Project types

Embedded network and private wire modelling

Embedded networks and private wire developments are private electricity networks that integrate embedded generation and storage, connect to the wider public distribution network and often sell electricity to multiple customers. Gridcog models the whole network, from shared solar and batteries to each customer's tariff, and shows the cashflows for every party.

  • EnergyTec, an embedded network service provider in Western Australia, handles meter reading and billing for almost 2,000 properties a month. Its team has used Gridcog to model two of the biggest property portfolios in the state.

  • At Mangawhai Hills in New Zealand, about 700 homes will share a private network with a single connection to Northpower. Revolve used Gridcog to show that stacking the value of the homes' batteries reduces the grid connection the development needs.

  • At a retail outlet in southern England where the landlord controls the energy supply, Carb0n modelled 3.5 MW of solar car ports with a 4 MWh battery in Gridcog.

What is an embedded network?

An embedded network is a private electricity network that connects to the public distribution network through one parent connection point, with each customer inside it metered separately at its own child connection point. Many integrate embedded generation and storage, such as shared solar and batteries, and the network's owner or operator often sells electricity to the customers inside it.

What is private wire?

Private wire is a direct connection between renewable generation and the loads it supplies, separate from the public network. It can be as short as a link between on-site solar and the buildings next to it. Or it can run for kilometres: a project team discussed at a Gridcog Unplugged event in London evaluated a private wire of about 24 km from a solar farm, to energise a data centre 12 months earlier than a grid connection would allow.

Embedded networkPrivate wire
Where the term is usedMainly AustraliaMainly Great Britain
What it isA private network behind one parent connection to the distribution network, with each customer metered at a child connection pointA direct connection between on-site or nearby generation and the loads it supplies
Typical sitesRetail, airports, university campuses, mixed-use residential, aged care, land lease communities and retirement villagesCampuses with their own high-voltage ring and retirement villages; data centre developers are also evaluating private wire
In GridcogOne site with a submeter, load and retail tariff for each customerOne site behind its connection, with the same submeter, tariff and participant set-up

How does Gridcog model an embedded network?

As one site behind its grid connection, with a submeter for each customer. Gridcog dispatches the network's shared generation and storage interval by interval against the connection's limits, prices and tariffs, then shows where the energy went and what each party pays and earns.

01

One connection, many customers

Model the parent connection with its import and export limits, then add a submeter for each customer or tenant, with its own load profile.

02

Customer tariffs

Give each submeter its own retail tariff, with flat, time-of-use or block rates, feed-in rates and future rate changes. Compare tariff configurations side by side in one project.

03

Network charges

Apply the distribution network's tariff at the parent connection, including demand charges, so you can see how shared solar and batteries change what the whole network pays.

04

Shared generation and storage

Add solar, batteries, EV chargers and generators to the network and co-optimise them against the connection, prices and every customer's load.

05

Energy flows inside and outside the network

Inter-asset flows show, interval by interval, how much solar went to the network's loads, the battery or the grid, and how much the loads drew from the grid. Each customer's own consumption and costs show through its submeter.

06

Every party's cashflows

Add the network owner, landlord, retailer, customers and any PPA provider as participants, then assign each tariff, cost and income to the right party, including percentage splits.

Modelled in Gridcog

How can batteries shrink an embedded network's grid connection?

By cutting the network's peak import, so it needs less grid capacity. For community energy projects such as the Mangawhai Hills development north of Auckland, Revolve uses Gridcog to compare a small grid connection with batteries and solar against a large grid connection with high capital costs and little battery capacity.

‘Unlike other tools, Gridcog lets us define scenarios and assign elements independently, then compare metrics for the developer, lines company, resident, and PPA provider.’ Josh Yeats, Community Energy Lead, Revolve

Mangawhai Hills

Homes
About 700, on a private network with a single connection to Northpower
Each home
About 10 kW of solar, a hybrid inverter and a battery
Solar in total
About 7 MW, generating roughly 105% of the community's annual consumption
Battery fleet
Designed for backup, arbitrage and peak shaving
Result
Stacking the batteries' value reduced the required grid connection size, lowering upfront capital costs and network operating costs

Planning an embedded network or private wire development?

Model your network in Gridcog

Who models embedded networks and private wire with Gridcog?

A technician in high-visibility clothing walking beside rooftop solar panels
Embedded network service provider, Western Australia

EnergyTec

Uses Gridcog to model renewables in its clients' embedded networks, see energy flows inside and outside each network, and compare tariff configurations side by side.

‘If X changes or Y changes, the outcome is right there in a simple-to-understand report.’
Rob Rye, Technical Services Operations Manager, EnergyTec
Office towers and older buildings in central London
Clean energy partner for real estate, UK

Carb0n

At a retail outlet where the landlord controls the energy supply, modelled 3.5 MW of solar car ports with a 4 MWh battery.

‘The centralised energy control allowed us to create value for the landlord that would not have been possible if individual tenants managed their own supply.’
Peter Massie, Head of UK, Carb0n
Aerial view of a town and farmland in the UK countryside
Net zero consultancy, UK

Net Zero Advisory

Works with a retirement village developer that had already invested in private wire infrastructure and submetering for residents, and used Gridcog to evaluate adding battery storage to its solar.

Who models embedded networks in Gridcog?

Embedded network operators, property owners and developers, retirement and land lease community operators, and the consultants who advise them.

Frequently asked questions

Both are private electricity networks. Embedded network is the usual term in Australia, for a network behind one parent connection to the distribution network with customers metered separately inside it. Private wire is the usual term in Great Britain, for a direct connection between generation and the loads it supplies. Gridcog models both the same way: one connection, the assets behind it and each customer's tariff.

Yes. Each customer sits behind its own submeter with its own retail tariff, so tenants, residents and businesses can be on different rates, including time-of-use and feed-in rates. EnergyTec uses Gridcog to compare multiple tariff configurations in a single project and see the effect of different network charges.

Through inter-asset flows. For every interval, Gridcog shows how much solar went to the network's loads, to the battery or to the grid, and how much the loads drew from the grid. The flows follow a set accounting order, because electrons can't be traced. Each customer's own consumption and costs show through its submeter.

An embedded network is defined by its connection: one parent connection to the distribution network, often with electricity sold to the customers inside it. A microgrid is operated as a single system, often with its own firm generation, and some can run islanded from the main grid. A site can be both. See microgrid modelling.

In Australia's National Electricity Market, customers inside an embedded network are either on-market or off-market. Where the state's rules allow it, on-market customers can take a retail offer in the same way as any other customer. Gridcog Chief Product Officer Pete Tickler notes that taking child meters on-market is one of the new routes to wholesale markets for behind-the-meter assets in Australia.

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Model your embedded network in Gridcog

Request a demo and we'll show you how Gridcog models the customers, tariffs and shared assets in your embedded network or private wire development.

The team behind Gridcog

Fabian Le Gay Brereton, Chief Executive Officer and Co-Founder of Gridcog

Fabian Le Gay Brereton

Chief Executive Officer & Co-Founder

Previously co-founded Greensense, acquired by ERM Power (now Shell Energy).

Pete Tickler, Chief Product Officer and Co-Founder of Gridcog

Pete Tickler

Chief Product Officer & Co-Founder

Co-founded Greensense and led digital innovation at ERM Power (now Shell Energy).

Genna Boyle, Chief Commercial Officer and Head of EMEA at Gridcog

Genna Boyle

Chief Commercial Officer & Head of EMEA

More than 10 years in energy strategy, trading and renewables, with senior roles at Battery Optimiser and Limejump.