GridCapacityAPI.com

Substation · 33 kV · primary

Southend Grid 33kV

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	38.1 MVA	Firm	Now (snapshot)	1 Mar 2025
Injection	Generation (any)	Available	36 MVA	Unknown	Now (snapshot)variant: reverse_power_flow	1 Mar 2025
Injection	Generation (any)	Total	55.3 MVA	Firm	Now (snapshot)	1 Mar 2025
Injection	Generation (any)	Total	36 MVA	Firm	Now (snapshot)variant: reverse_power_flow	1 Mar 2025
Offtake	Load (any)	Available	32.2 MVA	Firm	Now (snapshot)	1 Mar 2025
Offtake	Load (any)	Total	72 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

38.1 MVA

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

Granted

The operator's latest published dataset reports 38.1 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 bde3ec89-a421-5dc6-a163-a9efdc12c571 · payload sha256 57e399c1d9e1…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

36 MVA

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

Granted

The operator's latest published dataset reports 36 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 bde3ec89-a421-5dc6-a163-a9efdc12c571 · payload sha256 57e399c1d9e1…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

55.3 MVA

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

Granted

The operator's latest published dataset reports 55.3 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 bde3ec89-a421-5dc6-a163-a9efdc12c571 · payload sha256 57e399c1d9e1…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

36 MVA

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

Granted

The operator's latest published dataset reports 36 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 bde3ec89-a421-5dc6-a163-a9efdc12c571 · payload sha256 57e399c1d9e1…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

32.2 MVA

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

Granted

The operator's latest published dataset reports 32.2 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 bde3ec89-a421-5dc6-a163-a9efdc12c571 · payload sha256 57e399c1d9e1…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

72 MVA

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

Granted

The operator's latest published dataset reports 72 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 bde3ec89-a421-5dc6-a163-a9efdc12c571 · payload sha256 57e399c1d9e1…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 32.2 MVA

26 Sep 2026range 32.2–32.2 MVA26 Sep 2026

1 published value, as a table

Observed from	Until	Value
26 Sep 2026	current	32.2 MVA

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

Injection · Generation (any) · Available

current 38.1 MVA

26 Sep 2026range 38.1–38.1 MVA26 Sep 2026

1 published value, as a table

Observed from	Until	Value
26 Sep 2026	current	38.1 MVA

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

Injection · Generation (any) · Available

current 36 MVA

26 Sep 2026range 36–36 MVA26 Sep 2026

1 published value, as a table

Observed from	Until	Value
26 Sep 2026	current	36 MVA

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

Offtake · Load (any) · Total

current 72 MVA

26 Sep 2026range 72–72 MVA26 Sep 2026

1 published value, as a table

Observed from	Until	Value
26 Sep 2026	current	72 MVA

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

Injection · Generation (any) · Total

current 55.3 MVA

26 Sep 2026range 55.3–55.3 MVA26 Sep 2026

1 published value, as a table

Observed from	Until	Value
26 Sep 2026	current	55.3 MVA

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

Injection · Generation (any) · Total

current 36 MVA

26 Sep 2026range 36–36 MVA26 Sep 2026

1 published value, as a table

Observed from	Until	Value
26 Sep 2026	current	36 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_06gdq75qqntah1g4cfy671rmtc/capacity" \  -H "Authorization: Bearer gc_live_..."

Southend Grid 33kV substation: grid capacity (UK Power Networks) · GridCapacity API