Is an Air Source Heat Pump expensive to run?

A properly sized and correctly installed Air Source Heat Pump is incredibly cost-effective to run. In fact, it stands out as the most economical heating system when compared to other electric or fossil fuel alternatives. A well-installed Air Source system can generate approximately 4kWh of heat for every 1kWh of electricity it consumes. By dividing the cost of 1kWh of electricity by 4, you can calculate the running cost of the system. Here’s an interesting fact that often goes unnoticed: 100% of the heat energy produced by the Heat Pump is delivered to your property, whereas traditional boilers can lose up to 20% of their heat energy through the flue with the exhaust gases.

How many Solar Panels do I need?

The number of panels needed varies from person to person and property to property. It primarily depends on the size of the area you have available, such as your roof space. Another crucial factor is how much energy you use and when you need it. It’s not as straightforward as saying, “I use 10,000 kWh per year, so just fit a system to meet that.” Keep in mind that panels generate less energy during winter, which might coincide with when you use the most energy. To determine your requirements accurately, take a closer look at your appliances and when you use them. Do you have additional electricity-intensive devices like an electric car or hot tub? Building your solar system around your specific energy needs and considering your lifestyle adjustments can help you maximize the benefits of Solar PV.

How does home battery storage installation work?

Home battery storage installation involves integrating a battery system with your existing energy setup, allowing you to store excess energy for use during peak times.

Solar Battery Storage Explained: Sizing, Placement & Regulations in the UK

Adding a solar battery to your PV system is one of the best ways to get more from your renewable energy investment.
It allows you to store excess solar energy during the day and use it later — in the evening, at night, or during peak tariff times.

At Sustain Heating, we help homeowners across the South West design, size, and install smart solar battery systems built around their homes and energy habits.

Why Add Battery Storage to Your Solar System?

Solar panels generate electricity when the sun shines, but most households use more energy in the mornings and evenings. A battery bridges that gap, letting you:

Store unused solar power for later use
Rely less on the National Grid
Reduce your bills further
Maintain power during outages (with hybrid systems)

It’s the perfect way to make your home more efficient, sustainable, and energy independent.

⚙️ How Much Battery Storage Do You Need?

The ideal battery size depends on your energy use, lifestyle, and whether you want to maximise off-grid performance or cost savings.

Household Type	Recommended Battery Size	Daily Energy Use	Notes
Small home / 2–3 people	5 kWh	Low–medium	Covers basic evening use
Medium family home	8–10 kWh	Medium–high	Suitable for most 3–4 bed homes
Large family / EV owner	12–15 kWh	High	Ideal for high usage or EV charging

Other factors to consider:

Energy tariffs: Off-peak charging allows you to buy cheap electricity overnight.
Future-proofing: If you plan to add an EV or heat pump, size up slightly now.
Budget: Larger batteries cost more but increase independence and long-term value.

Our experts analyse your historic energy usage and roof capacity to recommend the ideal battery size for your home.

📍 Where Should Solar Batteries Be Installed?

Placement matters — for both performance and safety.

According to UK regulations and manufacturer guidelines, batteries should:

Be installed near your mains supply for accurate grid monitoring.
Have adequate ventilation to prevent overheating.
Be accessible for servicing and maintenance.

🚫 Where Batteries Can’t Go

❌ Lofts (now prohibited by safety standards)
❌ Cellars without two exits
❌ Within 1 metre of doors or windows

✅ Best Locations

Utility rooms or garages — offer space, stability, and easy access.
Outdoors — weatherproof batteries are designed for external installation.
Dedicated cupboards — ideal for integrated systems in new builds.

A correctly placed system operates more efficiently, stays cooler, and lasts longer.

⚖️ Are Solar Batteries Regulated in the UK?

While the batteries themselves aren’t directly regulated, their installation is.

Here’s what you need to know:

Installers must be MCS-accredited and hold a battery-specific qualification.
The system must include DNO (District Network Operator) approval documents.
Without MCS certification, you won’t qualify for Smart Export Guarantee (SEG) payments.

This ensures your system is safe, compliant, and eligible for export payments and manufacturer warranties.

🧠 Why Quality & Accreditation Matter

Not all batteries are created equal — and neither are installers. Choosing a reputable, MCS-accredited company like Sustain Heating ensures:

The system is correctly sized and installed.
DNO approval is handled on your behalf.
All components meet international safety standards.
You maintain full eligibility for SEG and manufacturer support.

Our fully employed engineers handle every installation from design to aftercare — no subcontractors, no shortcuts.

💡 Typical Battery Warranties & Lifespan

Component	Typical Warranty	Lifespan
Battery unit	10–15 years	15–20 years
Inverter	10 years	12–15 years
Workmanship (MCS)	2–10 years	—

Regular servicing and proper placement extend both lifespan and efficiency — helping you maximise return on investment.

✅ Why Choose Sustain Heating?

Fully MCS, NICEIC, and TrustMark accredited.
Experts in solar PV + battery integration.
Transparent design, quote, and installation process.
Excellent customer ratings: 4.9/5 on Which? Trusted Traders, 4.7/5 on Trustpilot.
Long-term support and maintenance packages for peace of mind.

We design every solar system around your home and habits — ensuring maximum energy independence and value.

🌞 Final Thoughts

Solar battery storage transforms a good solar setup into a great one.
By storing excess daytime energy, you can power your home through the night, reduce reliance on the grid, and save money long term.

At Sustain Heating, we’ll help you choose the perfect battery size, placement, and system design — ensuring safe installation, strong performance, and full compliance with UK regulations.