{"id":6736,"date":"2026-02-19T13:26:39","date_gmt":"2026-02-19T11:26:39","guid":{"rendered":"https:\/\/100re.org.ua\/?p=6736"},"modified":"2026-02-19T13:27:53","modified_gmt":"2026-02-19T11:27:53","slug":"solar-in-summer-wind-in-winter-how-res-seasonality-is-already-reshaping-ukraines-power-balance-and-what-must-come-next","status":"publish","type":"post","link":"https:\/\/100re.org.ua\/en\/solar-in-summer-wind-in-winter-how-res-seasonality-is-already-reshaping-ukraines-power-balance-and-what-must-come-next\/","title":{"rendered":"Solar in Summer, Wind in Winter: How RES Seasonality Is Already Reshaping Ukraine\u2019s Power Balance \u2014 and What Must Come Next"},"content":{"rendered":"<p data-start=\"300\" data-end=\"607\">Renewables in Ukraine are no longer a \u201cnice-to-have\u201d add-on \u2014 they have become a visible part of the national power balance. But there is one crucial detail that increasingly defines whether RES can truly strengthen the system under peak demand and ongoing attacks on energy infrastructure: <strong data-start=\"591\" data-end=\"606\">seasonality<\/strong>.<\/p>\n<p data-start=\"609\" data-end=\"1151\">In an NV article, former CEO of Ukrenergo Volodymyr Kudrytskyi describes the trend in practical terms: <strong data-start=\"712\" data-end=\"814\">from March to October, solar generation can cover up to 20\u201325% of national demand in certain hours<\/strong>, while <strong data-start=\"822\" data-end=\"877\">in winter, wind becomes a more critical contributor<\/strong>. Over the year, <strong data-start=\"894\" data-end=\"957\">wind and solar together account for roughly ~10% on average<\/strong>.<br data-start=\"958\" data-end=\"961\" \/>Source: NV (Volodymyr Kudrytskyi\u2019s comments), original article: <a class=\"decorated-link\" href=\"https:\/\/biz.nv.ua\/ukr\/markets\/zelena-energetika-v-ukrajini-chastka-soncya-i-vitru-zrostaye-z-bereznya-po-zhovten-50585170.html?utm_source=chatgpt.com\" target=\"_new\" rel=\"noopener\" data-start=\"1025\" data-end=\"1151\">https:\/\/biz.nv.ua\/ukr\/markets\/zelena-energetika-v-ukrajini-chastka-soncya-i-vitru-zrostaye-z-bereznya-po-zhovten-50585170.html<\/a><\/p>\n<p data-start=\"1153\" data-end=\"1360\">Below is an analytical breakdown of what these numbers mean for Ukraine\u2019s grid resilience, communities, businesses, and investors \u2014 and which next steps turn \u201cgrowth in renewables\u201d into real energy security.<\/p>\n<h3 data-start=\"1367\" data-end=\"1438\"><\/h3>\n<h3 data-start=\"1367\" data-end=\"1438\">1) What Kudrytskyi\u2019s Key Points Actually Mean \u2014 and Why They Matter<\/h3>\n<p data-start=\"1440\" data-end=\"1768\"><strong data-start=\"1440\" data-end=\"1521\">Point 1. Solar has become a meaningful balancing resource in the warm season.<\/strong><br data-start=\"1521\" data-end=\"1524\" \/>From March to October, solar can provide up to a quarter of demand during peak hours of generation. This is not symbolic: in clear weather, solar reduces daytime pressure on other generation types and supports the system when consumption rises.<\/p>\n<p data-start=\"1770\" data-end=\"2088\"><strong data-start=\"1770\" data-end=\"1837\">Point 2. Wind plays a strategic role during the hardest months.<\/strong><br data-start=\"1837\" data-end=\"1840\" \/>In the cold season, when solar output naturally drops, wind tends to be more active \u2014 exactly when demand is higher. This is the core logic of RES complementarity: <strong data-start=\"2004\" data-end=\"2087\">solar and wind contribute in different seasons, partially \u201cinsuring\u201d each other<\/strong>.<\/p>\n<p data-start=\"2090\" data-end=\"2432\"><strong data-start=\"2090\" data-end=\"2174\">Point 3. The annual share may look moderate \u2014 but the hourly impact is outsized.<\/strong><br data-start=\"2174\" data-end=\"2177\" \/>Even at ~10% averaged over a year, renewables can deliver a much higher share in specific hours. That is precisely why the RES question is never only \u201chow many MW we build\u201d \u2014 it is also about <strong data-start=\"2369\" data-end=\"2431\">grids, forecasting, flexible capacity, and balancing tools<\/strong>.<\/p>\n<h3 data-start=\"2439\" data-end=\"2524\"><\/h3>\n<h3 data-start=\"2439\" data-end=\"2524\">2) Why \u201cSolar Records\u201d Are Good News \u2014 and a Technical Challenge at the Same Time<\/h3>\n<p data-start=\"2526\" data-end=\"2613\">When solar covers 20\u201325% of demand in peak hours, the system faces two immediate tasks:<\/p>\n<p data-start=\"2615\" data-end=\"2930\"><strong data-start=\"2615\" data-end=\"2687\">(1) Move that electricity through the network to where it is needed.<\/strong><br data-start=\"2687\" data-end=\"2690\" \/>This depends on transmission\/distribution capacity and bottlenecks at substations, lines, and regional nodes. In wartime, the issue is even sharper: attacks on substations and transformers are among the most critical risks to stable supply.<\/p>\n<p data-start=\"2932\" data-end=\"3183\"><strong data-start=\"2932\" data-end=\"3034\">(2) Balance the system when solar output falls quickly (clouds\/evening) while demand remains high.<\/strong><br data-start=\"3034\" data-end=\"3037\" \/>This is a classic challenge for any country scaling PV: it requires flexibility \u2014 storage, demand response, fast reserves, and better forecasting.<\/p>\n<p data-start=\"3185\" data-end=\"3338\">This is not unique to Ukraine. Europe is seeing the same dynamic: solar hits new highs, and the value of <strong data-start=\"3290\" data-end=\"3319\">storage and grid upgrades<\/strong> rises in parallel.<\/p>\n<h3 data-start=\"3345\" data-end=\"3414\"><\/h3>\n<h3 data-start=\"3345\" data-end=\"3414\">3) Wind as a \u201cWinter Backbone\u201d \u2014 and Why It Takes Longer to Build<\/h3>\n<p data-start=\"3416\" data-end=\"3690\">The \u201clet\u2019s build more solar\u201d idea is understandable: PV projects can be deployed faster, are often easier to execute, and scale well on rooftops and industrial sites. But <strong data-start=\"3587\" data-end=\"3613\">for winter reliability<\/strong>, solar alone is not enough \u2014 and this is exactly what Kudrytskyi highlights.<\/p>\n<p data-start=\"3692\" data-end=\"3761\">At the same time, wind in Ukraine faces three structural constraints:<\/p>\n<ul data-start=\"3763\" data-end=\"4224\">\n<li data-start=\"3763\" data-end=\"3916\">\n<p data-start=\"3765\" data-end=\"3916\"><strong data-start=\"3765\" data-end=\"3784\">risk geography:<\/strong> historically, a large portion of wind capacity was concentrated in southern regions heavily affected by occupation and hostilities;<\/p>\n<\/li>\n<li data-start=\"3917\" data-end=\"4045\">\n<p data-start=\"3919\" data-end=\"4045\"><strong data-start=\"3919\" data-end=\"3944\">longer project cycle:<\/strong> land, permits, grid connection, logistics, and construction timelines tend to be longer than for PV;<\/p>\n<\/li>\n<li data-start=\"4046\" data-end=\"4224\">\n<p data-start=\"4048\" data-end=\"4224\"><strong data-start=\"4048\" data-end=\"4089\">grid constraints and interconnection:<\/strong> network limits often determine the real speed of launching new capacity \u2014 and wind projects feel this acutely due to connection scale.<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"4231\" data-end=\"4300\"><\/h3>\n<h3 data-start=\"4231\" data-end=\"4300\">4) What Follows From This: Five Practical Conclusions for Ukraine<\/h3>\n<p data-start=\"4302\" data-end=\"4577\"><strong data-start=\"4302\" data-end=\"4369\">1) RES seasonality must be built into energy security planning.<\/strong><br data-start=\"4369\" data-end=\"4372\" \/>Solar is a daytime balancing asset in warm months; wind is a cold-season asset. The RES roadmap should not be \u201cwho installs MW faster,\u201d but <strong data-start=\"4512\" data-end=\"4576\">which generation profile reduces system risks month-by-month<\/strong>.<\/p>\n<p data-start=\"4579\" data-end=\"4919\"><strong data-start=\"4579\" data-end=\"4645\">2) Flexibility is becoming as valuable as generation capacity.<\/strong><br data-start=\"4645\" data-end=\"4648\" \/>If RES can reach 20\u201325% in certain hours, every additional percentage of variable generation raises balancing requirements. That makes <strong data-start=\"4783\" data-end=\"4847\">BESS, demand-side management, forecasting, and fast reserves<\/strong> core infrastructure for the energy transition \u2014 not an optional add-on.<\/p>\n<p data-start=\"4921\" data-end=\"5184\"><strong data-start=\"4921\" data-end=\"4958\">3) Grids are the main bottleneck.<\/strong><br data-start=\"4958\" data-end=\"4961\" \/>Even perfect generation cannot help if electricity cannot pass through damaged or overloaded nodes. Under constant threats, substation modernization, redundancy, and resilient network design become national security issues.<\/p>\n<p data-start=\"5186\" data-end=\"5509\"><strong data-start=\"5186\" data-end=\"5298\">4) Decentralization + renewables + storage is the fastest path to resilience for communities and businesses.<\/strong><br data-start=\"5298\" data-end=\"5301\" \/>For critical infrastructure (hospitals, water utilities, heat supply), combining PV\/wind with storage and smart consumption management is not only about cost \u2014 it is about <strong data-start=\"5473\" data-end=\"5508\">more reliable hours of autonomy<\/strong>.<\/p>\n<p data-start=\"5511\" data-end=\"5859\"><strong data-start=\"5511\" data-end=\"5587\">5) Ukraine needs an investment \u201croadmap\u201d that matches technical reality.<\/strong><br data-start=\"5587\" data-end=\"5590\" \/>Markets move not only with engineering, but also with financial discipline and predictable rules. Sector-level issues (including debt and settlement stability) directly affect capital costs and the pace of new projects \u2014 especially for larger wind and grid investments.<\/p>\n<h2 data-start=\"5866\" data-end=\"5929\"><\/h2>\n<h2 data-start=\"5866\" data-end=\"5929\">Global 100% RE Ukraine: What We Emphasize in This Discussion<\/h2>\n<ol data-start=\"5931\" data-end=\"6296\">\n<li data-start=\"5931\" data-end=\"6092\">\n<p data-start=\"5934\" data-end=\"6092\"><strong data-start=\"5934\" data-end=\"5975\">Renewables already support the system<\/strong> \u2014 the next step is moving from \u201cgeneration as a goal\u201d to <strong data-start=\"6033\" data-end=\"6069\">flexibility + grids + resilience<\/strong> as the new standard.<\/p>\n<\/li>\n<li data-start=\"6093\" data-end=\"6181\">\n<p data-start=\"6096\" data-end=\"6181\"><strong data-start=\"6096\" data-end=\"6134\">Solar and wind must scale together<\/strong>, because they cover different seasonal gaps.<\/p>\n<\/li>\n<li data-start=\"6182\" data-end=\"6296\">\n<p data-start=\"6185\" data-end=\"6296\"><strong data-start=\"6185\" data-end=\"6218\">Storage and demand management<\/strong> are the tools that turn RES seasonality into an advantage rather than a risk.<\/p>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Renewables in Ukraine are no longer a \u201cnice-to-have\u201d add-on \u2014 they have become a visible part of the national power balance. But there is one crucial detail that increasingly defines whether RES can truly strengthen the system under peak demand and ongoing attacks on energy infrastructure: seasonality. In an NV article, former CEO of Ukrenergo [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":6734,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":"","_wp_rev_ctl_limit":""},"categories":[50],"tags":[],"class_list":["post-6736","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Solar in Summer, Wind in Winter: How RES Seasonality Is Already Reshaping Ukraine\u2019s Power Balance \u2014 and What Must Come Next - Global 100 RE UKRAINE<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/100re.org.ua\/en\/solar-in-summer-wind-in-winter-how-res-seasonality-is-already-reshaping-ukraines-power-balance-and-what-must-come-next\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Solar in Summer, Wind in Winter: How RES Seasonality Is Already Reshaping Ukraine\u2019s Power Balance \u2014 and What Must Come Next - Global 100 RE UKRAINE\" \/>\n<meta property=\"og:description\" content=\"Renewables in Ukraine are no longer a \u201cnice-to-have\u201d add-on \u2014 they have become a visible part of the national power balance. But there is one crucial detail that increasingly defines whether RES can truly strengthen the system under peak demand and ongoing attacks on energy infrastructure: seasonality. In an NV article, former CEO of Ukrenergo [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/100re.org.ua\/en\/solar-in-summer-wind-in-winter-how-res-seasonality-is-already-reshaping-ukraines-power-balance-and-what-must-come-next\/\" \/>\n<meta property=\"og:site_name\" content=\"Global 100 RE UKRAINE\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/100REUA\/\" \/>\n<meta property=\"article:published_time\" content=\"2026-02-19T11:26:39+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-19T11:27:53+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/100re.org.ua\/wp-content\/uploads\/2026\/02\/san_gorgonio_pass_wind_farm_01-2-scaled-e1771500384850.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"2560\" \/>\n\t<meta property=\"og:image:height\" content=\"885\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"vseo_admin\" \/>\n<meta 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But there is one crucial detail that increasingly defines whether RES can truly strengthen the system under peak demand and ongoing attacks on energy infrastructure: seasonality. 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