds_heatmap_2026.

Firmness: Firm
Horizon: Now (snapshot)
Methodology: gb_ukpn_ltds_heatmap_2026UKPN LTDS Capacity Heatmap: headroom from the Network Scenario Headroom Reportbasis operator calculated · network state n minus 1 · comparability class gb_ukpn_ltds_heatmapNot additive across assets. The method accounts for reserved: not stated · allocated: not stated · pre-reserved: not stated · pending requests: not stated
Operator’s date: 1 Mar 2025
Retrieved / confirmed: 2026-09-26 02:47 UTClast confirmed unchanged 2026-09-26 02:47 UTC
Source health: Healthy
Provenance: gb_ukpn_ltds_heatmaprecord 1ba2b635-c14e-5f12-930d-2cd028eb36af · payload sha256 26b34362e3c1…Operator’s publication (opens the operator’s site)
Licence: CC BY 4.0Attribution: UK Power Networks, Long Term Development Statement (LTDS) Capacity Heatmap, https://ukpowernetworks.opendatasoft.com/explore/dataset/ukpn-capacity-heatmap/ (last updated 2025-03-01)
Decision context: Not binding · indicative · a formal connection study is required
Operator note: limiting factor: Thermal
Operator note: rag: GREEN
Operator note: rag colour: green
Operator note: source field: generationAvailableCapacity

Injection · Generation (any) · Available

10.7 MVA

Published in MVA; no MW figure is derived from it.

Granted

The operator's latest published dataset reports 10.7 MVA under methodology gb_ukpn_ltds_heatmap_2026.

Firmness: Unknown
Horizon: Now (snapshot) · variant: reverse_power_flow
Methodology: gb_ukpn_ltds_heatmap_2026UKPN LTDS Capacity Heatmap: headroom from the Network Scenario Headroom Reportbasis operator calculated · network state n minus 1 · comparability class gb_ukpn_ltds_heatmapNot additive across assets. The method accounts for reserved: not stated · allocated: not stated · pre-reserved: not stated · pending requests: not stated
Operator’s date: 1 Mar 2025
Retrieved / confirmed: 2026-09-26 02:47 UTClast confirmed unchanged 2026-09-26 02:47 UTC
Source health: Healthy
Provenance: gb_ukpn_ltds_heatmaprecord 1ba2b635-c14e-5f12-930d-2cd028eb36af · payload sha256 26b34362e3c1…Operator’s publication (opens the operator’s site)
Licence: CC BY 4.0Attribution: UK Power Networks, Long Term Development Statement (LTDS) Capacity Heatmap, https://ukpowernetworks.opendatasoft.com/explore/dataset/ukpn-capacity-heatmap/ (last updated 2025-03-01)
Decision context: Not binding · indicative · a formal connection study is required
Operator note: equals published total: reversePowerFlowTotalCapacity
Operator note: source field: reversePowerFlowAvailableCapacity

Injection · Generation (any) · Total

3.6 MVA

Published in MVA; no MW figure is derived from it.

Granted

The operator's latest published dataset reports 3.6 MVA under methodology gb_ukpn_ltds_heatmap_2026.

Firmness: Firm
Horizon: Now (snapshot)
Methodology: gb_ukpn_ltds_heatmap_2026UKPN LTDS Capacity Heatmap: headroom from the Network Scenario Headroom Reportbasis operator calculated · network state n minus 1 · comparability class gb_ukpn_ltds_heatmapNot additive across assets. The method accounts for reserved: not stated · allocated: not stated · pre-reserved: not stated · pending requests: not stated
Operator’s date: 1 Mar 2025
Retrieved / confirmed: 2026-09-26 02:47 UTClast confirmed unchanged 2026-09-26 02:47 UTC
Source health: Healthy
Provenance: gb_ukpn_ltds_heatmaprecord 1ba2b635-c14e-5f12-930d-2cd028eb36af · payload sha256 26b34362e3c1…Operator’s publication (opens the operator’s site)
Licence: CC BY 4.0Attribution: UK Power Networks, Long Term Development Statement (LTDS) Capacity Heatmap, https://ukpowernetworks.opendatasoft.com/explore/dataset/ukpn-capacity-heatmap/ (last updated 2025-03-01)
Decision context: Not binding · indicative · a formal connection study is required
Operator note: source field: generationFirmCapacity

Injection · Generation (any) · Total

10.7 MVA

Published in MVA; no MW figure is derived from it.

Granted

The operator's latest published dataset reports 10.7 MVA under methodology gb_ukpn_ltds_heatmap_2026.

Firmness: Firm
Horizon: Now (snapshot) · variant: reverse_power_flow
Methodology: gb_ukpn_ltds_heatmap_2026UKPN LTDS Capacity Heatmap: headroom from the Network Scenario Headroom Reportbasis operator calculated · network state n minus 1 · comparability class gb_ukpn_ltds_heatmapNot additive across assets. The method accounts for reserved: not stated · allocated: not stated · pre-reserved: not stated · pending requests: not stated
Operator’s date: 1 Mar 2025
Retrieved / confirmed: 2026-09-26 02:47 UTClast confirmed unchanged 2026-09-26 02:47 UTC
Source health: Healthy
Provenance: gb_ukpn_ltds_heatmaprecord 1ba2b635-c14e-5f12-930d-2cd028eb36af · payload sha256 26b34362e3c1…Operator’s publication (opens the operator’s site)
Licence: CC BY 4.0Attribution: UK Power Networks, Long Term Development Statement (LTDS) Capacity Heatmap, https://ukpowernetworks.opendatasoft.com/explore/dataset/ukpn-capacity-heatmap/ (last updated 2025-03-01)
Decision context: Not binding · indicative · a formal connection study is required
Operator note: source field: reversePowerFlowTotalCapacity

Offtake · Load (any) · Available

2.8 MVA

Published in MVA; no MW figure is derived from it.

Granted

The operator's latest published dataset reports 2.8 MVA under methodology gb_ukpn_ltds_heatmap_2026.

Firmness: Firm
Horizon: Now (snapshot)
Methodology: gb_ukpn_ltds_heatmap_2026UKPN LTDS Capacity Heatmap: headroom from the Network Scenario Headroom Reportbasis operator calculated · network state n minus 1 · comparability class gb_ukpn_ltds_heatmapNot additive across assets. The method accounts for reserved: not stated · allocated: not stated · pre-reserved: not stated · pending requests: not stated
Operator’s date: 1 Mar 2025
Retrieved / confirmed: 2026-09-26 02:47 UTClast confirmed unchanged 2026-09-26 02:47 UTC
Source health: Healthy
Provenance: gb_ukpn_ltds_heatmaprecord 1ba2b635-c14e-5f12-930d-2cd028eb36af · payload sha256 26b34362e3c1…Operator’s publication (opens the operator’s site)
Licence: CC BY 4.0Attribution: UK Power Networks, Long Term Development Statement (LTDS) Capacity Heatmap, https://ukpowernetworks.opendatasoft.com/explore/dataset/ukpn-capacity-heatmap/ (last updated 2025-03-01)
Decision context: Not binding · indicative · a formal connection study is required
Operator note: limiting factor: Thermal
Operator note: rag: GREEN
Operator note: rag colour: green
Operator note: source field: demandAvailableCapacity

Offtake · Load (any) · Total

10.7 MVA

Published in MVA; no MW figure is derived from it.

Granted

The operator's latest published dataset reports 10.7 MVA under methodology gb_ukpn_ltds_heatmap_2026.

Firmness: Firm
Horizon: Now (snapshot)
Methodology: gb_ukpn_ltds_heatmap_2026UKPN LTDS Capacity Heatmap: headroom from the Network Scenario Headroom Reportbasis operator calculated · network state n minus 1 · comparability class gb_ukpn_ltds_heatmapNot additive across assets. The method accounts for reserved: not stated · allocated: not stated · pre-reserved: not stated · pending requests: not stated
Operator’s date: 1 Mar 2025
Retrieved / confirmed: 2026-09-26 02:47 UTClast confirmed unchanged 2026-09-26 02:47 UTC
Source health: Healthy
Provenance: gb_ukpn_ltds_heatmaprecord 1ba2b635-c14e-5f12-930d-2cd028eb36af · payload sha256 26b34362e3c1…Operator’s publication (opens the operator’s site)
Licence: CC BY 4.0Attribution: UK Power Networks, Long Term Development Statement (LTDS) Capacity Heatmap, https://ukpowernetworks.opendatasoft.com/explore/dataset/ukpn-capacity-heatmap/ (last updated 2025-03-01)
Decision context: Not binding · indicative · a formal connection study is required
Operator note: source field: demandFirmCapacity

History

Served series only

Offtake · Load (any) · Available

current 2.8 MVA

26 Sep 2026range 2.8–2.8 MVA26 Sep 2026

1 published value, as a table

Observed from	Until	Value
26 Sep 2026	current	2.8 MVA

Time axis: when we observed each value, not the operator’s effective date.

Injection · Generation (any) · Available

current 2.5 MVA

26 Sep 2026range 2.5–2.5 MVA26 Sep 2026

1 published value, as a table

Observed from	Until	Value
26 Sep 2026	current	2.5 MVA

Time axis: when we observed each value, not the operator’s effective date.

Injection · Generation (any) · Available

current 10.7 MVA

26 Sep 2026range 10.7–10.7 MVA26 Sep 2026

1 published value, as a table

Observed from	Until	Value
26 Sep 2026	current	10.7 MVA

Time axis: when we observed each value, not the operator’s effective date.

Offtake · Load (any) · Total

current 10.7 MVA

26 Sep 2026range 10.7–10.7 MVA26 Sep 2026

1 published value, as a table

Observed from	Until	Value
26 Sep 2026	current	10.7 MVA

Time axis: when we observed each value, not the operator’s effective date.

Injection · Generation (any) · Total

current 3.6 MVA

26 Sep 2026range 3.6–3.6 MVA26 Sep 2026

1 published value, as a table

Observed from	Until	Value
26 Sep 2026	current	3.6 MVA

Time axis: when we observed each value, not the operator’s effective date.

Injection · Generation (any) · Total

current 10.7 MVA

26 Sep 2026range 10.7–10.7 MVA26 Sep 2026

1 published value, as a table

Observed from	Until	Value
26 Sep 2026	current	10.7 MVA

Time axis: when we observed each value, not the operator’s effective date.

Through the API

$ curl "https://api.gridcapacityapi.com/v1/substations/sub_06gdq75qqsvrf5g7pe8631epf8/capacity" \  -H "Authorization: Bearer gc_live_..."

Guildford 6.6kV substation: grid capacity (UK Power Networks) · GridCapacity API