A load resistance is necessary
Yes, appropriate load resistance is mandatory.
Without it, the Windy Boy Protection Box loses its capacity to protect the Windy Boy from overvoltage.
,Naturally, our product portfolio for Windy Boys includes ideally adapted load resistances.
See the criteria for the load resistance to be connected in the technical information “Windy Boy Protection Box – Overvoltage protection and rectifiers for small wind turbine systems”, and the Windy Boy Protection Box 400/500/600 installation manual. You can find these documents on our website at http://www.sma.de/produkte/windenergie-wechselrichter/windy-boy-protection-box.html