We have power up ! Some pics from the initial switch on. (The plumbing is not ready for the immersion so air dumps in use now). The system was ‘right on the money’ as far as the calculations go. There was over 1 bar reading on the pressure gauge, even when running with four nozzles. We are using only about a third of the water flowing down the stream right now, (there has been quite a lot of rain, but this is more or less the normal winter level). We see around 7 amps on the meter when dumping is in progress, at about 60 volts, so around 420 watts. I haven’t read the the amps accurately, going on the analogue meter you sent.
I am sure we could get a lot more from the system if necessary, but for now it will be plenty until Michael works out using some of the 240 volts with washing machine, fridge, and water heating.
The only thing we didn’t like was the fact the Turgo is quite noisy. Michael’s house is exceptionally quiet, miles from a road, and minimal ambient noise from the inhabitants. We could hear it from the house, even though it is at least 100m away. Michael was not really bothered by it, but I suspect he will want to enclose it with something to damp the sound, longer term. He plans a roof over it anyway. Any ideas on the best solutions ? I suggested some sound attenuating foam.
It was very satisfying, and have to repeat our earlier thanks for all your advice and input.