Multiplus II 12/3000 regularly generating L1 OVERLOAD Alarms at 1500W or less

[boatcoder (Mark D Jones)]

Multiplus II AC Output Power [276]

This thing has been throwing off these alarms since I put it in about a year ago. We have induction cooking (probably the root cause) we also have a refrigerator, and a washing machine. Fans, TVs, computers etc… (Everything but a Dishwasher)

If this is a ripple alarm, why isn’t it recorded as one, why an “overload L1”? Is there some setting to say, don’t lie to me about overload L1? Or don’t warn me about an overload until at least 2750W? It has never shut off like some people have seen, but it really likes to whine.

I’ve got 16kwh of Lithium on the DC side and 2 sets of 4/0 AWG Tinned copper cables going to the unit with a length of no more than 12’ each.

DC Input voltage from the main inverter.

And the DC Voltage graph. all of these are for the last 7 days.

If there is a legit overload on L1 seems like it would make sense to include the value of the wattage that triggered the overload warning but that’s not in the emails. There is a timestamp for when it happens but no actual values for what caused the alarm

[M_Lange (Matthias Lange - DE)]

Zoom closer in at the spikes.
If the selected time frame is to big the shown graphs are getting inaccurate.

The current spikes in the DC graph are going to 240A → around 3000W.

Induction cooktops can be a nasty load for an inverter due to the fast pulsing.
What rated power does the induction cooktop have?

[Kalahari-off-grid]

I agree with @M_Lange , if you look at the Voltage and Current graph for the battery the short term huge Voltage drops and probably over 200A current being drawn, can’t make it out properly, sorry, pretty much indicate that the inverter is not being dishonest and you are hitting 3000VA here and there… changing the resolution down to 5 minutes or even 1 minute for the graph, will probably show you the truth…