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Hi Tim, that may be difficult.
I tried to charge my Insights battery on the go, but it detects abnormal (> 17 Ampere) current flow and throws a code disabling the hybrid system.
Your Volvo might act in the same way, or not; at least Prii are more forgiving (apparently).
That said, I too like to know what high-voltage DC-DC converters are available. I'd think a DC to AC converter and then a transformer and high-voltage rectifier bridge is the 'easy' way to do it.
One other way to extend your range is to have a big extra LiFePO4 12V battery and use that to power all the 12V stuff including the heater.
That may be enough to extend your range to 60 km.
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2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
  lifetime FE over 0.2 Gigameter or 0.13 Megamile.
For confirmation go to people just like you.
For education go to people unlike yourself.
Last edited by RedDevil; 01-09-2018 at 04:35 AM..
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