Most people choose a battery on the hardware and then live with the app for the next ten years. With Sigenergy, that app is mySigen, and it does more than show you a pretty energy flow. It decides when your battery charges and discharges, it is how Sigenergy supports and updates the system, and it is where tariffs like Octopus come in. We set mySigen up at the handover of every Sigenergy system we install across Dorset, Hampshire and Wiltshire, so here is a plain-English guide to what it does and how to get the best from it.
What the mySigen app shows you
The home screen is a live picture of your house: what the solar panels are producing, what the battery is doing, what the home is using and whether you are importing or exporting. Underneath that you get daily, monthly and yearly history, so you can see how much of your electricity came from your own roof and battery, and how much you still bought from the grid.
That history is the most useful part for most households. After a few weeks it tells you, in your own numbers, whether the battery is the right size, whether it is running flat too early in the evening, and whether a different tariff would suit you better.
The operating modes, and which one to use
A Sigenergy system can run in a few different ways, and choosing the right one matters far more than any other setting.
- Maximum self-consumption. The battery stores spare solar and uses it to run the house later. Simple and reliable, and the right choice on a standard single-rate tariff.
- Time-based control. You set the windows yourself: charge from the grid at a cheap overnight rate, hold, or discharge in the expensive part of the day. Good on a fixed time of use tariff where the cheap hours never change.
- Sigen AI Mode. The system plans charging and discharging for you, using the weather forecast for your solar, your usual consumption pattern and the electricity price. Sigenergy’s documentation lists the UK among the countries where AI Mode can read dynamic tariff prices directly.
Our honest view: AI Mode earns its keep when there is a price difference to work with, such as a dynamic or time of use tariff. On a flat tariff there is very little for it to optimise, and plain self-consumption does almost the same job.
mySigen and Octopus tariffs
Octopus is the supplier most of our battery customers ask about, and there are two quite different ways a Sigenergy system can work with it.
Option 1: you stay in control with mySigen
Sigenergy states that mySigen provides dynamic tariff data from Octopus Energy, and UK users can select Octopus in the app’s dynamic tariff setting. With AI Mode switched on, the system can then charge when your rate is low and use stored energy when it is high. If you are on a time of use tariff with fixed cheap hours, time-based control with those hours entered does the same job without any AI.
Option 2: Octopus runs the battery for you
Intelligent Octopus Flux is an Octopus tariff where Octopus itself takes control of your battery and decides when to charge, use and export. Published compatibility lists for the tariff include Sigenergy. Availability of Intelligent Octopus Flux to new customers has changed during 2026, so check the current position with Octopus before you plan around it. If you do go on it, remember that Octopus is making the decisions, not AI Mode, so you would not run both at once.
Whichever route you choose, the tariff decision comes first. We talk it through at survey, because the right battery size depends on how you will use it.
Backup is set by hardware, not the app
A common misunderstanding is that backup in a power cut is a setting you can switch on in the app. It is not. Backup needs a Sigen Gateway fitted and wired at installation. Once it is there, mySigen shows the backup status and lets you set a reserve, which is the amount of battery kept back for a power cut so it is not all used up running the house in the evening. Our Sigenergy Gateway guide explains the options.
If you think you might want backup in the future, say so at survey. Fitting the gateway at the start is far simpler than coming back later.
EV charging in the app
If your system includes a Sigenergy EV charger, it appears in the same app. You can charge the car from surplus solar, on a schedule, or as fast as possible, and you can stop the car draining the house battery. That joined-up control is one of the main reasons people choose Sigenergy over a separate charger and battery. Our Sigenergy EV charger guide covers the AC charger and the DC charging module.
Sigenergy and Home Assistant
We get asked this a lot by customers who already run a smart home. There is no official Sigenergy integration for Home Assistant, but community-built integrations exist that read the system over Modbus TCP on your home network. A few practical points if you want to go down that route:
- The Modbus TCP server has to be enabled on the system, and owners report that this usually needs the installer to do it. We can switch it on for you.
- Give the Sigenergy system a fixed IP address on your router so the connection does not drop.
- These integrations are written and maintained by enthusiasts, not by Sigenergy, so updates on either side can occasionally break them.
- Be careful with anything that writes settings back to the system. Reading data is low risk. Changing charge and discharge commands from two places at once, Home Assistant and AI Mode for example, is a recipe for odd behaviour.
Keep it online
mySigen is also how the system is supported. Firmware updates arrive over the internet, faults can be diagnosed remotely, and warranty claims go through the app. Sigenergy’s warranty terms expect the system to stay connected for updates, so a reliable connection where the battery is installed matters. If your garage or utility room has weak wifi, tell us at survey. A wired connection or a small wifi booster usually solves it.
Getting the most from the mySigen app
- Choose your tariff first, then pick the operating mode to match it.
- Look at the history after a month, not after a day. One sunny or grey day tells you very little.
- Set a sensible backup reserve if you have a gateway.
- Leave the advanced settings where they were commissioned unless something about your home has changed, such as a new EV or heat pump.
- If the battery behaves oddly, call your installer before changing things. Most problems we see are a setting changed months earlier.
mySigen app FAQs
Is the mySigen app free?
Yes. It comes with the system and there is no subscription to monitor or control your own Sigenergy installation.
Does Sigen AI Mode work with Octopus Agile?
Sigenergy says UK users can select Octopus Energy in the app’s dynamic tariff setting, which is what AI Mode uses to plan around prices. We confirm the setup for your exact tariff at handover.
Can I use Sigenergy with Intelligent Octopus Flux?
Sigenergy appears on published compatibility lists for Intelligent Octopus Flux, but Octopus has changed who can sign up during 2026. Check with Octopus first. If you join, Octopus controls the battery instead of AI Mode.
Can I add backup later through the app?
No. Backup needs a Sigen Gateway installed and wired in. The app only manages backup once that hardware is there.
Does Sigenergy work with Home Assistant?
Not officially, but community integrations read the system over Modbus TCP. The Modbus setting usually needs enabling by your installer.
Talk to a local Sigenergy installer
Thinking about a Sigenergy system and want it set up properly around your tariff, your EV and your backup needs? We design and install Sigenergy with our own employed teams across Dorset, Hampshire and Wiltshire. Read our SigenStor battery guide, see our Sigenergy installer page, or request a free, no-obligation quote. You can also call us on 01202 985 888.