It does sound like the PC680 shorted internally.
How much voltage does the Iota put out?
If it's below 14V then it shouldn't normally cause a meltdown.
Al
The problem: Discovered the 12volt house battery melting down after two
hours of the dc-dc being engaged (vehicle on charge) The battery was
cooking
- spewing suplfuric acid which had condensed across the underside of the
bonnet. Luckily no fire.
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