Insignia Shower/Bath Cabin - Can usual electrics with economy7 work?

Definitely i suggestingIn any case, I recommend a 200 liter water tank and more strong power supply. If it is not far from the fuse, I would also recommend a separate fuse.We can help you with fully fitting .Artsystem Mr Rene

Water pressure - if you have a combi boiler, should be OK, but if feeding from a hot water tank, you will need a powerful pump to get the required water pressure (2.5 bar or better). A simple water pressure gauge can be used to test pressure of cold water feed. If too high, you may need a pressure-reducing valve (straight-forward to install) - or use pump from cold water tank. Electrics this is 2.8KW, which isn't particularly powerful, but recommendation is to use a separate breaker in the consumer unit for it. As it is being installed in a bathroom, a qualified electrician with Part P certificate is needed.

The product comes with British BS 1363 plug 13AMP but the manual states te product is rated @ 2.8KW. I am not sure if the fuse will last long. From electrician point of view you do not need new wiring or cable or MCB... 32AMp one will be sufficient. Some may suggest using a separate circuit which is ideal but if the product comes with a British BS 1363 plugs then well you are entitle to plug it in any socket. Plumbing wise I would recommend using a pressure pump.In may opinion standard water pressure is around 2bar if lucky 2.3 which is too close to 2.5 bar which is on the lowest limit. (better be on the safe side). If it is your house do whatever you want...you do not need an electrician.Good luck