FWIW - a solar panel does not usually need a "dump load" unlike a wind
turbine which needs a load to stop it running amok, unless it is designed
to feather or tilot off wind or in some way reduce the power input.

A solar panel or panels may in some cases need a dumpl load if Voc exceeds
eg the inverter or controller input spec, but this is installation specific
and most decent controllers would have enough Vin headroom to allow them to
accept Voc from panels they are intended to work with. 250 W panels tend to
be 30 Vmp and 300W panels tend to be 36V Vmp and I have ssen inverters
which will work only with strings of one or the other but not both
interchangeably.



            Russell
--=20
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