question

tt-empowered avatar image
tt-empowered asked

Overload warnings

Hi Blue power community.
I'm noticing a lot of inconsistencies across my installations in terms of "Overload Warnings". For example, a 5kVA Multiplus installation would register this warning sometimes at 3.8 kW, and sometimes at 7.2kW. I maintain a simple configuration of critical loads on AC1 (lights, tv), and heavy loads on AC2 (geyser). And all these warning occur other the same set of conditions, with Grid PV and battery available.

My question here is should overload warnings occur at when reaching nominal power (5kW for a 5kVA inverter), or at Peak power ( 10kW for a 5kVA inverter)?. And besides the datasheet, is there anywhere the parameters that drive this warning are set?

Thanks in advance.

MultiPlus Quattro Inverter Charger
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1 Answer
Guy Stewart (Victron Community Manager) avatar image
Guy Stewart (Victron Community Manager) answered ·

Hi @TT_empowered,

Good news on this issue - the latest VE.Bus firmware version 481 - includes fixes for spurious overloads.

Fixes include:

  • Prevents permanent lock on ripple error due to overload.
  • Improvement of acceptance of grid in “floating phase” systems icw generators.
  • Solved: Spurious switch off due to overload.

Available on VicProf and the firmware dropbox now for manual update; and will be included in VictronConnect a while from now.

Any and all strange issues related to overload should FIRST AND FOREMOST update to this firmware version, and then report if they are still occurring.

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harold avatar image harold commented ·

Can you let us know when we can update via VictronConnect or VE Config?

Thanks

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tt-empowered avatar image tt-empowered commented ·

Hi @Guy Stewart (Victron Community Manager).
Thanks you for this.

Will do the update and report after a week of monitoring. I was currently sitting at firmware 476 with my installations.

Many thanks.

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spicedreams avatar image spicedreams commented ·

@Guy Stewart (Victron Community Manager),

Guy I have been keen to get MultiPlus II firmware v481 on the assumption that the overload warnings I have been getting (which don't result in the system turning off) are 'spurious' as you mention above.

But actually I don't know whether they are really a symptom of something actually wrong that needs fixing.

All I know is that I get them <8 times a day, they cure themselves after ~20 seconds and they are sometimes (but not 1:1) associated with a small freezer compressor starting (rated at 90W, 0.73 kWh/day).

Is there any way to tell a spurious overload warning, (as resolved by v481?) from an actual problem?

Is there any way to get more detail about the overload that is being warned about?

Thanks

Graham


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