Yamaha ef2000is inverter generators with Twin Tech cables

I've read some related posts on this subject. Evidently CSA will not approve the parallel operation because the ground and neutral are not bonded. You can check but I believe that 2K generator sets sold in Canada do not have the parallel ports, where units sold in the US do. Some folks bought aftermarket kits and report some success, but I'd do a lot of research if I was planning on parallel operation of 2K generators in Canada.