Most guides talk about solar, batteries and heat pumps as separate subjects. But for eligible households, the Warm Homes Local Grant can fund all three in a single package — the most complete energy transformation currently available to UK homeowners.
See our hub guide on the Warm Homes Plan for the broader scheme.
Can you combine solar, battery and heat pump under the WHP?
Yes. The Warm Homes Local Grant lists solar PV, battery storage and air source heat pumps as eligible measures. A survey may recommend all three if your home benefits from each. Total grant value can reach £30,000 — enough to cover all three measures and insulation upgrades in many properties.
Alliant Energy installs all three measures. We're MCS-certified for each, so we deliver the complete funded package without subcontracting.
Why the combination is more powerful than any single measure
| Measure | What it does | Why it works better with the others |
|---|---|---|
| Solar PV | Generates electricity from sunlight | Charges the battery and powers the heat pump |
| Battery storage | Stores surplus solar electricity | Saves solar surplus for evening heat pump use |
| Air source heat pump | Heats home and hot water electrically | Run on your own solar generation: near-zero heating cost |
A heat pump run entirely on self-generated solar costs next to nothing to operate. A battery ensures the surplus isn't wasted on grid export at low SEG rates. Together, the three measures can reduce a household's grid demand to near zero on a summer day.
What a complete funded package looks like
A typical Alliant Energy Warm Homes Plan installation for a three-bedroom semi in Lancashire might include:
- 8 × DMEGC 465W TOPCon solar panels (3.72kWp) — south-facing roof
- Fox ESS hybrid inverter (3.7kW, 10-year warranty)
- Levelise Hub smart battery management with 5.76kWh battery
- Air source heat pump (8kW, sized to heat loss assessment)
- Heating controls and smart thermostat
- Solid or cavity wall insulation where appropriate
Every element is MCS-certified and covered by manufacturer warranties. All work is funded by the WH:LG — no upfront cost, no repayment.
Want the complete package?
Call Alliant on 0800 088 4286 to check eligibility and book your free survey.
How to apply for the combined package
- Contact Alliant Energy and confirm your eligibility (income ≤£36,000, EPC D–G)
- We refer your application to Cosy Homes in Lancashire
- A free survey is arranged — our assessors survey for all three measure types simultaneously
- Cosy Homes issues a funding confirmation covering all recommended measures
- Alliant Energy installs the complete package
- You receive MCS certificates for all installed systems
What if I don't qualify for the grant?
Alliant offers private solar and battery packages starting at £5,999 (6 panels + 5.76kWh battery, 0% VAT). Heat pumps are available separately with the £7,500 Boiler Upgrade Scheme grant — rising to £9,000 for oil/LPG homes from July 2026 — open to any homeowner. Even privately funded, the combination creates a genuinely low-cost, low-carbon home.
Frequently asked questions
Can I get solar, a battery AND a heat pump for free under the Warm Homes Plan?
Yes, if you qualify for the Warm Homes Local Grant (EPC D–G, income ≤£36,000). The WH:LG can fund all three measures in a single package, up to £30,000.
Does Alliant Energy install all three measures?
Yes. Alliant Energy is MCS-certified for solar PV, battery storage and heat pump installations. We handle the complete package with no subcontracting.
Related Warm Homes Plan guides
