Power Dynamics? How old is this thing? Or maybe Progressive dynamics?
17 volts is way too high. Seems odd as very few fail high. Do you have a second meter to verify? Or if the battery is low in your voltmeter they can read high. Otherwise I would replace with Progressive Dynamics or IOTA only as you mention off-grid camping.
Inverter has AC connection in and out? Just no output? You can replace with J-box and a couple wire nuts if you prefer.
I do not recommend WFCO. Get a PD or IOTA. New converter will be built into the new panel.
http://www.bestconverter.com/PD4045-45-Amp-Inteli-Power-Mighty-Mini-Power-Center