{"id":431537,"date":"2026-03-16T08:54:58","date_gmt":"2026-03-16T07:54:58","guid":{"rendered":"https:\/\/climatescience.press\/?p=431537"},"modified":"2026-03-16T08:54:59","modified_gmt":"2026-03-16T07:54:59","slug":"storing-green-energy-to-last-germany-10-days-would-require-a-60-million-tonne-battery","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=431537","title":{"rendered":"Storing Green Energy To Last Germany 10 Days Would Require A 60-Million Tonne Battery"},"content":{"rendered":"
\n
\"\"<\/figure>\n<\/div>\n\n\n

From No Trick Zone<\/a><\/p>\n\n\n\n

By P Gosselin<\/a><\/em><\/p>\n\n\n\n

An article at the European Institute for Climate & Energy (EIKE) website here<\/a> takes a critical look at whether battery parks would be feasible to fully secure Germany\u2019s weather-dependent power generation from wind and solar. <\/strong><\/p>\n\n\n

\n
\"\"
Storing electric power to last Germany 10 days would require a 60 million-tonne battery. Image generated by Grok AI<\/a>. <\/em><\/figcaption><\/figure>\n<\/div>\n\n\n

Germany currently has a battery capacity of approximately 26 gigawatt-hours (GWh), the majority of which (approx. 20 GWh) consists of private home storage systems.<\/p>\n\n\n\n

Only large-scale storage systems (approx. 4.3 GWh) are considered truly \u201cgrid-serving.\u201d Currently, these could cover only about 5% of summer electricity demand for 1.5 hours.<\/p>\n\n\n\n

The \u201cGermany battery\u201d: What would be required?<\/strong><\/p>\n\n\n\n

Energy expert Staffan Reveman<\/a> presented a plausibility calculation for making Germany self-sufficient (without fossil fuel plants or imports). The results are sobering.<\/p>\n\n\n\n

10 hour buffer<\/strong><\/p>\n\n\n\n

To achieve just 10 hours of buffer, a capacity of 600 GWh would be required \u2013 24 times the current inventory and representing a material weight of approx. 3 million tonnes.<\/p>\n\n\n\n

10 days of buffer<\/strong><\/p>\n\n\n\n

To bridge a ten-day \u201cDunkelflaute<\/em>\u201d (dark doldrums) in winter with a 50 GW load, 12,000 GWh would be needed. This is 470 times the current total capacity and 2,800 times the current large-scale storage. Such a battery would weigh 60 million tons. A modern factory (like CATL in Thuringia) would theoretically need 857 years to produce this amount.<\/p>\n\n\n\n

Constant replacement<\/strong><\/p>\n\n\n\n

A central drawback is the limited durability of batteries (approx. 10\u201315 years). To operate a system of 12,000 GWh permanently, batteries would need to be replaced conbtinuusly. Reveman calculates that approximately 57 mega-factories would need to produce continuously just to maintain this inventory.<\/p>\n\n\n\n

Astronomical cost<\/strong><\/p>\n\n\n\n

A simulation for the Traunstein district showed that self-sufficient supply via wind, solar, and batteries would increase wholesale electricity costs from 6 cents to 217 cents per kwh.<\/p>\n\n\n\n

Moreover, a 240-hour battery (12,000 GWh) would require an area of approx. 600 square kilometers (roughly two-thirds the size of Berlin).<\/p>\n\n\n\n

Conclusion<\/strong><\/p>\n\n\n\n

The EIKE author concludes that batteries alone cannot guarantee a secure power supply. Even under massive expansion scenarios for 2030, gaps remain (especially in winter) that would strictly require a flexible power plant reserve (e.g., gas-fired plants) or imports.<\/p>\n\n\n\n

Furthermore, lack of grid stability (missing rotating mass) is cited as a significant technical hurdle.<\/p>\n","protected":false},"excerpt":{"rendered":"

An article at the European Institute for Climate & Energy (EIKE) website here takes a critical look at whether battery parks would be feasible to fully secure Germany\u2019s weather-dependent power generation from wind and solar. <\/p>\n","protected":false},"author":121246920,"featured_media":431542,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","_crdt_document":"","advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[1],"tags":[691840198,691824503,691818051,691835264,691841898,691818728],"class_list":{"0":"post-431537","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","6":"hentry","7":"category-uncategorized","8":"tag-dunkelflaute-dark-doldrums","9":"tag-electricity-costs","10":"tag-germany","11":"tag-grid-stability","12":"tag-storage-systems","13":"tag-wind-and-solar","15":"fallback-thumbnail"},"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/03\/0-Storing-Green-Energy-To-Last-Germany-10-Days-Would-Require-A-60-Million-Tonne-Battery.jpg?fit=784%2C1168&ssl=1","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paxLW1-1Ogh","jetpack-related-posts":[{"id":293585,"url":"https:\/\/climatescience.press\/?p=293585","url_meta":{"origin":431537,"position":0},"title":"Consensus 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