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Well all fixed now.'

Just goes to show you cant trust new parts to be ok.

Fitted a second new AVR today & the voltage is rock steady.

I, like others above, would expect the signal to the AVR is dead - hence the AVR is trying to energise the rotor to bump up the sensed voltage. Always assuming your meter is reading correctly when checking the grid supply. Without full details of the generator, people are just guessing - just like ...

Not for your current situation Justme but general information about matching generators to off grid setups. If you have a dodgy generator of any type or voltage you can put a fullwave rectifier on the output to give you DC voltage. It could be a three phase generator with a 3 phase rectifier or a 1...

Nor would I be putting 333v into a 240v device. Wky not ? If you dislike the idea of reducing revs or applying a load then i guess you wont find out https://www.amazon.com/Clover-Stainless-Electric-Immersion-Element/dp/B09XB13N75 over voltage is a sure fire way to kill devices. Also it still wont h...

My suspicion is that the rotor has a shorted turn, perhaps not really a turn, as such, but part of the winding is shorted so there is a self-energising closed loop. If this happens the residual magnetism will cause the shorted part of the rotor winding to self-excite, and the AVR won't have any eff...

Need a bit more info mate, is it brushed or brushless, if brushed how many sliprings 2 or 3? Brushless. Any circuit diagrams available? I would be trying to measure the excitation coil voltage, sounds like it my be permanently at max, it should obviously change with the load. Check the excitation l...

Put a load on it, like an electric heater 2-3kw and then measure it. It needs to be stable off load. Or the inverter chargers will never accept the input. Well as you say 333 Volt , thats quite a lot , and for sure that overvoltage is a common well known problem as no off grid inverter /charger wil...

rogeriko wrote: ↑Sun Jul 31, 2022 9:30 pm Put a load on it, like an electric heater 2-3kw and then measure it.

It needs to be stable off load.

Or the inverter chargers will never accept the input.

I am a mere Mechanical Engineer, but from my distant memory I have to ask A=are you measuring RMS voltage or Peak voltage. RMS x √2 = Peak. So, if you are measuring 230 V and your meter is set to Peak then it will indicate 325V. 240V would indicate 339V. Good point, many cheap multimeters have a pe...

Westie wrote: ↑Sun Jul 31, 2022 7:45 pm
Need a bit more info mate, is it brushed or brushless, if brushed how many sliprings 2 or 3?

Brushless.