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Community Microgrids
HH Heat = x6 max electric demand
230,000 low voltage substations
OpenLV or Microgrid SO230,000 distribution substations
Distribution System Operator14 license areas (380 GSPs)
1 National System Operator(+4 EU Interconnectors)
Introduction to Microgrids
Housebuilders reserve a small area of each development for the construction of community
battery infrastructure.
Here we see the CEPRO developed, Bristol Energy Cooperative community battery and remote
metering monitoring equipment used for operations & maintenance
DESIGNDESIGN
FEASIBILITY
Feasibility Study - Hazelmead, Bridport
Electric Hot Water
Power & Lights
Solar Generation
Air Sourced Hot Water
All Electric Imports
Exports
‘Direct match’
Air Sourced Hot Water
All Electric Imports
Exports
Hot Water Storage
Hot Water Storage
‘Direct match’
Air Sourced Hot Water
All Electric Imports
Exports
Hot Water Storage
Hot Water Storage
‘Direct match’
Direct & Microgrid ‘match’
Microgrid ‘match’
Air Sourced Hot Water
All Electric Imports
Hot Water Storage
Battery Storage &
Hot Water Storage
‘Direct match’
Direct & Microgrid ‘match’
Microgrid ‘match’
Battery Storage
Direct & Microgrid ‘match’
Annual benefits (210 kWp) - Resident ownership
- Public grid
Annual benefits (210 kWp) - CESCo ownership
- Community microgrid
Hazelmead Community ESCo captures extra £12k benefits:
profits are distributed to investors & residents
Switching to Heat Pumps reduces electricity Imports BUT also reduces PV self-use
Sw
itchi
ng to
a M
icro
grid
with
a C
omm
unity
Bat
tery
re
duce
s el
ectri
city
Impo
rts A
ND
incr
ease
s P
V
self-
use
Public Grid
Microgrid + Battery
A business case assessment has been provided to Bridport Community Land Trust.
This recommends that the two best options are:
#4. Self funding with 130kWp PV and private air-source heat pumps#14. Foundry funds 210kWp PV and a 340kWh community battery
The Foundry funded option (#14) is neutral for residents while providing an average 7.5% return to CESCo investors over 25 years and reducing carbon emissions from 12 tonnes per year to -10 tonnes per year.
The Foundry funded option (#14) is sensitive to kWh/kWp (solar insolation) but otherwise relatively insensitive to other variables
The ‘Microgrid Foundry’ model
Secure new schemes, form Community ESCOs, procure
microgrids from housebuilders
Customers/Members
Billing and O+M
Supply & Purchase
Agreements
Investors
Wholly owned subsidiaries during construction and first
years of operation
Own and FundIndependent funding
and financial management
Financial regulatory compliance, admin,
share register, dividend repayments, etc
Members BUY energy via a Power Supply Agreement
with the CESCo
Members SELL solar energy via a Power
Purchase Agreement with the CESCo
Framework Project Development Agreement
Year 0
Design & Construction
CEPRO and the Microgrid Foundry secure sites then fund and support
construction of the community energy system
Incubation
The Microgrid Foundry operates and optimises the assets and benchmarks the profitability
Year 1-2
Community Refinance
Local community benefit societies (BenComs) supports the
community to bring the assets into local ownership
Year 2-3
Community Operation
Each community operates their local energy assets for the
financial benefit of their local user members
Year 3+
The Foundry de-risks early stage microgrid projects through a portfolio approach
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