r/SigenergyAustralia

Edit: Solved - it's a limitation of my 12 kW gateway.

I'm trying to maximise battery charging during the 3 hour free window but it seems that my house load + battery charging is being capped at 13.4 kW when I'd expect this to be 19.2 kW (80 amp breaker).

This is in situations when I have no solar being produced so I'm relying only on grid.

If my local load increases above 3.4kwh then my charging decreases by the same amount.

local load:

• 4.4kWh, charging at 9 kW
• 5.4kWh, charging at 8 kW
• 8.4kWh, charging at 3 kW

Relevant Modbus parameters:

• ESS Max Charging Limit: 24 kW
• Grid Import Limitation: 20 kW
• PCS Import Limitation: 20 kW

Setup:

• 10 kWh SigenStor
• Single Phase Gateway
• 80A main breaker
• 28kWh Solar Panels (not relevant here)

Why are my imports being limited to 13.4 kW here?

It’s happened a couple times now. Lights in my house dim slightly then come back.

House is being run off the battery, nothing coming in from the mains. Load is only around 0.2kW. It has been raining and cold when this happens so not sure if that has an impact.

Is this normal/to be expected, or something I should get my installer to come back and check on?

Are there logs or anything that I can look at to see what might be happening?

Thx

Hi guys,
need some clarification.

should the third-party inverter AC output be connected through a suitably rated CB before landing on the Smart Port circuit?

thanks in advance

I have a system with 6.6kw for panels, and a 15.6kwh battery. I've had this close to a year now, and had it on AI mode pretty much from the start.

I'm on the OVO EV plan, which basically means free electricity between 11am and 2pm; 8ct between midnight and 6am, and pretty expensive any other time. And a pretty low feed in tariff of 2.7ct.

So ideally I'd like to charge my battery while it is free from 11am to 2pm, and then use that when the electricity is expensive in the peak hours.

The AI took care of that quite nicely for a while, but recently I noticed it is not doing that anymore - without me changing any config.

Up till yesterday I had it set to AI - Profit optimisation, and saw that the battery was near empty by 3pm - so had to use grid power at expensive rates, and I saw that it hadn't charged at all during the free hours.

I changed it to AI - self consumption, and I see the same behaviour today.

Has something changed in the AI recently? or should I just give up on AI and set this schedule manually myself? if so, what's the best way to do that in the app? which mode do I pick?

(and yes, all rates are correctly configured with their exact TOU - I checked).

Hello!

So I had the system configured in Time Based Control with Globird ZeroHero for months and it was exporting power to grid fine during the 6-8pm extra FIT window.

However, we recently got an induction oven installed and the electrician had to cut power to the house (they were aware we have the battery system).

Since then, it doesn't seem to be able to export to grid from the battery at all. During the discharge window, it just acts like it's in self consumption mode. Although, excess solar during the day still seems to export to grid (system is AC coupled to existing solar inverter).

I've checked the switchboard/gateway and everything looks correct (as it was pre-power cut). I've also tried changing the battery mode, installing an update and power cycling the inverter to no luck.

If I take "manual control" and set it to discharge, nothing happens. If I set the battery mode to "Fully feed in to grid" nothing happens either.

Does anyone have any ideas what this might be? I have reached out to my installer but waiting on response. Thanks!

I came across this situation. I explain a bit between some cheaper and a bit expensive like Sig systems like pros and cons. I think at the end they are influenced by the installer and go for cheaper options. I guess it makes sense as ROI is better for cheaper options.
Does anyone came across similar situation? If yes, how would you respond?

Just wondering if you need the original company that installed the battery to install the charger also or can any sig installer enable once installed?

Thanks

Just wanting to see if anyone has a simple solution to this.

Is there a way to specify that I want to discharge 10kWh (or even ideally be able to amend it to different values), during a time window, 6-8pm (this is for Globird's export incentivised window).

Currently in the app I have time based control, and set discharging 6-8pm at a rate of 5kW but there is no way to force it to export a set kWh to grid, and adjust itself.

So during that window, if the house has a spike or uses more than 5kW it will then import from grid. It is impossible to end up after 2 hours at the exact amount of kWh you want to export.

I've been experimenting with a fairly niche setup and thought it might be useful to someone else.

I recently added a Sigenergy SigenStor (20 kW / 32 kWh) alongside an existing Fronius GEN24 (5 kW) + BYD (13.8 kWh) system.

One thing I wasn't happy with was that the GEN24 couldn't "see" the real site load once the Sigenergy battery was managing import/export. As a result, the Fronius would often start charging the BYD even though I'd rather use the available PV to charge the Sigenergy battery first.

To solve this, I built a small Home Assistant add-on that emulates a Fronius Smart Meter over Modbus TCP. It reads the Sigenergy Modbus registers and presents the GEN24 with a virtualised grid import/export value (with optional virtual load compensation), allowing the Fronius to prioritise supplying site demand before charging the BYD.

It won't suit every installation, but if anyone else is running a mixed Sigenergy + Fronius system, it might be useful.

I'd be interested to hear if anyone else has tried something similar or has ideas for improving it.

GitHub:
https://github.com/systemx-xx/ha-energy-addons/tree/main/fronius_sigenergy_direct

I’ve seen a people worrying about running out of their battery 10-year warranty early if they set their Depth of Discharge (DoD) to 100% every single day. The concern usually comes from multiplying 7.8 kWh by 365 days over 10 years, which mathematically pushes you past the official 23.77 MWh throughput limit around year 9.

But you really don't need to baby your battery or artificially limit it to 80% or 90%. Here is why you will still easily make it to the 10-year mark with a 100% daily cycle:

1. Natural Degradation Matters: Your battery doesn't stay at a perfect 7.8 kWh forever. Because lithium cells naturally degrade over time, you will physically pull out less energy each year (e.g., dropping to ~6.8 kWh by year 5 and ~5.5 kWh by year 10). Because the capacity shrinks, your actual accumulated throughput drops and will land safely under the 23.77 MWh ceiling by year 10.

2. Real-World Weather: You won't get a perfect 100% charge and discharge 365 days a year. Heavy winter overcast days and vacation times mean the battery will naturally rest, saving your MWh allotment.

Set it to 100% discharge, maximize your daily power savings, and let the system do its job. The warranty was designed for exactly this.