IMHO, the take away here is, if you are going to buy drums of solar cable , make sure you test a sample before parting with your cash, If a decent length is available, say 100m, 500m the a 4 point resistance measurement is what industry does (but you need a quality meter with a precalibration made beforehand)
Got a cable from a solarcable brand K**. Had 80 strands with 80x0.28mm, which comes out at 4.92mm².
I checked on other cables i have bought (only one is a solar cable)(Germany):
4 out of 5 were wrong crosssections, by about 20%.
EB & Ale are full of fake stuff why would you think that cable is any different.
when it cums to things that are going to burn down your house just bye brand name components from real suppliers.
specs from 6mm sold in Aus
Inner insulation XLPE
Sheath XLPO
1500 V DC
78 x Ø 0.30 tinned copper
Conductor resistance @20c / km 3.39 Ω
Weight 78KG Kilometer
Rated current 70A
The fake stuff doesent even have a UV stable outer sheath, not that sunlight is a problem in the UK