We are a heritage railway with a restaurant carriage equipped with electric cooking equipment (refrigerators, microwave, cooker and water heaters) which causes intermittent loads on the Victron as thermostats are cutting in-and-out. The load can fluctuate from a couple of hundred watts to over 8 kW …

Good afternoon, It might be easier as you think as such little generators cannot handle well starting heavy loads as they do not have a sufficient mechanical mass (flywheel) to keep it rotating, so for a moment they drop in frequency and voltage and that is not ideal with an inverter. Try first to…

Thanks Jeroen We have tried lowering the demand current from the generator to about 12Amps and found it still not performing reliably (then one questions why have a 5.5kW generator only operating at less than 50%!). Maybe our next exercise is to drop it considerably lower - 25% maybe? We won’t be a…

Good evening, As said before, little gens sometimes are not so suited with an inverter due to not having sufficient flywheel mass, but indeed, try it on a lower value. These gens do not like to start things but run quite ok when they have a constant load like charging a battery or running a cement…

Have you followed the generator FAQ? MultiPlus Generator FAQ [Victron Energy]

Thank you Nick I shall have a good look at these FAQs in the morning (23:10 at the moment!) - there may be some nuggets to pursue there.

Make sure you have Dynamic Current Limiter turned on. This is supposed to ramp AC input current up and down slowly which is the way you are wanting the system to behave. In testing a much smaller system, step loads do in fact ramp the generator contribution slowly (over a few seconds). One thing I …

I think you might be thinking incorrectly about the UPS function: https://www.victronenergy.com/media/pg/Quattro_(AUS)/en/configuration.html and how the inputs and outputs on the Quattro work: https://www.victronenergy.com/media/pg/Quattro_(AUS)/en/appendix.html#UUID-58f73bc6-8036-6bb8-9d3b-69f2e…

Thank you, Kevin The load on the generator does step up, probably 1.5 kW per second (the refresh rate on the Cerbo), so we’re confident this is working as expected. It’s that looking at the load, one second it can be 4kW and in the next view, it might have dropped to 1.5kW. The generator, seeing th…

Thank you, Dean We tried empirically working the system with the UPS switched OFF. The result was the load, including the main (external) contactor connected to output A/C-1, would drop out when the generator was trying to keep up. This was resolved when UPS is left ON, so it seems we have to live …

Was ist wenn Du den Boost Faktor mit 1,7 betreibst?

Quattro and generator stability problem when output intermittently loaded

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Richard-B-GWSR (Richard Budd) 14 September 2026 07:32 12

Thanks, Karl-Heinz

I’ll give it a try

Separating charging and inverting functions for Quattro

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Quattro and generator stability problem when output intermittently loaded

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