Solis Not Exporting — Export Limit, CT Clamp & G98 Configuration
Your Solis inverter is generating power but nothing is going to the grid. The three most common causes are a zero export limit in SolisCloud, a reversed CT clamp, or wrong G98/G99 grid code settings. This guide walks through each one.
We check your SolisCloud settings, export limit, CT clamp readings, and grid code configuration remotely. Most no-export issues are resolved in a single session.
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Key point: A Solis inverter that generates but does not export is almost always a configuration issue — not a hardware fault. The export limit setting, CT clamp direction, and grid code are the three things to check. All three can be diagnosed remotely using SolisCloud data.
5-step no-export diagnostic
Work through these steps in order. The first two cover the most common causes — most no-export issues are resolved at step 2 or step 3.
Confirm the inverter is generating but not exporting
Open SolisCloud (soliscloud.com or the app) and check two readings on the live dashboard:
If generation is positive (e.g. 2.5kW) but export shows zero or near-zero, you have a confirmed no-export condition. The inverter is producing solar power but is not sending it to the grid.
Check the export limit setting in SolisCloud
This is the most common cause of Solis no-export. The export limit tells the inverter the maximum power it is allowed to send to the grid. If set to zero, no export occurs.
Some export limit settings require installer-level access. If you cannot change the setting yourself, STS can adjust it remotely.
Verify the CT clamp is installed correctly
The CT (Current Transformer) clamp sits on your main AC cable and tells the inverter how much power is flowing to and from the grid. If installed backwards, everything inverts:
Arrow on CT clamp points towards the grid (away from your home). Inverter reads export correctly and manages power flow.
Arrow points towards your home. Inverter reads import as export — thinks it is already exporting and blocks further export.
How to check remotely: Wait for a sunny period when household consumption is low. If SolisCloud shows high import when it should show export, the CT clamp is likely reversed.
Physical correction requires safe access to the main AC wiring — a qualified engineer should flip the clamp.
Check G98/G99 grid code configuration
Solis inverters must be set to the correct UK grid code. Wrong settings can cause the inverter to restrict or block export:
Grid code changes typically require installer-level SolisCloud access.
Check if the generation meter is registering export
Sometimes the inverter is exporting, but the metering is wrong. If SolisCloud shows export but your energy supplier does not record it:
If the inverter is exporting (confirmed in SolisCloud) but the meter is not recording it, the issue is meter configuration — not the inverter. Contact your energy supplier about the meter setup.
Why Solis systems stop exporting — and how it gets missed
The most common scenario we see is a Solis system that was installed correctly but had its export limit set to zero during commissioning — either deliberately (to comply with a DNO restriction that has since been lifted) or accidentally (factory default left unchanged). The homeowner only notices months later when they realise their Smart Export Guarantee payments have stopped or their electricity bills haven't dropped as expected.
The second scenario is a CT clamp installed the wrong way round. This is an installation error that causes the inverter to misread grid flow. The inverter thinks the house is importing heavily when it is actually exporting, so it restricts output to avoid exceeding what it believes is the export limit. The result is zero or near-zero export even on sunny days with low household consumption.
Both issues are diagnosable remotely using SolisCloud monitoring data. STS reviews your inverter settings, export limit configuration, CT clamp readings, and grid code parameters as part of a standard remote diagnostic. If the CT clamp needs physically flipping, we confirm the diagnosis remotely and arrange an on-site visit to correct it.
Solis no export — common questions
The three most common causes are: the export limit in SolisCloud is set to zero, the CT clamp is installed backwards, or the G98/G99 grid code configuration is wrong. All three are configuration issues — the inverter hardware is usually working correctly. STS diagnoses these remotely using SolisCloud data and inverter settings review.
Log into SolisCloud and navigate to your inverter's settings. Find the Export Limit or Power Control section and set it to your permitted value — typically 3680W for G98 domestic systems. Some settings require installer-level access. If you cannot change the setting yourself, book a remote diagnostic and STS can adjust it for you.
Check SolisCloud when the sun is shining and household consumption is low. If SolisCloud shows high import when it should show export, the CT clamp is likely reversed. The arrow on the clamp body should point towards the grid, away from your consumer unit. A reversed clamp causes the inverter to block export because it thinks you are already exporting.
In most cases, yes. Export limit settings and grid code configuration can be checked and corrected remotely through SolisCloud. If the problem is a reversed CT clamp, we confirm the diagnosis remotely using monitoring data, but the physical correction needs someone on site. STS provides both remote diagnostics and on-site visits across the UK.
G98 applies to installations up to 3.68kW per phase — these can connect without prior DNO approval. G99 applies to larger systems and requires formal application. The grid code setting determines voltage and frequency protection limits. Using the wrong code can cause the inverter to restrict export or disconnect unnecessarily. See our G98 vs G99 guide for the full explanation.
Solis not exporting? We fix it remotely.
We review your SolisCloud settings, export limit, CT clamp data, and grid code configuration. Most no-export issues are diagnosed and resolved in a single remote session.