What £6,000 to £12,000 Buys in Solar

What actually moves the price of a solar system?

Three things do most of the work. Panel count sets how much electricity you can generate, and more panels means more roof space, more mounting hardware and a bigger inverter to handle the extra output. Battery size, or no battery at all, is the second lever: a battery lets you store daytime generation to use in the evening instead of drawing from the grid, but it adds meaningfully to the bill, and a bigger battery costs more than a small one.

The third lever is roof complexity. A straightforward single-pitch roof with easy scaffolding access costs less to work on than a steep, multi-face roof, a roof with dormers, or one that needs extra access equipment to reach safely. Older roof coverings such as slate can also need specific mounting hardware rather than the standard hooks used on modern tiles, which adds a little to the labour side without changing the panels or battery themselves.

Two homes with an identical number of panels can still end up on different quotes once you factor in roof shape, additional structural surveys, and battery choice. That is why a proper quote is itemised line by line rather than handed over as a single number with no breakdown.

What does an entry-level system look like?

At the entry end, from around £3,999 up to roughly £6,000, you are typically looking at a smaller panel count, often solar-only with no battery, fitted on a straightforward roof. This tier suits flats, bungalows and smaller houses with modest daytime electricity use, where the priority is cutting the day-rate bill rather than storing power for the evening.

A typical entry-level specification includes scaffolding, the panels themselves, an inverter sized correctly for the system, and full DNO paperwork, the grid network paperwork covered in more detail on our install day guide. Nothing on that list is optional extra work bolted on afterwards, it is what a solar install actually requires from the first day on site.

Households at this end of the range are often people who work mostly from home or during the day, so most of the electricity the panels generate gets used as it is produced rather than needing to be stored.

What does a mid-range system look like?

The middle tier, typically around £8,000 to £9,000, is usually a larger panel array paired with a battery, most often in the 5kWh region. Viking's Watchtower package is a real example of this tier: 10 Aiko 480W panels, giving roughly 4.8kW of generating capacity, with a 5.2kWh Fox ESS battery, at £8,988 fully installed with partial shading optimisation included.

This is the shape that suits a small-to-medium family home with a mix of daytime and evening electricity use, where storing surplus daytime generation to use after work makes a genuine difference rather than exporting the surplus for a lower return. It is also the tier where a battery starts to meaningfully change how much of your own generation you actually use, rather than sending most of it back to the grid.

What does a larger system look like?

At the top of the typical range, roughly £11,000 to £12,000, you get more panels and a bigger battery. Viking's Stronghold package sits here: 14 Aiko 480W panels, around 6.7kW of generating capacity, with a 9.6kWh Alpha ESS battery, at £11,030 fully installed, our most requested specification for family homes with higher daytime and evening electricity use.

For homes with the highest usage, an EV to charge, or a larger roof to fill, the Citadel package goes further still: 18 panels, roughly 8.6kW, with a 15kWh EcoFlow battery, at £15,501. That sits above the typical £6,000 to £12,000 range described here, but it is a real, currently available specification for bigger households or those wanting the maximum practical amount of self-generated cover.

What's never extra with a proper quote?

Scaffolding, DNO paperwork and MCS certification, the accreditation that proves the install meets national standards, should already be built into the number you are quoted, not billed afterwards as a surprise extra. If a quote looks unusually low compared with others for a similar panel count, it is worth asking directly whether scaffolding, the DNO application and certification are actually included, or whether they will appear later as add-ons.

At Viking, every quote includes scaffolding, DNO submission and certification as standard, along with a 10-year guarantee on the install, so the price you see at the start is the price you pay at the end, with no gap between the two.