About us

RUN CHENG ELECTRIC is operated by RUNCHENG ELECTRIC APPLIANCE LIMITED (潤成電器有限公司), a company incorporated in Hong Kong (BR No. 79627259). We build practical digital products: bilingual engineering calculators for electric-vehicle powertrain teams, compliance workbooks for exporters selling into the EU, and printable planners for families.

Our founder worked in EV motor R&D from 2011 to 2016 and, since 2016, has worked on OEM powertrain system selection, development, validation and homologation. Our products are prepared with AI assistance from public sources; please verify before use.

How we work

Digital products only, delivered by instant download.
Spreadsheet formulas are checked by automated independent recalculation; this is not a human engineering review.
We use AI tools for drafting and design and say so on each product (AI disclosure).
We do not give legal, medical or veterinary advice.

Company details

Legal name: RUNCHENG ELECTRIC APPLIANCE LIMITED (潤成電器有限公司)
Company / BR number: BR No. 79627259
Registered address: Portion 1 of Unit No. 721A, 7/F, Star House, No. 3 Salisbury Road, Tsim Sha Tsui, Kowloon, Hong Kong (香港九龍尖沙咀梳士巴利道3號星光行7樓721A室)
Email: service@runchengelectric.com

关于我们

RUN CHENG ELECTRIC 由香港注册公司 RUNCHENG ELECTRIC APPLIANCE LIMITED (潤成電器有限公司) 运营,提供中英双语数字产品:电动汽车动力总成工程计算表、面向出口欧盟企业的合规工作簿、家庭可打印模板。创始人 2011–2016 年从事电动汽车电机研发,2016 年起从事主机厂动力总成系统选型、开发、验证与认证。产品基于公开资料、由 AI 辅助制作,使用前请自行核实。所有产品均为数字下载,使用 AI 辅助制作并如实标注,不提供法律、医疗或兽医建议。