Cited sources
Last verified 2026-09-25.
- Gokin describes this as a module built on its own N-type GBC back contact cells, with 108 cells behind a single sheet of glass in an all-black finish.
- The maker publishes a datasheet and product page but states no launch date, price or sales market, and the datasheet itself carries no date.
- It cannot be scored yet: the datasheet gives only headline warranty periods (25 years product, 30 years linear power) without the warranty terms, and shows certification marks but no certificate numbers or scope.
- The 24.5% figure applies only to the 500 W top bin; the 480 W model is rated at 23.5% efficiency.
- This record covers only the single glass GK-3-54HGFb and is not joined to Gokin's sibling models such as GK-3-54HGFDb or GK-3-54HGDb, which are separate products.
- Legal manufacturer as printed: Gokin Solar Co., Ltd.
- Gokin GK-3-54HGFb 480-500W datasheet (GK-3-54HGFb-AB-SG-F1 EN)https://www.gokinsolar.com/upload/goods/GK-3-54HGFb-AB-SG-F1%20EN-0909.pdf
The maker's datasheet prints the product name, the five model codes, GBC cell type, 108 cells, single 3.2 mm glass, 480 to 500 W ratings with 23.5 to 24.5% module efficiency, headline product and linear power warranty years, certification marks and the legal entity.
- Gokin BC Series product pagehttps://www.gokinsolar.com/en/GOKIN-BC-Series
The maker's product page lists GK-3-54HGFb in its BC Series with an N-Type GBC cell, 500 W maximum and 24.5% maximum efficiency, alongside separate sibling models.
- Gokin news: GBC modules in winterhttps://www.gokinsolar.com/en/news/339
The maker states that Gokin GBC uses back-contact cell technology with no front-side gridlines.