Case studies
Named North East installs — real KPIs, real properties
8 recent residential and commercial installs across 8 North East towns. Each case study includes the actual system specification, headline result, customer first name (anonymised surname) and supplementary KPIs.
Harraton, Washington — 4.2 kWp solar + 5 kWh battery on 1970s semi
A south-east-facing 1970s semi in Harraton, Washington. The owner had been monitoring electricity prices for 18 months and wanted both bill reduction and partial energy independence. We sized a 10-panel 4.2 kWp system with a 5 kWh battery to maximise self-consumption.
Result
64% lower electricity bills
Gateshead — Vaillant aroTHERM plus heat pump on Victorian terrace
A Heat Geek-designed Vaillant aroTHERM plus retrofit on a Gateshead Victorian end-of-terrace. The owners were replacing an aging combi boiler and wanted to claim the £7,500 BUS grant. Room-by-room heat loss survey identified 4 radiator upgrades needed; living room and main bedroom radiators kept original.
Result
£7,500 BUS grant + projected 38% lower heating cost
Sunderland — Tesla Powerwall 3 + Zappi EV charger on 4-bed detached
A Tesla Powerwall 3 + Zappi v2 charger retrofit onto a 2008-build Sunderland detached. The owner already had 4 kWp solar from 2022 but wanted battery storage to capture more daytime export and EV smart-charging to maximise the Octopus Intelligent Go tariff.
Result
92% self-consumption + 7p/kWh EV fuel cost
Durham City — 24 kW Mitsubishi Ecodan for veterinary practice
A 24 kW Mitsubishi Ecodan air source heat pump install for a Durham City veterinary practice, replacing a failed 1990s oil-fired boiler. Phased over the practice's closed Sundays to minimise clinical disruption. Capital allowance + ECA brought net cost to £37,000.
Result
£18,400/yr fuel cost saving vs old oil boiler
South Shields — Mitsubishi MSZ-AP multi-split AC on coastal flat
A Mitsubishi MSZ-AP 2-zone multi-split AC system on a top-floor South Shields flat. The owner had no central heating (electric panel only) and wanted summer cooling for the east-facing sea view + supplementary winter heating for shoulder months.
Result
Replaced £1,400/yr electric heating with £380/yr AC heating
Cramlington — 48 kWp solar PV array for primary school
A 48 kWp commercial solar PV array installed at a Cramlington primary school. PSDS Round 4 funded 60% of capital. Annual generation 42,000 kWh — covering 36% of school electricity demand. Phased over Easter holidays to avoid term-time disruption.
Result
£8,400/yr electricity bill saving + 8 tonnes CO₂
Consett & Stanley — 3-charger fleet EV install for plumbing merchant
3× Ohme 22 kW three-phase EV chargers installed at a plumbing merchant's Consett yard. Northern Powergrid three-phase supply upgrade negotiated; OZEV Workplace Charging Scheme funded £1,050 (3× £350 per socket). Fleet of 6 Ford Transits transitioning to EV over 2 years.
Result
£4,800/yr fleet fuel cost saved per EV
Morpeth — hybrid heat pump on Grade II listed coaching inn
A Vaillant aroTHERM hybrid heat pump + ecoTEC boiler retrofit on a Grade II listed Morpeth coaching inn. Heat pump runs primary, boiler kicks in below 0°C. eBUS native cascade. Preserved original radiators and pipework — minimal heritage impact.
Result
32% lower heating cost without compromising heritage
Our accreditations
Accredited, certified, and backed by independent standards
NICEIC Approved
D124458
Electrical contractor
Gas Safe Register
947841
Gas appliances
Heat Geek Trained
Heat pump design specialists
TrustMark
Government endorsed
Quality scheme
SafeContractor
Approved
H&S accredited
ISO 9001
2015
Quality management
ISO 14001
2015
Environmental management
ISO 45001
2018
OH&S management
PAS 2030
:2019
Retrofit standard
NAPIT
Member
Electrical inspection
F-Gas Certified
Air conditioning refrigerant
NICEIC Approved
D124458
Electrical contractor
Gas Safe Register
947841
Gas appliances
Heat Geek Trained
Heat pump design specialists
TrustMark
Government endorsed
Quality scheme
SafeContractor
Approved
H&S accredited
ISO 9001
2015
Quality management
ISO 14001
2015
Environmental management
ISO 45001
2018
OH&S management
PAS 2030
:2019
Retrofit standard
NAPIT
Member
Electrical inspection
F-Gas Certified
Air conditioning refrigerant
Every accreditation listed is independently verified. We carry the registration numbers — ask for any on request.
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We document selected installs with the customer's permission — your project could be next.