The short answer
mySigen is the app that comes with a SigenStor, and it does three jobs: it shows you where every kWh came from and went, it lets the system decide when to charge and discharge instead of making you decide, and it carries the updates, diagnostics and warranty claims.
Everything branded as AI sits on top of those three. None of it changes what your roof produces — it changes when stored energy gets used.
For the record: we are an early adopter of the Sigenergy SigenStor in the North East — we install and commission SigenStor systems and have two complete installs documented on our YouTube channel. Andy Pemberton specifies every system we quote, and we set the app up at handover.
The home screen, and the chart that matters
Open mySigen (version 4.0 at the time of writing) and you land on a 3D energy-flow view of the house that refreshes every ten seconds — quick enough to watch the kettle land on it.
The screen that changes behaviour is the Sankey diagram: it traces where each kWh came from and where it went, across six energy sources and five load categories. It also breaks down what charged the battery — PV, an external inverter, the EV DC module, a generator or the grid. A battery that is full every morning is not necessarily one your roof filled.
Underneath sit granular EMS settings, exposed to the owner. Leave them where commissioning set them unless how you live has changed; most "my battery is behaving oddly" calls trace back to a setting altered in month two.
What "Sigen AI" actually is
Sigenergy groups several things under the AI heading. They are not equally useful.
SigenAgent
Natural-language control — Sigenergy's framing is that you "simply describe what you want" rather than hunting through menus. Pleasant; not what decides whether the system pays for itself.
AI Mode
The one that matters. It schedules charging and discharging using real-time weather forecasts, your consumption patterns, battery status and electricity prices — Sigenergy sums it up as "buys low, stores smart, sells high". In practice it can fill from the grid overnight because tomorrow is forecast dull and prices are about to rise.
AI Insight
Explains what the system did over the past 24 hours and forecasts what it intends to do next, which is what stops people overriding the automation. Sigenergy also lists AI Search, AI Forecast and AI Peak Shaving.
Then the number quoted everywhere: Sigenergy claims AI Mode gives up to 50% higher average returns than traditional self-consumption mode. That is a manufacturer claim, not independently verified, and it assumes a price spread to trade against — which a flat import tariff does not give it.
Tariffs and time of use
The UK detail that makes the AI layer worth anything: Sigenergy's FAQ states that mySigen provides dynamic tariff data from Octopus Energy, and that British users can select Octopus Energy in the app's dynamic tariff function.
AI Mode takes electricity prices as an input. Give it a live price signal and it has something to work with — charge when the rate is low, discharge into the expensive part of the evening. Give it none and it degrades into self-consumption with a weather forecast attached.
So sort the tariff first, then judge the AI. On a fixed single-rate tariff a plain self-consumption setup gets you most of the way, and our guide to Octopus Flux and solar battery tariffs covers the trade-offs.
Backup: what the app can and cannot do
Backup is hardware. No setting in mySigen adds it to a system that was not built for it.
Sigenergy's Energy Controller datasheet quotes 0 ms disruption on the load side at switchover, and the footnote matters: it requires the Sigen Energy Gateway used together with the Energy Controller and the battery, with the controller's nominal power exceeding the total backup load. Off-grid, the controller delivers twice its nominal output for ten seconds.
The gateway comes in three shapes: HomePro SP, single-phase at 12 kW / 54.6 A; SP-F, single-phase at 22 kW / 100 A; and TP, three-phase at 30 kW / 45.6 A. Sigenergy says the SP-F "fully supports 100 amp single-phase backup power for the entire home", and its datasheet lists whole-house and smart prioritised backup as supported.
Software's role is prioritisation: the gateway can shed loads rather than dropping everything — Sigenergy's own example is cutting power to a heat pump once the battery falls below 20%. Which circuits stay live is configured at commissioning, so ask us to demonstrate it before we leave site.
And settle backup before you ask for prices: retrofitting a gateway means the board work happens twice. More in what to expect from a Sigenergy installation.
Smart loads and the EV charger
mySigen integrates Shelly smart-load devices and the Sigen Gateway, so loads can be switched remotely, automated on a time-of-use or AI schedule, or run on surplus PV; where a device is identifiable the app shows the energy mix powering it. The obvious candidate is an immersion heater.
If the optional SigenStor EVDC module is in scope, the car becomes another controllable load: scheduled charging, PV-surplus charging on 100% solar, battery-boost charging with a cut-off state of charge so the house battery is not drained flat, grid charging, and a fast mode pulling from grid, PV and battery at once. It supports OCPP 1.6J, RFID, app or no-authentication start, plus over-the-air updates and remote diagnostics.
One caution. Sigenergy markets the module as bi-directional for vehicle-to-home and vehicle-to-grid, but states on its own SigenStor page that V2X is limited by the EV's capabilities and can be upgraded over the air once the relevant standards are published. Treat it as V2X-ready and vehicle-dependent. If you only need overnight charging, our honest answer is that a straightforward AC charge point does the job for a lot less outlay, and our Sigenergy EV DC charger guide has the detail.
The app is also the service desk
mySigen is how the system gets supported. Warranty claims are raised through the support menu in the app, within 30 days of the failure under Sigenergy's European warranty — the app is the paperwork, not an optional extra.
The connectivity condition deserves attention. That warranty requires the equipment to stay internet-connected for firmware updates: offline for 90 days it enters Safe Operation Mode, and disconnected for more than a year cumulatively the 10-year cover drops to 5 years from activation. Those are Sigenergy's European warranty terms, so confirm them with Sigenergy UK before you lean on them. Detail in the Sigenergy warranty explained.
So connectivity is a survey question. The Energy Controller communicates over WLAN, Fast Ethernet or RS485, or the optional Sigen CommMod cellular module (4G/3G/2G). If the stack is going in a detached garage where the wi-fi already struggles, say so at survey.
Sigenergy claims a two-minute over-the-air upgrade and one-click full-system diagnosis, and lists UK technical support on +44 20 3872 0618 and service.uk@sigenergy.com — though for anything we installed, ring us first.
Our take from installing them
We have two complete SigenStor installs filmed end to end — a solar and battery install on a slate roof and a SigenStor with full home backup. Both show commissioning and the app going live.
For a month people open mySigen daily. By month three the households still getting value are the ones on a dynamic tariff who set a schedule and let AI Mode run, plus anyone who has put a genuinely flexible load on a smart switch. The rest check it occasionally, which is fine.
Two practical notes. The datasheet asks that the battery is recharged within seven days of being fully discharged, so do not run it flat and leave the house empty for a fortnight. And get the tariff schedule right on day one: almost every disappointing first bill we have looked at came down to a battery still discharging through a cheap-rate window.
Where we would tell you not to spend: on a flat tariff, with no EV and no interest in load-shifting, the AI layer is not the reason to buy a SigenStor — choose on hardware, warranty and price, and read our Sigenergy review, Sigenergy vs Tesla Powerwall 3 or the battery storage buying guide. It earns its keep on a dynamic tariff, with an EV or an immersion heater and somebody who likes the system trading on their behalf.
Getting it set up properly
The app is only as good as the commissioning behind it. At handover we set the operating mode around your actual tariff, configure smart loads and backup priorities with you present, and show you where the support menu lives.
We install across Teesside, County Durham and North Yorkshire from our base in Yarm. How far we travel depends on the job — just ask.
Send us your postcode through our contact page and Andy will come back with a configuration and a fixed price. Local detail sits on our Teesside and County Durham and North Yorkshire pages, and the full write-up is on the Sigenergy installer page.