Electrical question

[mainshiptom]

Not sure if a bit complex but someone here will know the answer?

I have a separate battery and charger for my Gennie (Fischer panda which does not charge the battery on its own)

My battery charger works fine on shore power so Gennie starts first time, but long use of gennie with same battery charger just now link to gennie empties out battery fast,

what is going on?

Once back on shore power even for ten minutes gennie will start?

 

[paulajayne]

Petrol gennie? If so it requires power to run engine - coils and spark plugs.
This will run the battery down.

When gennie running power battery charger from it. Which will keep battery charged.

Seems odd that it does not charge the start battery,

Which model gennie.

 

[BruceK]

If I was to take a punt the first thing I'd look at is the charger reliant on pure sinewave and frequency and does your genny conform, and if so perhaps out of tune?

 

[halcyon]

Not sure if a bit complex but someone here will know the answer?

I have a separate battery and charger for my Gennie (Fischer panda which does not charge the battery on its own)

My battery charger works fine on shore power so Gennie starts first time, but long use of gennie with same battery charger just now link to gennie empties out battery fast,

what is going on?

Once back on shore power even for ten minutes gennie will start?

Look at battery charging system for the gennie.

We had mains battery charger problems at Sealine with some Fischer units back in the 90's. The small ( Panda ?) unit's output, would not run the charger due to the way it generated the mains. Larger units ( may be other make/makes) we had problems as the gennie battery was charged vis a tapping from the 240 AC generating system when it was running. We made a unit for them that switched both pos and neg 12 v battery leads to the service 12v DC for charging when gennie was running or mains charger on.

Brian

 

[mainshiptom]

Look at battery charging system for the gennie.

We had mains battery charger problems at Sealine with some Fischer units back in the 90's. The small ( Panda ?) unit's output, would not run the charger due to the way it generated the mains. Larger units ( may be other make/makes) we had problems as the gennie battery was charged vis a tapping from the 240 AC generating system when it was running. We made a unit for them that switched both pos and neg 12 v battery leads to the service 12v DC for charging when gennie was running or mains charger on.

Brian

That would explain it the Gennie only produces 200 volt which is ok for old fashion main battery charger (not a modern one) so might link up to them.

 

[Croftie]

I have a Fischer Panda 6 and just tested it. Gen battery normally charged via Victron 3 outlet (Starter/Dom/Gen)
Switched charger off and took surface charge off gen batt, 12.9v. started gen and the gen battery went to 14.2 so genny is self charging its battery. Switched on the Victron and battery voltage went up slightly. Voltage on the AC panel shows the same for either shore or genny power.

 

[vas]

That would explain it the Gennie only produces 200 volt which is ok for old fashion main battery charger (not a modern one) so might link up to them.

not familiar with the FP geny, but cannt you tune the volts up a bit? Normally done at the governor which is kept at a certain position against it's spring. Undo the nut a bit and up the rpm a bit till you measure 230V then hopefully the charger will work ;-)
V

 

[Bran]

I have a Fisher Panda 4.5, output was slightly low under load, maybe 210-220 v, replaced the 3 capacitors, now OK, 230, 235v, made a big difference, runs a Victron IP43 50A charger no problem.