{"id":3477,"date":"2026-02-19T18:00:00","date_gmt":"2026-02-19T18:00:00","guid":{"rendered":"https:\/\/climatevdo.com\/?p=3477"},"modified":"2026-02-19T18:00:00","modified_gmt":"2026-02-19T18:00:00","slug":"how-solar-and-batteries-help-keep-lights-on-during","status":"publish","type":"post","link":"https:\/\/climatevdo.com\/?p=3477","title":{"rendered":"How solar and batteries help keep lights on during\u2026"},"content":{"rendered":"
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Read that again: a\u00a06<\/span>-GW<\/span> shortfall covered by 43<\/span>\u00a0GW<\/span> of batteries.<\/p>\n<\/div>\n

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Bennett\u2019s response to this rather obvious mismatch is to reframe the question entirely. Instead of asking whether batteries can cover peak demand windows \u2014 which is what they\u2019re designed to do \u2014 he converts the entire battery fleet into a\u00a0single energy metric: 77<\/span> GWh, which he says is \u200b\u201c<\/span>equivalent to running a\u00a0single 1<\/span>\u00a0GW<\/span> thermal power plant for the duration of this three-day storm.\u201d It\u2019s a\u00a0striking comparison. It\u2019s also irrelevant to how batteries actually operate in\u00a0ERCOT<\/span>.<\/p>\n<\/div>\n

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Nobody designs, operates, or dispatches battery storage as a\u00a072<\/span>-hour baseload resource. Batteries are designed to shave peaks, provide rapid frequency response, and bridge the morning and evening demand ramps when solar output is low. A\u00a043<\/span>-GW<\/span> battery fleet can inject enormous amounts of power during exactly the narrow peak windows that Bennett\u2019s own Figure 2<\/span><\/a> identifies as the problem periods. During Winter Storm Heather, ERCOT<\/span>\u2019s post-storm analysis<\/a> confirmed that batteries were \u200b\u201c<\/span>partially supplementing the lack of solar generation available\u201d during the coldest pre-sunrise hours \u2014 the exact scenario Bennett says they can\u2019t handle.<\/p>\n<\/div>\n

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The thermal backbone he takes for granted<\/strong><\/h2>\n

Perhaps the most revealing aspect of Bennett\u2019s analysis is what he doesn\u2019t discuss: the massive existing fleet of gas, coal, and nuclear generation that forms ERCOT<\/span>\u2019s backbone. He projects 103<\/span>,802<\/span>\u00a0MW<\/span> of firm winter output in 2030<\/span>. That fleet \u2014 overwhelmingly fossil and nuclear \u2014 carries the grid through the vast majority of every storm hour in his model. The assumed thermal outage rate is only 12<\/span>% \u2014 a\u00a0figure drawn from ERCOT\u2019s reliability assessments \u2014 meaning 88<\/span>% of the thermal fleet performs through the modeled storm.<\/p>\n<\/div>\n

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Bennett constructs a\u00a0scenario in which batteries fail by defining success as continuous 72<\/span>-hour discharge, while simultaneously taking for granted the thermal fleet of 80<\/span>-plus GW<\/span> that keeps the lights on during the bulk of his modeled event. The batteries aren\u2019t replacing that fleet. They\u2019re supplementing it during the peak demand windows that the thermal fleet alone can\u2019t quite cover \u2014 which is precisely the role that ERCOT<\/span>\u2019s system planning envisions for\u00a0them.<\/p>\n<\/div>\n

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None of these experts are claiming the grid faces zero risk. ERCOT<\/span>\u2019s probabilistic risk assessment<\/a>, as reported in NERC\u2019s winter reliability assessment, puts the chance of controlled load shed this winter at about 1<\/span>.8<\/span>% \u2014 low, but not zero. The question is whether Bennett\u2019s framework for evaluating that risk is sound, and on that point, the data he himself relies on says\u00a0no.<\/p>\n<\/div>\n

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The agenda behind the analysis<\/strong><\/h2>\n

Bennett\u2019s piece concludes that ERCOT<\/span> needs \u200b\u201c<\/span>market design changes that redirect revenue away from wind and solar and toward resources that can work in all types of weather conditions.\u201d That\u2019s a\u00a0policy preference dressed up as an engineering conclusion. His own data doesn\u2019t support it.<\/p>\n<\/div>\n

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What his data actually shows is that ERCOT<\/span> has a\u00a0manageable peak-demand gap that battery storage is well positioned to address, supplemented by a\u00a0massive thermal fleet that provides the overwhelming majority of firm capacity during winter events. The December 2025<\/span> launch of ERCOT<\/span>\u2019s Real-Time Co-optimization Plus Batteries (RTC<\/span>+B) market<\/a> is specifically designed to optimize exactly this kind of coordination \u2014 dispatching storage where and when it creates the most grid\u00a0value.<\/p>\n<\/div>\n

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The real question isn\u2019t whether batteries can run for 72<\/span>\u00a0hours straight. No one is asking them to. The question is whether the combination of 100<\/span>-plus GW<\/span> of firm thermal capacity, a\u00a0rapidly growing battery fleet, improving demand-response capabilities, and better weatherization standards can keep the lights on during winter storms. The last five years of actual performance \u2014 including three consecutive record-breaking winter peaks \u2014 provide a\u00a0clear answer.<\/p>\n<\/div>\n

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Bennett\u2019s analysis works only if you accept his premise that battery storage should be evaluated as a\u00a0baseload replacement rather than what it actually is: a\u00a0fast-dispatching, peak-shaving complement to the thermal fleet, which helps dramatically in firming up renewables like wind and solar. Reject that premise, and his crisis narrative dissolves into the numbers he himself provides.<\/p>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"

Read that again: a\u00a06-GW shortfall covered by 43\u00a0GW of batteries. Bennett\u2019s response to this rather obvious mismatch is to reframe the question entirely. Instead of asking whether batteries can cover peak demand windows \u2014 which is what they\u2019re designed to do \u2014 he converts the entire battery fleet into a\u00a0single energy metric: 77 GWh, which […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35],"tags":[],"class_list":["post-3477","post","type-post","status-publish","format-standard","hentry","category-green-tech"],"_links":{"self":[{"href":"https:\/\/climatevdo.com\/index.php?rest_route=\/wp\/v2\/posts\/3477","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/climatevdo.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/climatevdo.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/climatevdo.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/climatevdo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3477"}],"version-history":[{"count":0,"href":"https:\/\/climatevdo.com\/index.php?rest_route=\/wp\/v2\/posts\/3477\/revisions"}],"wp:attachment":[{"href":"https:\/\/climatevdo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3477"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/climatevdo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3477"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/climatevdo.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3477"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}