California Opens a Path for Lower-Cost Plug-In Solar — Eter News

Enriched Analysis 深度解析

California Opens a Path for Lower-Cost Plug-In Solar加州为低成本即插式太阳能开辟发展路径

California has legalized plug-in or “balcony” solar, becoming the 10th U.S. state to do so in two years. The systems can cost $300 to $2,200, compared with more than $10,000 for average rooftop installations, but safety concerns including breaker masking and the lack of full UL Solutions certification remain barriers to wider adoption.加州已将即插式或“阳台式”太阳能合法化，成为两年内第十个采取这一措施的美国州。此类系统成本可低至300至2200美元，而普通屋顶太阳能安装成本可能超过1万美元；不过，断路器屏蔽等安全问题，以及尚无系统获得UL Solutions完整认证，仍阻碍其进一步普及。

Energy Tech 2 Oct 2026 2026年10月2日

300300

Plug-in solar cost即插式太阳能成本

1.5M150万

Registered systems in Germany德国登记系统数量

01The Story新闻事实

California has legalized plug-in or “balcony” solar, becoming the 10th U.S. state to do so in two years. The systems can cost $300 to $2,200, compared with more than $10,000 for average rooftop installations, but safety concerns including breaker masking and the lack of full UL Solutions certification remain barriers to wider adoption.加州已将即插式或“阳台式”太阳能合法化，成为两年内第十个采取这一措施的美国州。此类系统成本可低至300至2200美元，而普通屋顶太阳能安装成本可能超过1万美元；不过，断路器屏蔽等安全问题，以及尚无系统获得UL Solutions完整认证，仍阻碍其进一步普及。

  • California is the 10th U.S. state to legalize balcony solar in two years, and its market size effectively doubles the U.S. balcony-solar market.加州是两年内第十个将阳台式太阳能合法化的美国州，其市场规模实际上使美国阳台式太阳能市场扩大一倍。
  • Plug-in solar systems typically cost $300 to $2,200 and range from 400 to 1,200 watts, connecting to a standard GFCI outlet.即插式太阳能系统通常售价为300至2200美元，功率一般为400至1200瓦，并连接至标准漏电保护插座。
  • Traditional rooftop solar can cost more than $10,000 for the average homeowner because of installation, permitting and utility interconnection expenses.由于安装、许可和电网并网等费用，普通家庭安装传统屋顶太阳能的成本可能超过1万美元。
  • The Environmental Working Group reported that one 400-watt balcony system can cover about 14% of an average apartment’s electricity use and save about $250 annually.环境工作组报告称，一套400瓦的阳台式系统可覆盖普通公寓约14%的用电量，每年节省约250美元。
  • Germany had more than 700,000 plug-in solar systems by October 2024, while government registry data lists more than 1.5 million systems today.截至2024年10月，德国已安装超过70万套即插式太阳能系统；政府登记数据目前显示系统数量已超过150万套。

Plug-in solar could broaden access to distributed renewable energy in U.S. apartments and smaller properties, but its expansion depends on resolving safety and certification requirements.即插式太阳能可能扩大美国公寓和小型物业获得分布式可再生能源的机会，但其发展取决于安全和认证要求能否得到解决。

024 Dimensions维度分析

Comparison对比

Lower entry costs更低的进入成本

Plug-in systems avoid some of the high upfront costs associated with rooftop solar, including professional installation, permitting and utility interconnection. Their smaller format may make solar more accessible to renters and lower-income homeowners.即插式系统可避开屋顶太阳能中专业安装、许可和电网并网等部分高额前期费用。其小型化形态可能让租户和低收入房主更容易使用太阳能。

Plug-in solar cost即插式太阳能成本

Current estimate当前估算300 USD

Average homeowner普通房主10,000 USD

  • Plug-in systems cost $300 to $2,200, while average rooftop installations can exceed $10,000.即插式系统成本为300至2200美元，而普通屋顶太阳能安装成本可能超过1万美元。
  • A 400-watt system was reported to save about $250 annually for an average apartment.据报道，一套400瓦系统可为普通公寓每年节省约250美元。
Historical context历史脉络

Regulatory expansion监管范围扩大

California’s law expands the U.S. market and follows Utah’s 2025 framework, which removed an interconnection requirement for low-capacity panels certified by a national testing facility.加州立法扩大了美国市场，并延续了犹他州2025年的监管框架。后者取消了对低功率且经国家测试机构认证的太阳能板的并网要求。

  • Utah was the first state to enact a clear plug-in-solar framework in 2025.犹他州于2025年成为首个制定明确即插式太阳能框架的州。
  • California is the 10th state to legalize balcony solar in two years.加州是两年内第十个将阳台式太阳能合法化的州。
Contradiction矛盾之处

Safety and certification gap安全与认证缺口

Plug-in systems can create safety risks if solar power feeds a shared outlet and causes household wiring to exceed its rated threshold without tripping a breaker. Developers are working toward UL 3700 compliance, but no system had full UL Solutions certification as of May.如果太阳能电力流入共用插座，可能导致家庭线路电流超过额定安全阈值，却未触发断路器，从而形成安全风险。开发商正努力满足UL 3700标准，但截至5月尚无系统获得UL Solutions完整认证。

  • The article identifies breaker masking as a potential hazard when a solar kit feeds power into a shared wall outlet.文章指出，当太阳能设备向共用墙面插座输电时，可能出现“断路器屏蔽”这一安全隐患。
  • Massachusetts and Pennsylvania are considering frameworks that balance affordability with grid safety and hardware certification.马萨诸塞州和宾夕法尼亚州正考虑在消费者负担能力、电网安全和硬件认证之间取得平衡的监管框架。
Comparison对比

Evidence from Germany德国市场的先行经验

Germany demonstrates that plug-in solar can reach significant scale, although the article also cites a large number of reported unregistered systems. This suggests that adoption and oversight may develop at different speeds.德国表明，即插式太阳能能够达到较大规模，但文章同时引用了数量庞大的未登记系统。这表明市场采用速度与监管覆盖速度可能并不一致。

Registered systems in Germany德国登记系统数量

1.5M systems150万套

Today目前

Today目前1.5M systems

October 20242024年10月700,000 systems

  • Germany had surpassed 700,000 plug-in solar installations by October 2024.截至2024年10月，德国即插式太阳能安装量已超过70万套。
  • The article reports more than 4 million unregistered setups in Germany.文章称德国还有超过400万套未登记设备。

03Timeline时间线

  1. 2025 Utah became the first state to enact a clear framework for plug-in solar.犹他州成为首个制定明确即插式太阳能框架的州。
  2. 2024-10 Germany’s plug-in solar installations surpassed 700,000.德国即插式太阳能安装量超过70万套。

Key takeaway核心结论

California’s legalization lowers a major regulatory barrier for plug-in solar, but affordability gains will depend on safe designs, formal certification and workable utility rules.加州合法化降低了即插式太阳能面临的重要监管障碍，但其成本优势能否实现，取决于安全设计、正式认证和可执行的电网规则。

04What to Watch后续关注

  1. Whether plug-in solar systems achieve full UL Solutions certification under UL 3700.即插式太阳能系统能否按照UL 3700标准获得UL Solutions完整认证。
  2. How Massachusetts and Pennsylvania structure rules on affordability, grid safety and hardware certification.马萨诸塞州和宾夕法尼亚州将如何制定兼顾负担能力、电网安全和硬件认证的规则。
  3. Whether California’s law expands access among apartment renters and lower-income homeowners.加州法律是否会扩大公寓租户和低收入房主对太阳能的使用机会。

05Uncertainties不确定因素

  • The article does not specify the detailed implementation rules or rollout timeline for California’s law.文章未说明加州这项法律的具体实施规则或推出时间表。
  • The article identifies potential safety risks but does not provide data on actual incidents caused by plug-in solar systems.文章指出了潜在安全风险，但未提供由即插式太阳能系统实际引发事故的数据。
  • Reported figures for Germany include both registered systems and a separate estimate of unregistered setups, so the totals are not directly comparable.德国数据分别包括登记系统和未登记设备的估算值，因此这些总数不能直接比较。

06Sources信息来源

  1. From Roof to Balcony: Plug-In Solar May Lower Installation and Pricing Pain Points for U.S. Customers | Energy TechFrom Roof to Balcony: Plug-In Solar May Lower Installation and Pricing Pain Points for U.S. Customers | Energy Tech Energy Tech · 2026-10-02

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