Alternatives to Grid Connection: Energy Storage:

David SurplusChairman, B9 Energy Group

The Institute of Healthcare Engineering

and Estate Management

Lecale DSU Build-up

DDFFRE

11kV Network (3-phase)

Lecale DSU

33kV sub-station (Community Sub-station)

Farm scale ADICAES (N I Energy Storage Demonstration Park)

“Lecale” Aggregated DSU for

11kV circuits

• Aim to be self-sufficient in electricity• Aim to have cheaper, greener and more secure power supplies• More than 70 x rural 33kV sub-stations in NI

250kW wind turbinesSolar PVAnaerobic Digestion2nd life traction battery chargingAmmonia production300 houses + EVs as a captive customer base“Seagen” Tidal test site

NB: Ammonia can power...• Tractors• Fishing boats• Ferries• Standby gen-sets upsold as...• Peak lopping gen-sets

Compression is hot business

“Isothermal Compressed Air Energy Storage” Stores heat as well as compressed air

Power Unit• 500 kW modules• 70% round-trip efficiency• 20+ year lifetime• Selling price ≈ $1000 per

kW

First-Generation Product Shipping in Q1-2015 Breakthrough Price and Service Life

Storage Unit• 1 MWh modules• Proprietary filament-wound

tanks• Shipping container form factor• ASME certified• Selling price ≈ $200 per kWh

LightSail Energy Confidential

Small wind planning applications

Small wind planning applications

Offshore windfarm

Microgrid revenue streams...

• Arbitrage – Buy at £20 to £30 / MWhrSell at £80 to £250 / MWhr

• “Load on Demand” services to avoid external curtailment(30% of wind strike price?)

• Direct sales on long term fixed price (+RPI) basis• Consideration for avoided cost of grid upgrade• Ancillary services: Reactive power management

Voltage regulationPossible provision of inertia

• Capacity market payments

Other microgrid benefits...

• Additional microgrid revenues allow voluntary reduction of ROC revenues on single generator projects – easing price rise pressure

• Security of supply to load customers is improved • Autonomous operation possible - to ride through

central system blackouts if necessary

Internet

Wireless Connection

AC

DC

Ethernet

Home scale Microgrid

Industrial scale microgrid

Thank you