On Wed, 5 Feb 2025 at 18:24, Roger Munford via Hampshire <hampshire@mailman.lug.org.uk> wrote: > > Thanks everybody for your kind and useful responses. > > The project involves two solar installations which are close to each > other and as generators they are separate. However it appears that for > monitoring purposes, (equipment manufactures advice) it would be better > to have the two systems integrated hence the last minute call for a > wireless link. It could have been incorporated into the system whilst it > was being built but that didn't happen. I have passed on the excellent > suggestion of a fibre link. > > In the distant past I did install a couple of wireless bridges across > farmyards using normal domestic equipment costing in the order of £50 > plus antennae and they seemed to be OK. However for this job, I thought > that I would try and find something industrial standard . It seems that > the sort of equipment found on Amazon although cheap appears to be > adequate although I think a well made, rugged system is required here. > > A few years a go was lucky enough to be involved in a project in Africa > and we were advised to use "Teltonika" equipment for comms and it looked > the part, aluminium case, rail mounted. What I meant by robust. It has > been working for 3 years without failing. > > My friend has ordered something Chinese from Amazon just to get going > but chances are he will come back to it later. >
Hi, Considering the Wifi option. An off the shelf wifi equipment can probably reach 100M line-of-sight without needing any special antenna. 180M might need a more directional antenna. There are also OFCOM license considerations to consider. Limit's TX power outdoors etc. if you don't want to need a license. Another aspect of RF point-to-point links is that RF does not travel in a single straight line like a laser does. You need to pay attention to something called the "Frensel Zone" Here is a youtube video to explain it: https://www.youtube.com/watch?v=b7ey2upDhRw So, in summary, I don't think you need to go with anything too expensive. You could also maybe use Lora or similar to link the two solar arrays, that will be cheaper. Kind Regards James -- Please post to: Hampshire@mailman.lug.org.uk Manage subscription: https://mailman.lug.org.uk/mailman/listinfo/hampshire LUG website: http://www.hantslug.org.uk --------------------------------------------------------------
