I bought a solar charge controller that was advertised as being able to accept voltages 12v-40v.
That was nice because my solar panel is 37 volts.
But when I opened it the docs inside said it was good for 12v-20v. I complained and eventually the internationally known E auction site gave my my $70 back, but I had to pay $30 for the return postage.
I sent it back to China.
Apparently they didnt bother to collect it or they dont really live at their stated address.
So far its travelled 20,000km.
The world is an amazing place.
And a completely loony one.
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