Hi binky.. I made the jump to solar pv about a year back now and must be pushing around a 40 - 60 installs. From 2kw systems to 50kw systems. I subcontract to a mcs company in Scotland and handle most of there installs. I wouldn't say it was easy step to take with my small company but looking back I would still have done it. I handle the electrical install and we get a roofing company to install the pv panels. We stick mostly with sma inverters and I find these to be the best. With the sunnybeam display ( optional add on) and sunny express for Bluetooth enabled computers the interface is endless, with detailed charts for kwh produced per day, week ,month , year I find this hard to beat. I have worked with fronius , power one and del ako inverters but to me I think the sma is the best. As far as tools for start up are concerned it's a bit of a minefield. We currently use on a daily basis mc3 crimper, mc3 insertion tool( sanyo panels) mc4 crimper, mc4 spanners ( sharp panels ) fluke dc current meter, fluke installation tester and fluke multimeter. ( costly). Plus initial start up cost for training on niciec course. But on the other hand I am now carrying out at least four installs a week. I enjoy the work and there is some feel good factor when you walk away from the job every night.. I could keep typing but I will open the floor to comments .. Ps first post.. Go easy ..