We configure Sunsynk systems remotely via SolarMan — battery schedules, export limits, Octopus tariff windows, and grid compliance settings. Most systems done in one session. If something has stopped working, the diagnostic is free and you pay £125 only if we fix it.
Book Remote Setup — £145 fixedSunsynk hubThis guide covers LCD interface settings only — not physical installation or wiring.
Excellent knowledgeable company which sorted out my Givenergy issues that no one else could sort! Initial remote diagnosis into what unit(s) where faulty which enabled me to confidently source and buy a replacement at a good price and on so doing Solar Tech then got my system up and running remotely within an hour or two. A1 service!
Contacted Ron with a problem and he sorted it out quickly with no problems at all. Very knowledgeable on anything solar/ batteries. I would recommend him to anyone
Solar Tech Support answered my initial enquiry swiftly. They provided remote support to establish what the issue was, and through their experience and network, managed to get my clients system back online. Once the system was online, STS managed to diagnose the main issue to get the ac coupled inverter and battery back online, a battery repair was required. A site visit was organise and within a few days, the system was tested and back up and running. This has saved my client, and probably myself huge costs and inconvenience now the system is back online and working correctly. Would highly recommend.
What an absolute star. Ron went well beyond what i would have hoped for. His attention to detail was incredible, even making good the work of others.
Unfortunately, only weeks after Givenergy went into receivership, our system failed. Our installers were unhelpful in the extreme but Solar Tech Support were able to diagnose a terminal problem with our Gen 1 AC3 inverter. They advised regarding the available options and (having decided to buy a replacement Givenergy inverter as the simplest solution) they were able to get us up and running. They made themselves readily available to talk through the process and manage any faults. I would have no problem recommending them.
Had a fault on a GivEnergy AC coupled 3kW home battery and was getting no joy from multiple companies I contacted, as well as the original installer. Contacted Solar Tech Support and they sorted it really quickly, now working perfectly again, can’t recommend them highly enough, professional and very responsive!
From the Home Page, tap the gear icon in the top-right corner of the LCD screen. This opens the System Setup screen with eight icons: Basic, Battery, Grid, System Mode, Advance, Aux Load, Fault Codes, and Li BMS. Each section is covered below in the order you'll typically configure them.
The LCD has four physical buttons below the screen: Esc (go back), Up (increase value), Down (decrease value), and Enter (confirm). You must press Enter after changing any setting — if you don't, the change won't be saved. On touchscreen models, you can tap directly on settings to change them.
Four LEDs sit above the screen: DC (green = PV connected), AC (green = grid connected), Normal (green = running normally), and Alarm (red = fault active). If Alarm is red, check Fault Codes before changing any settings.
Tap the Basic icon on the Settings screen. This section has four tabs: Time, Display, Reset, and Remote.
Set the correct date, time, and AM/PM. This is critical for charge and discharge schedules — if the clock is wrong by even an hour, your cheap-rate charging window won't fire when expected. During BST (late March–late October), make sure the clock reflects the +1 hour offset.
Set your system name (appears on the Home Page), toggle the beeper on or off, and configure Auto Dim (how many seconds before the LCD backlight dims). The beeper sounds for low battery warnings and fault alerts — most homeowners prefer it on.
Factory Reset restores all settings to defaults (password: 9999). Lock Out All Changes prevents any setting changes until unlocked (password: 7777). System Selfcheck runs an internal diagnostic (password: 1234). Locked Inverter fully locks the unit — only Sunsynk technical support can unlock it.
Tick "Allow remote control" to enable settings changes via SolarMan. This should be enabled for remote diagnostic and configuration support. If disabled, only LCD changes are possible.
Tap the Battery icon on the Settings screen. Three tabs: Batt Type, Batt Charge, and Shut Down.
Select your battery chemistry. Most UK installations use lithium-ion batteries.
After selecting battery type, configure:
This tab controls how and when the battery charges from the grid or generator.
For lithium batteries, voltage settings (Float V, Absorption V, Equalization V) are managed automatically by the BMS. For lead-acid batteries, use the manufacturer's recommended values — typical AGM: Float 55.2V, Absorption 57.6V, Equalization 58.8V for a 48V bank.
These settings control how deeply the battery discharges before the inverter takes action. Getting these right protects battery health and prevents nuisance shutdowns.
Tap the System Mode icon. This is the most important settings page — it controls how your system behaves day to day. Two tabs: System 1 (mode selection) and System 2 (charge/discharge scheduling).
Six settings control the core behaviour of your system:
When ticked, the CT coil monitors grid export and the inverter reduces output to prevent any power flowing back to the grid. Use this if you do not have an export tariff. The system will power your home load and charge the battery, but never export.
When ticked, the inverter operates in eco mode: solar covers your home load first, then charges the battery, then exports any surplus to the grid. This is the correct setting for SEG, Octopus Flux, or Octopus Agile export tariffs. When unticked, the inverter covers load, charges the battery, and then throttles PV production at 100% SOC — no export happens.
When ticked, the inverter only powers the backup (essential) load connected to the inverter's load port. The home load on the grid side receives no inverter power. Rarely used in standard UK setups — mainly for off-grid or specific backup configurations.
The amount of power (in watts) the inverter always draws from the grid. Set to 0W for standard UK credit meters. Only increase this (20–100W) for prepayment meters where Reverse Power Detection can cause the meter to trip. Almost never needed in the UK.
Caps the maximum combined output to both Load and Grid ports. This is not your export limit (that's Max Sell Power). The default matches your inverter rating (e.g., 5000W for a 5kW model). Only reduce this if instructed by an engineer — it gets set to Low automatically if an over-current fault occurs.
When ticked, solar generation is directed to your home load first, then to the battery. This is the standard UK setting — you want to self-consume as much solar as possible. When unticked, solar charges the battery first, which is rarely what you want unless running a specific arbitrage strategy.
This is where you program when the battery charges from the grid and when it discharges. Tap the System 2 tab to see the scheduling grid.
Worked on the current Go cheap rate of 00:30–05:30. Go windows vary by variant, so substitute the hours from your own tariff agreement. Charge the battery to 100% overnight, then self-consume and discharge through the day.
| Slot | Start | End | Power | SOC | Grid |
|---|---|---|---|---|---|
| 1 | 00:30 | 05:30 | 5000 | 100% | Yes |
| 2 | 05:30 | 23:59 | 5000 | 20% | No |
Slot 1 charges from grid to 100%. Slot 2 discharges down to 20% (the Shutdown threshold) through the day. System 1 should have Zero Export ticked and Priority Load ticked.
Tap the Grid icon. These settings control how the inverter interacts with the UK grid. Grid settings are locked by default — tick "Unlock Grid Settings" and enter the password to make changes.
If you selected Lithium as battery type, tap the Li BMS icon to verify communication. The BMS page shows battery voltage, current, temperature, total SOC and SOH, and individual cell data.
Key settings when configuring lithium batteries:
We configure Sunsynk hybrid inverters remotely via SolarMan — charge schedules, export limits, battery thresholds, and Octopus tariff windows. Most configurations completed in a single session.
Due to unprecedented demand we’re currently only carrying out on-site work in Yorkshire, and replies are taking up to 7 days. Remote diagnostics continue for the whole UK as normal.
Every message is read and answered, so please don’t send it twice; that only slows the queue.
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