inverter/charger + generator = SMOKE!
Smoke was the result of my Xantrex HF1000 inverter/charger being connected with 'shore power' from my P3-3000 generator in my off grid cottage. It detected the 110Vac input, switched to 'shore power', and charged the batteries for a few minutes (already at 12.6 anyway), then disconnected from shore power, produced white smoke from the bottom of the unit and went back to inverter mode. It still works as an inverter with my pair of T-105's, but, doesn't detect 'shore power' anymore and now has an oily burnt electrical odor to it.
I'm normally pretty successful at these types of projects, but, clearly I'm lost in the fog(smoke) on this one.
Through the clouds of smoke I suspect either a manufacturing defect or a grounding problem.
Anyone else have similar experience?
Here's the details I'd ask about if I were trying to answer this question:
No significant loads were running at the time, polarity was checked, double checked, and after the fact once the smoke cleared re-checked.
The unit was brand new, this was its first use.
On the 'shore power' input side I'm feeding the charger/inverter directly from one of the 15amp 110Vac outputs on the generator using a heavy 3-prong extension (can't get the polarity wrong). I think that the generator neutral is bonded to the frame, but am not certain. It doesn't have its own grounding rod or dedicated grounding connection of any sort.
The 110Vac output side the inverter is connected to the A/C distribution panel which has neutral connected to ground in the panel and takes its ground from whatever feeds it. In this case it'll be taking ground from the ground connection from the inverter. The panel isn't directly connected to building grounding rod.
The ground terminal on the HF1000 chassis is connected to the buildings grounding rod.
The HF1000 manual indicates that it utilizes the shore power ground when running on shore power and the chassis ground when running as an inverter so it would be using ground from the generator when on shore power.
Before installing the HF1000 the generator was frequently used to feed the distribution panel directly using the same heavy 3-prong extension from the same 15amp 110Vac output on the generator as used to feed the inverter/charger.
Lost in the fog (er um smoke).
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