Hello, i have a Multiplus 2 GX, 40kWh battery, and 16kWp solar on ac, to make an ESS at my house. Programmed to discharge battery and keep grid current <0. Works fine, but when batteries are full and grid injection goes above 7500W, then the Multiplus fan turns ON and quickly meets its max (for aro…

Witch model Muliplus 2 you have and how are the 16 kWp solar connected to the Multiplus

It is a Multiplus-II 48/3000. PV is ac connected (ie directly connected to the grid, not the the Multiplus) it seems similar to what observed in this post (which I have not see before): bug-report-fan-runs-at-max-speed-on-mp2gx-even-though-not-charging

There was a fan issue VE.Bus firmware v507 & v508 - fix for fan noise issues in MP-II & Quattro-II...

[image] pierre: Possibly the grid voltage reaches around 250/253Volts You can check the voltage on your vrm portal ( https://vrm.victronenergy.com/ ) [image]

Thanks. I could not check if this is the case (of fan noise issue solved by rev07) for my device: VE.Bus System Product MultiPlus-II 48/3000/35-32 Firmware version 2699502 Product id 2699 VE.Bus connection VE.Bus Hardware configuration Single unit Serial numbers HQ2315DRGUC Phase 1 Mas…

I liked vrm much, but 3 weeks ago, I change router (using same wifi SSid and pass), but now the inverter fails to connect, even using the router that was in place. BT connection allows me to see, select my wifi, but it says ‘connection impossible’ whatever reboot I did. Possibly I assigned a fixed I…

Yes, unrelated issues, but this makes it more difficult for me to try upgrade firmware and solve issue #1.

Can you connect the Muliplus II GX with a Ethernet cable

[image] pierre: select my wifi, but it says ‘connection impossible’ Note: Wifi is case sensitive

Multiplus 2 gx fan turns on at high grid measured injected power (but no MPII activity)

Topic		Replies	Views	Activity
Bug report: fan runs at max speed on MP2GX even though not charging DIY beginner , multiplus_2_gx , bug_report	11	119	13 April 2026
Multiplus II Restarts on a Hot Day DIY beginner , pv_inverter , vrm , fronius , victron_community	5	234	1 October 2024
Multiplus-II 48/5000 inverter stops at ~ 3x3450 W and does not go above DIY diy , ess , dess , multiplus-ii , 3-phase , cerbo_gx	13	404	20 April 2026
Multiplus II disconnects often from grid due to overvoltages Q&A and troubleshooting ess , feed_in , multiplus-ii , fronius	6	712	27 November 2025
Multiplus \| Maximum power without engaging the fan DIY beginner , multiplus , domestic , multiplus_2_gx , multiplus-ii	3	769	6 November 2024

Bug report: fan runs at max speed on MP2GX even though not charging

DIY

beginner , multiplus_2_gx , bug_report

11

119

13 April 2026

Multiplus II Restarts on a Hot Day

DIY

beginner , pv_inverter , vrm , fronius , victron_community

5

234

1 October 2024

Multiplus-II 48/5000 inverter stops at ~ 3x3450 W and does not go above

DIY

diy , ess , dess , multiplus-ii , 3-phase , cerbo_gx

13

404

20 April 2026

Multiplus II disconnects often from grid due to overvoltages

Q&A and troubleshooting

ess , feed_in , multiplus-ii , fronius

6

712

27 November 2025

Multiplus | Maximum power without engaging the fan

DIY

beginner , multiplus , domestic , multiplus_2_gx , multiplus-ii

3

769

6 November 2024

Multiplus 2 gx fan turns on at high grid measured injected power (but no MPII activity)

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