Improve EPC ratings with solar for flats

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microgrid, the solshare

Recent changes to the Energy Performance Certificate (EPC) legislation require landlords to ensure their rental properties are up to scratch on the energy efficiency front. All properties across England, Scotland and Wales that are being built or promoted for let or sale as an entire property must have an EPC. As of 2025, all rentals will need a rating of C or higher. From 2028 this will apply to all properties. The EPC provides details on typical energy use and costs for the property, with tips on how to make it greener and more cost-efficient. Alongside the changes to legislation is the reality of energy price hikes. It makes sense that now more than ever, everyone – from homeowners to social housing providers and property developers – want the best EPC rating possible and are intrigued about solar for flats.

While there are several options on the market, solar power is definitely the biggest impact option increasing the EPC rating of flats and houses.

First, let’s look at how property energy efficiency is calculated. We’ll then check out why solar is one of the best return on investments for EPC increase.

  • How is Energy Efficiency Calculated?
  • Solar = Flexibility
  • The SolShare = Full Grade Increase
  • Solar for Flats = More Power for Your Pound

 

How Is Energy Efficiency Calculated?

The energy performance of a property is measured by using the Standard Assessment Procedure, or SAP, method. The government uses the SAP to assess how much energy a home will consume under average assumptions for resident habits and behaviour.

An EPC includes two charts and rating bands. You can see the current rating band and the potential rating if you complete the recommendations for the property. The numbers for each rating are based on the SAP, from 1-100 points. The higher the points, the better the efficiency. As you can see, the highest rating of an A is 92-100 points and the lowest grade of G is 1-20.

Improve EPC Rating, Solar for Flats

Image Source: edfeenergy.com

 

Solar = Flexibility

Gone are the days of rooftop solar only benefiting and being available to standalone homes and offices. For years, flats have been locked out of the picture when it comes to accessing solar solutions for energy efficiency.  A lower carbon footprint and cheaper electricity bills are now open to tenants and flat owners, thanks to The SolShare.

 

What is The SolShare?

The SolShare is a system that creates a private infrastructure for solar energy sharing in multi-dwelling buildings. Power is directed from a single system on the shared roof space to whichever flats are connected independently behind their meter. The SolShare is the most straightforward and cost-effective solution to rooftop solar for flats. This is because the tenants or flat owners don’t need to sign up to additional billing services or solar trading platforms.

The only hardware of its kind, the SolShare is rapidly growing in popularity across the globe. There are now thousands of residents embracing lower power bills and reduced carbon emissions thanks to the SolShare.

the Solshare

The SolShare = Full Grade Increase

A typical SolShare system can gain as many as 5-15 SAP points, which directly impacts the property EPC rating. As we saw in the tables above, each band is approximately ten points. By installing a standard SolShare system on flats, it’s almost certain that the EPC rating will increase by at least one grade.

When designing the system, we can identify which flats in the building that need a higher boost to their EPC rating. We can then allocate a higher proportion of solar to those flats, so you’re able to achieve the desired EPC rating for every flat in the building.

 

Solar for Flats = More Power for Your Pound

The entire SolShare solar solution typically costs between £2,000 – £4,000 per flat, which is relatively low compared to other EPC initiatives. All while lowering the electricity bills for the residents within the flats.

In fact, the EPC to cost benefit is so attractive, the Social Housing Decarbonisation Fund team of BEIS have stated that even though the SHDF Wave 2 is a fabric first approach, they would accept SolShare solar systems as part of the bids, as long as it is contained within the 50% contributed portion of the bid.

 

The Bottom Line

Now that the power of solar has been unlocked with rooftop solar for flats via the SolShare, a whole new world of energy efficiency is available. The SolShare is cost-effective, boosts EPC rankings quickly and provides benefits from day one.

At Allume, we believe everyone should have the power to reduce their electricity bill and carbon footprint. The SolShare is the only hardware for sharing rooftop solar for flats and we’d love to help you get on board. Contact us today to discuss your options.

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