Mischief Managed
Guru
- Joined
- Oct 24, 2018
- Messages
- 715
- Location
- USA
- Vessel Name
- Mischief Managed II
- Vessel Make
- 1992 Tollycraft 44 CPMY
My boat suddenly has a strange issue. Both my Inverter (Xantrex SW3012) and my battery charger (Promariner 1250P) will not charge my batteries on 1992 Cummins Onan 8kw diesel genset power.
Every other 120V system on the boat works fine on genset power and both chargers work perfectly on shore power. The genset puts out a steady 118.3VAC (plus or minus .1V measured with a DMM using MIN and MAX function) at 61.25 Hz at the furthest outlet from the generator on the boat. An analog volt meter does not display any voltage fluctuations. The genset is running smoothly and works perfectly under heavy load (water heater and all three AC units running). I have not looked at the waveform yet with an oscilloscope, but that's the next step.
Any thoughts or ideas would be appreciated.
I called Xantrex tech support and they assured me that the inverter only looks at voltage, waveform, and frequency to qualify AC input power. It does not care about bonding, floating grounds, stray current, or any common issues like that one may find on a boat.
My gut says the genset os putting out a funky waveform that none of my other 120V devices care about or monitor. The genset has approximately 1240 hours.
Every other 120V system on the boat works fine on genset power and both chargers work perfectly on shore power. The genset puts out a steady 118.3VAC (plus or minus .1V measured with a DMM using MIN and MAX function) at 61.25 Hz at the furthest outlet from the generator on the boat. An analog volt meter does not display any voltage fluctuations. The genset is running smoothly and works perfectly under heavy load (water heater and all three AC units running). I have not looked at the waveform yet with an oscilloscope, but that's the next step.
Any thoughts or ideas would be appreciated.
I called Xantrex tech support and they assured me that the inverter only looks at voltage, waveform, and frequency to qualify AC input power. It does not care about bonding, floating grounds, stray current, or any common issues like that one may find on a boat.
My gut says the genset os putting out a funky waveform that none of my other 120V devices care about or monitor. The genset has approximately 1240 hours.
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