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
MCS Certified
NAPM47760
Heat pumps & solar
NICEIC Approved
D124458
Electrical contractor
Gas Safe Register
947841
Gas appliances
Heat Geek Trained
Heat pump design specialists
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
Tesla Certified Installer
Powerwall battery storage
Sigenergy Approved Installer
SigenStor battery storage
Fox ESS Approved Installer
EVO & Cube battery storage
MCS Certified
NAPM47760
Heat pumps & solar
NICEIC Approved
D124458
Electrical contractor
Gas Safe Register
947841
Gas appliances
Heat Geek Trained
Heat pump design specialists
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
Tesla Certified Installer
Powerwall battery storage
Sigenergy Approved Installer
SigenStor battery storage
Fox ESS Approved Installer
EVO & Cube battery storage
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.