In this issue of Joule, Steffen et al. tackle a challenging topic to quantify and project costs for operation and maintenance (O&M) of solar and wind power plants in Germany. They note that O&M costs can be 20%–25% of overall costs and find that such costs have decreased, resulting in common overestimates of O&M costs.

中文翻译：

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我们仍在高估风能和太阳能的成本吗？

在本期《焦耳》中，Steffen等人。解决一个具有挑战性的主题，以量化和预测德国太阳能和风力发电厂的运营和维护（O＆M）成本。他们指出，运维成本可能占总成本的20％至25％，并发现此类成本已经降低，导致对运维成本的普遍高估。