PV
Solar panels
- Designed to your roof's direction and shading
- Optimisers where part of the roof is shaded
- Pitched and flat roofs
- Network operator applications handled
Solar · Battery · Heat pumps · Ventilation
Lower bills from your own roof
Volt Energy Southern designs and installs solar PV, battery storage and air source heat pumps for homeowners, businesses and housing providers across the south of England. One team from survey to handover.
- Free survey
- Our own install team
- DNO paperwork handled
Accredited & certified installer
Our services
Everything that makes a home cheaper to run
We design each system around the roof, the meter and how the property is used, then install, commission and register it. You deal with one company the whole way through.
BESS
Battery storage
- Use daytime solar in the evening
- Charge on cheap overnight tariffs
- Added to new or existing solar
- App set-up and tariff advice
ASHP
Air source heat pumps
- Room-by-room heat loss surveys
- Replace gas, oil, LPG or storage heaters
- Cylinders, controls and radiator upgrades
- Full commissioning and handover
VENT
Ventilation
- Continuous extract fans (dMEV)
- Positive input ventilation (PIV)
- Tackles condensation and mould
- Fitted to retrofit standards
DHW
Solar hot water diverters
- Heat water with surplus solar
- Less cheap export to the grid
- Relay control for timed boosts
ELEC
Electrical works
- Consumer unit upgrades
- Cable runs and earthing
- Testing and certificates
Free quote
Request a callback
Tell us a little about your property and we'll call you back to arrange a free survey. Photos of your roof, meter or current boiler help us quote faster.
- No-obligation survey
- Fixed written quote
- Housing providers and contractors welcome
Heat pump examples
Air source heat pumps we fit
Every heat pump starts with a room-by-room heat loss calculation. We size the unit, cylinder and radiators from that, so the house stays warm at low flow temperatures.
Retrofit install · Buckinghamshire
LPG boiler replaced with a 5 kW heat pump
- Before
- LPG boiler fed from bottled gas
- Heat pump
- Ideal Logic Air 5 kW
- Controls
- Ideal Halo heating controls
- Hot water
- 120–150 litre unvented cylinder
- Also fitted
- Solar PV and ventilation as part of a whole-house retrofit
Typical packages
Sized to the home
| Output | Typical home | Radiators |
|---|---|---|
| 3–5 kW | Flat or small terrace | Around 5 new |
| 5–8 kW | 2–3 bed house | Around 8 new |
| 8–10 kW | Larger 3–4 bed house | Around 10 new |
Each package includes the heat pump, controls and an unvented cylinder from 120 to 300 litres. We keep existing pipework where it's suitable, or run new pipework where it isn't.
How it works
From first visit to switch-on
Most domestic installs take one to three days on site. We handle the paperwork with the network operator for you.
Survey
We visit, measure the roof, check the meter and consumer unit, and look at how you use energy.
Design
You get a system design with panel layout, expected yearly generation and a fixed price.
Install
Scaffold, mounting, panels, inverter and battery, fitted by our own installation team.
Handover
We commission and test the system, register it, and show you how to read the app.
Why choose Volt
What you get with us
We're a southern installer working across homes, businesses and social housing. Here's how we work on every job.
One company, start to finish
Survey, design, install and handover by the same team.
Designs you can see
3D roof models with shade analysis before anything is fitted.
Fixed written quotes
The price you agree is the price you pay.
Paperwork handled
Network operator applications and system registration done for you.
Whole-house thinking
Solar, battery, heat pump and ventilation designed to work together.
Used to occupied homes
Experienced on live retrofit programmes with tenants in place.
Clear handover
We show you the app and leave the certificates and manuals.
Fully accredited
MCS, TrustMark, NAPIT, HIES, Gas Safe and PAS 2030.
Housing providers & contractors
A delivery partner for retrofit programmes
We work with housing associations and main contractors on whole-house retrofit across occupied homes. That means multiple measures per property, tenant liaison and documentation for every address.
- Pre-installation surveys and design for PV, ASHP and ventilation
- Per-property cost cards and monthly applications
- Photo evidence and handover packs for each address
- Programme tracking so every job's status is visible
Typical measure package
- Solar
- PV array sized to the roof, with optimisers where shading needs them
- Storage
- Battery added where the tenant's usage benefits
- Heating
- Air source heat pump with cylinder and emitter upgrades
- Ventilation
- Extract or PIV to suit the improved fabric
- Extras
- Diverters, enabling works and remedials, priced on the card