r/Victron | reddlx

Multiplus fan responding to house load not inverter load

Had a Multiplus ii GX for around 6 months, not doing anything exciting just as inverter/charger to a 16kWh Fogstar battery for home ESS.

the fan noise was unbelievable, but I thought maybe it gets hot so that’s how it is.

to mitigate this, I saw a common modification was to add 2x 120mm fans on 3-D printed ducts underneath which just run at full pelt.

once I did this, I obviously paid a lot more attention to the fan and it made no difference at all

I realised the internal fan is purely running based on the load into the house not load on the inverter.

for example at night when all the inverter is doing is charging the ESS battery at 2 kW, when a Car charger kicks in running directly from the grid the multi plus fan goes to full speed.

Its a new unit and on firmware v508.

has anyone else come across his behaviour? has anyone found a solution?

it’s driving me mad, turn on the kettle and all I can hear is the multi plus fan.

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u/captainyossariann — 4 days ago

▲ 3 r/Victron

First solar setup, what should I watch out for?

Hey everyone! I'm putting together my first solar system and could use some advice. Here's what I'm planning:
Victron MultiPlus 24/2000 (the original, not the II)
About 1 kWp of panels
Victron SmartSolar MPPT 150/35
24V 100Ah battery bank
I want solar to be the priority, with the grid as backup when there's not enough sun. Any tips, or mistakes I should avoid? Thanks in advance!

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u/0Rex1 — 4 days ago

▲ 8 r/Victron

MPPT RS Tracker Limit?

The 450/200 can do 11.5kW, but only 4kW at 16A per tracker, which would only be 6x ~500W, 45V panels, at which point you can buy almost 3x as much MPPT capacity with three MPPT 250/85 (4.9kW), and run a 5-2 series-parallel configuration per unit.

Is there something I'm misunderstanding? Just seems like on modern 500W+ panels it's hard to fully utilize an MPPT RS, especially at higher voltages.

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u/hypergoose94 — 6 days ago

▲ 3 r/Victron

Hoher Standby Verbrauch? RS Multi 6000

Habe jetzt schon eine Weile eine Anlage mit 3x rs multi 6000 im drei phasen betrieb mit 4x pytes Akku und ekrano gx.

Der Selbstverbrauch ist immer so bei 90-100W. Hatte anhand der Angaben im Handbuch eigentlich mit weniger gerechnet. So mit 60-70W.

Wie sind da so eure Erfahrungen?

u/Ambitious_Mammoth482 — 6 days ago

▲ 19 r/Victron

I asked AI to design and buy a solar power system for me

And it worked.

- 3x Aiko Neostar 3P54 wired in serial at 123Voc
- 4x 220Ah 12V batteries wired as 2S2P for 440Ah at 24V
- SmartSolar MPPT 150/85-Tr
- MultiPlus-II 24/3000
- Ekrano GX
- Orion-Tr Smart 24/12-30
- SmartShunt IP65 500 A
- 2x Victron battery balancer

This is for a small village on a remote island halfway between Fiji and Tonga. They wanted to run Starlink with a Unifi voucher system, charge USB devices, have some indoor lights, and sometimes run the inverter for power tools or a fridge. It's very difficult to get batteries here, so the system is designed to maximize battery life.

The tool I built tracks components, costs, weight (everything was hand-carried on commercial airlines except batteries and solar panels), port types and terminal sizes, power requirements, current ratings, and other integration tests. It also tracks and stages Amazon purchases and tells me whether things will arrive on time.

I put the most work into the auto-routing and auto-layout system. All the components are positioned and connected automatically using an algorithm that is basically A* pathfinding over a 3d grid with carefully defined costs. The layouts and routes aren't perfect, but they are much, much better than what you might get out of the box.

My design approach for the app is that I didn't want any traditional UI for adding, removing, managing, moving, or routing. I wanted a chat-only interface. So this means there is no way to download or use this like an "app", but if you ask an agent to copy the repo then you'll have a good starting point for building your own system by describing what you want.

The installation is not perfect. The photo is from before the cables were tied down, before the batteries had a protective covering, and a few other details. But it works, and it has been working without a single change for about a month now.

Take a look at the live app here.

u/kcimc — 7 days ago