Weekly Solar Insights: The UK's October Cap Lands This Month, Italy Retires Scambio sul Posto, and Germany's 2027 Cliff Becomes a Slope (Week of 17 August 2026)

August 17, 2026

If you only have five minutes for energy news this week, here is the short version. The UK's next price cap is published within days. Germany's much-discussed 2027 subsidy cliff has been reshaped into something gentler. And Italy has quietly retired the scheme that a whole generation of solar owners grew up with.

None of it is cause for alarm. All of it is worth understanding before you make a decision about your own roof.

The UK: the October price cap arrives before the end of the month

Ofgem will publish the cap covering 1 October to 31 December 2026 by 26 August. Until then, the current cap for 1 July to 30 September stands at £1,663 a year for a typical dual-fuel household paying by direct debit^[1], which was itself a 13% jump on the previous quarter.

Forecasts for October are unusually spread out, and that is worth knowing before a headline number lands in your feed. Cornwall Insight has been pointing at roughly £1,899 a year, while E.ON Next and Sainsbury's Energy have both been closer to £1,747^[3]. Those are estimates, not decisions, and forecasts have moved substantially in the run-up to previous announcements.

What we would actually do about it: not much, honestly. The cap sets a maximum unit rate, not your bill, and if you already have panels the more interesting number is what you are paid for the electricity you export.

That is where the real money is hiding. Export rates under the Smart Export Guarantee currently run from just over 3p to more than 30p per kilowatt-hour^[4], which means two identical systems can earn hundreds of pounds apart purely on tariff choice. At the top end, Octopus Intelligent Flux has been paying up to 30.31p/kWh for exports in the 4pm to 7pm peak window^[5], and among flat rates, So Energy's So Bright Export was quoted at 20p/kWh as of July 2026. Most households with a standard 3 to 5 kW system earn between £50 and £320 a year from export income^[6].

One honest caveat: the headline-grabbing rates usually come with strings attached, such as specific battery or inverter hardware, or being on the same supplier's import tariff. Check the eligibility rules before you switch, and compare the export rate together with the import rate rather than in isolation.

Germany: August's rate is fixed, and 2027 now looks like a slope rather than a cliff

The step-down everyone expected duly arrived. Since 1 August 2026, roof systems up to 10 kW receive 7.70 cents/kWh for partial feed-in and 12.22 cents/kWh for full feed-in, down from 7.78 and 12.34 cents respectively^[7]. Those rates apply to systems commissioned from 1 August 2026 through 31 January 2027, and once you are in, the rate is paid for 20 years^[8]. Existing installations are not affected by the change.

The more significant development is what happens after that. The original plan was to remove feed-in payments for small new systems entirely from 2027. Following considerable criticism, that has been reworked into a graduated phase-out: operators of systems under 50 kW installed from 2027 onward would receive a transitional payment for 36 months set roughly 1 cent per kWh below the regular feed-in tariff^[9].

Treat that as the current direction of travel rather than a settled fact, because the detail is still moving through the legislative process. But the practical takeaway is calmer than the headlines of a few months ago suggested.

What it means for you: if you are already deep in quotes and planning, commissioning before 31 January 2027 does lock in today's rate for two decades. That is a real benefit. It is not, however, a reason to rush a bad installation. Feed-in payments are now a modest slice of the economics of German home solar. The electricity you use yourself, valued at what you would otherwise pay your supplier, does most of the heavy lifting.

Italy: Scambio sul Posto has closed, and Ritiro Dedicato takes over

This is the change most likely to catch Italian homeowners out, because Scambio sul Posto was the default answer for so long.

For new systems, it is no longer available. The scheme closed to new entrants, with the final window ending on 26 September 2025, and it has not applied to systems entering service after the end of May 2025^[10]. New installations now use Ritiro Dedicato, the GSE's dedicated purchase scheme, which pays the hourly zonal price, indicatively around €0.10 to €0.13/kWh, or a guaranteed minimum price of €0.0475/kWh for photovoltaic systems up to 1 MW^[11].

If you already have an SSP agreement, you are not being cut off. Agreements less than 15 years old run to their natural expiry, and those past that threshold switch to Ritiro Dedicato automatically^[12].

On the incentive side, the picture stays favourable. The 50% tax deduction is confirmed for 2026 on a main home, covering photovoltaic installations up to 20 kW even without a wider renovation, with a spending cap of €96,000 per property unit^[13], recovered as ten equal annual instalments through your income tax return. Reduced VAT of 10% instead of 22% still applies to the equipment and the installation work.

What it means for you: the value of a kilowatt-hour you use yourself has just pulled further ahead of the value of one you send to the grid. Under SSP, exporting and importing partly cancelled each other out. Under RID, they do not. Sizing the system around what your household actually consumes, and shifting big loads into daylight hours, matters more in Italy in 2026 than it did three years ago.

The one thread running through all three markets

Look past the different acronyms and the same thing is happening in Germany, the UK and Italy: what you are paid for exported solar is drifting down, and what you save by using your own solar is holding up.

That does not make solar a worse investment. It does change how you should design and run a system. Three practical consequences:

Size for your consumption, not for your roof. A bigger array is not automatically a better one when the surplus earns single-digit cents.
Shift what you can into the middle of the day. Dishwasher, washing machine, hot water, EV charging. This is free, and it is the highest-value habit available to you.
Judge a battery on the gap between your import and export rates. A wide gap makes storage attractive. A generous export tariff narrows it. Do that sum with your own numbers before committing.

Seeing what this means for your own roof

Every figure above is a market average. Your roof is not average. Orientation, tilt, shading, roof area and your household's consumption pattern all move the answer, sometimes by a lot.

Whenever you are curious, you can enter your address and trace your roof with the free Solar Roof Planner. It gives you a realistic estimate of panel count, system size, yearly output, savings, payback and a sense-check on whether a battery makes sense for you. It is free, it takes a couple of minutes, and there is nothing to sign up for.