Three decades of
turning current into
dependable power.
ZHEJIANG JUNJ ELECTRIC designs and builds power inverters, solar charge controllers, portable power stations and custom PCB assemblies — 400,000 units a year, every one of them load-tested before it leaves the floor.
What 33 years actually
adds up to.
Six numbers buyers usually ask for in the first email. No brochure language — these are audited figures from the Yuhuan plant.
Six gates between a bare
PCB and a sealed carton.
Every JUNJ unit follows the same physical route. Hover a gate to see where it happens — this is the part most suppliers keep off their website.
The certificate is the
easy part. The gates aren't.
Five control points on every production order.
From component incoming inspection to the pre-shipment audit, each gate has a named owner and a record that ships with the order.
- 01 Incoming component inspection IQC · 100% of power devices
- 02 First-article approval FAI before mass run
- 03 In-process patrol IPQC · every 2 h
- 04 100% load & burn-in 4 h at rated output
- 05 Pre-shipment audit OQC · AQL 0.65
10,000 m², and you're
welcome to see all of it.
Buyers fly in for a floor audit every month. Here is the walk they get — no staged rooms, no restricted zones.
From a PCB workshop to a
three-system certified plant.
ZHEJIANG JUNJ ELECTRIC starts as a PCB and charger workshop in Yuhuan.
Quality system formalised; first export orders to Southeast Asia.
Pure sine wave platform launched; patent portfolio passes 50 filings.
Portable power stations and LiFePO₄ storage enter the catalogue.
10,000 m², 7 lines, 400,000+ units a year across 6 product families.
Book a factory audit,
or send us a spec.
Tell us the waveform, the wattage and the market you sell into. You'll get a costed proposal and a line-allocation date — usually within two working days.