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Claim this listingOne Zero Energy Limited
4.6
114 Google reviews
1–2 days
Typical install time
£7,500
BUS grant amount
About One Zero Energy Limited
20 Central Avenue St. Andrews Business Park, C/O External Services Limited, NORWICH
Coverage area
Based in Norfolk, NR7 0HR
Areas served:
Reviews
4.6
114 Google reviews
Based on verified Google reviews
Sarah Walford
We chose Wise Green Energy to fit our solar panels and battery following a friend’s recommendation and we haven’t been disappointed. All of the team arrived promptly at the scheduled times and were very professional, clearly taking pride in their work. I would be happy to recommend them to others.
Nick Norman
This was an upgrade to a previously installed system (by WiseGreen), extra panels & battery added to existing hybrid inverter system. All good! Contractors used were all friendly, on time, polite & helpful. Staff from WiseGreen also helpful & polite and on time. No problems
Richard Hanny
Wisegreen has been an excellent company to deal with, timely and efficient. Everyone involved from the office, the assessor to the installers have all been really pleasant and helpful. We now have 12 solar panels producing electricity even during the short winter days.
holly penfold
We had our solar panels fitted this week. Firstly the process went smoothly, everything was planned by the company and there was no stress on our behalf. The scaffolding company were professional, made sure the scaffolding was up before the solar panel installation date. The solar panels were delivered and secured safely without any damage to the property. Then the solar panels were installed, again the men doing this were very professional and helpful. The panels look great, I’m really happy with how they look. Lastly, the electricians did a great job, and made sure the battery was put in a suitable place. In all a great experience, and when needed the electricians have kept in contact for help!
Bawden Burrows
Wise Green Energy recently fitted PV panels and battery storage to our property, and I have been very impressed from start to finish. The whole installation would have been completed in under 3 days, albeit for a change of supplier equipment which meant a part was missing but this was sourced and carried out the next working day. All the guys, including the scaffolders were brilliant, friendly and courteous. The system is up and running and even given we are in the depths of winter currently saving about a third on energy costs, but this will be more once I change to a more suitable tariff. All in all, highly recommend, great bunch of people.
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Frequently asked questions
How do I know you’re properly qualified and certified to install heat pumps?
We are MCS‑certified and registered with an approved consumer protection/competent person scheme, which is essential for quality assurance and to access grants like the Boiler Upgrade Scheme (BUS).
Can you tell me if a heat pump is actually suitable for my home?
We carry out a detailed home assessment, including property type, insulation levels, existing heating system and available outdoor space, to confirm whether a heat pump is a good fit.
What type and size of heat pump will you recommend for my property, and why?
We design the system using a heat‑loss calculation for your home, then match the correct kW size and model (for example, air‑source vs ground‑source) so it runs efficiently and reliably.
What will the full installation cost be, and what’s included in your quote?
Our fixed quote clearly lists the heat pump, cylinder, controls, labour, scaffolding (if needed), electrical work and any radiator or pipework upgrades, so you know exactly what you’re paying for.
Can you help me access government grants like the Boiler Upgrade Scheme?
Yes, as an MCS installer we can confirm your eligibility, apply for the BUS grant (worth up to £7,500) on your behalf and deduct it directly from your quote.
How much disruption should I expect during installation, and how long does it take?
A typical air‑source heat pump installation takes around 2–5 days, and we’ll agree locations for the indoor and outdoor units, manage any planning considerations and keep you informed each day.
Will I need to replace my radiators or upgrade anything else in my home?
After the heat‑loss survey, we’ll advise if any radiators, pipework, electrics or hot‑water cylinder need upgrading so the system can run efficiently at lower flow temperatures.
How noisy is the outdoor unit and where will it be installed?
Modern heat pumps are designed to be quiet and must meet UK noise regulations; we’ll position the unit to minimise any impact on you and your neighbours and comply with local planning rules.
What warranties, servicing and aftercare do you provide?
You’ll get manufacturer warranties on the heat pump plus our workmanship guarantee, and we offer ongoing servicing and support to keep your system performing at its best.
What running costs and savings can I realistically expect compared to my current boiler?
We’ll estimate your likely annual running costs and potential savings based on your current fuel type, insulation level and tariffs, using real‑world performance data rather than lab figures.
Boiler Upgrade Scheme
Up to £7,500
off your heat pump installation
This installer handles the full BUS grant application — deducted directly from your quote. No upfront payment needed for the grant amount.
Scheme open until 2028 — limited funding available
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