The 11 bottlenecks of Greece's energy transition
Eleven structural bottlenecks, from grid curtailment and missing batteries to gas-set prices, Russian gas, slow EV charging and permitting backlogs, are keeping Greek bills high and slowing the transition.
Greece is transforming: more solar panels, more wind turbines, more electric cars.
But beneath the headlines, deep structural problems are slowing everything down and keeping electricity bills high.
This article maps all 11…
The grid
1. Clean energy is being generated, but there's nowhere to send it
When too much renewable power is produced at the same time, the grid can't handle it, so excess production is switched off/wasted. In 2025, 1,867 GWh of renewable energy was curtailed (more than double 2024 levels), equivalent to 6.6% of all green electricity generated. Renewable developers can wait years just to get a grid connection approved. (previous article covering this).
2. There are no large batteries to store what's produced
Solar peaks at midday. Demand peaks in the evening. Without large-scale batteries to bridge that gap, solar gets wasted and gas turbines are fired up instead. Investors and banks are already wary of financing new battery projects because future revenues are still too uncertain.
3. Dozens of islands still run on diesel
A significant number of Greek islands are not connected to the main electricity grid and rely on expensive, dirty diesel generators. The cable connecting Crete to the mainland only began trial operations in late 2024, while the Dodecanese and Northern Aegean are still isolated.
Market structure
4. Electricity prices are set by gas, even when the sun is shining
In Europe's electricity markets, the most expensive source (e.g. gas, solar, coal, etc.) running at any moment sets the price for everyone. In Greece, gas accounts for around 40% of electricity generated, so even when solar is producing strongly, gas is still setting the price much of the time. So even when cheap solar is producing most of the country's power, household bills reflect gas market prices. (previous article covering this).
5. The companies best placed to fix the problem benefit from not fixing it
Under this pricing system, when gas prices spike, owners of existing solar or wind farms make windfall profits because all electricity sells at the gas price. The state-controlled utility PPC and energy group Metlen are among the companies in this position. Asking them to invest in batteries (which would end those windfalls) is effectively asking them to reduce their own income. (previous article covering this).
6. The wholesale electricity price goes negative at midday, scaring off investors
When solar floods the grid, wholesale energy prices can go negative, meaning generators are effectively paying to get rid of their excess electricity. From Jan–Sep 2025, Greece saw 280 hours with zero or negative electricity prices, 89 of which were negative (1.4% of the total). These cases make renewable energy generation projects less predictable, less profitable and therefore, as with 2 above, less attractive to investors, so capital quietly shifts to other markets.
Dependence on Russian gas
7. Greece has one of Europe's most import-dependent energy systems, and is highly exposed to Russia
Greece imports around 78% of the energy it consumes (vs. EU avg. 58%). For most of 2024, Russian gas accounted for ~55% of Greek gas imports (vs. EU avg. 13%). Domestic gas consumption grew by 30% in 2024, the fastest increase in the EU that year (vs. EU avg. 0.3%). (previous article covering this).
Supply growth > demand growth
8. Greece is building green energy faster than it can use it
Solar and wind capacity are rising quickly, but factories, homes, and businesses are not electrifying fast enough to absorb this extra power. Sectors like cement, metals, and desalination could use large amounts of cheap midday solar, but the contracts and incentives to make that happen aren’t yet in place. Supply is running ahead of demand, and the gap is widening.
9. Electric cars are booming, but the charging network isn't ready and cars charge at the wrong time
New electric car registrations jumped +300% in H1 2025, but 93% of fast charging stations are in Athens and Thessaloniki. Greece had a target of 2,728 fast DC chargers by 2025; only 808 are operational. Without smart charging that shifts demand to sunny midday hours, EVs risk adding to the evening peak instead of helping to smooth it.
10. Subsidies for fossil fuels make the transition more expensive for everyone
Greece still provides significant financial support for fossil fuels via tax breaks and bill charges. The OECD estimates that fossil fuel support exceeded €1.9B in 2020. This represented >25% of all energy tax revenues, among the highest share in the EU. These subsidies make clean alternatives look less attractive and reduce the incentive for households and businesses to use less energy.
Bureaucracy
11. Paperwork is blocking rooftop solar, the easiest win available
Rooftop solar and home batteries are the fastest, cheapest way to ease pressure on the grid, but projects are stuck in queues because of administrative backlogs, not because of any shortage of technology or money. This is happening despite new EU‑wide rules designed to fast-track permits for wind, solar and grids. All EU countries except Denmark missed the July 2024 deadline to write these rules into national law; by June 2025, the European Commission judged that only Greece and Finland were still significantly off-track, triggering a formal escalation in Brussels.
These 11 problems don't exist in isolation… they reinforce each other. Wasted solar makes batteries less commercially viable. Expensive gas keeps bills high. Slow permitting delays the fix.
The good news: each of these problems has a documented solution being tested somewhere in Europe/Mediterranean.
Stay tuned to hear more about these solutions.
Sources
The Green Tank – Trends in electricity production, December 2025
Ricardo – Renewable curtailments at 7% in 2025: mounting pressure on Greek renewables and the case for storage
The Voice of Renewables – Greece’s renewable energy 2025: growth surges amid grid and storage challenges
Hellenic Association for Energy Economics (HAEE) – Greek Energy Market Report 2022
Balkan Green Energy News – Negative prices threaten future payments to Greek renewable energy producers (May 2025)
The Green Tank – Trends in fossil gas consumption and imports, July 2024
Shenzhen Anari Energy – Electric vehicle charging infrastructure in Greece: a strategic industry analysis (2025)
P3 Group – EV charging experience, Greece (Sep 2024)
European Commission – June 2025 infringement package: key decisions on energy
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