Switching Energy Supplier with Solar Panels

Having solar panels doesn't lock you into any particular energy supplier. You can switch freely — but there are a few things to check to make sure your solar setup continues working properly and you don't lose export payments.

What Happens When You Switch?

When you switch electricity supplier with solar panels:

• Your solar system: Completely unaffected. It generates the same electricity regardless of who you pay.
• Your import tariff: Changes to the new supplier's rate.
• Your export tariff (SEG): May or may not change — depends on whether your SEG is with the same supplier.
• Your smart meter: Continues recording import and export. The new supplier reads it remotely.

The physical equipment doesn't change. The switch is purely administrative.

Switching Import Supplier

This works identically to switching without solar:

1. Compare tariffs (use comparison sites or check directly)
2. Sign up with the new supplier
3. The new supplier handles the switch (typically 5 working days)
4. Your old supplier sends a final bill
5. Your new supplier starts billing

Things to check with the new supplier:

• Do they support smart meter export recording? (Most do, but confirm)
• Do they offer time-of-use tariffs that work with solar/battery? (Flux, Agile, etc.)
• Will the switch affect your smart meter functionality?

Switching SEG Supplier

Your SEG (export) tariff is independent of your import tariff. You can:

• Keep the same SEG supplier when you switch import supplier
• Switch SEG supplier independently of your import supplier
• Have different companies for import and export

When to Switch SEG

Switch if you're on a low flat-rate SEG (below 10p/kWh) and a better option exists. In 2026, Octopus Energy's export tariffs (Agile Export, Flux Export) typically pay 2–4 times more than flat-rate alternatives.

How to Switch SEG

1. Apply to the new SEG supplier (provide MCS certificate, meter details)
2. Once accepted, cancel with the old SEG supplier
3. Confirm the start date to avoid any gap in export payments

There's usually no notice period or exit fee for SEG agreements.

Why Time-of-Use Tariffs Matter for Solar Owners

Switching to a time-of-use (ToU) tariff can dramatically increase your savings with solar and battery:

Octopus Flux

• Cheap rate (02:00–05:00): ~7p/kWh — charge your battery overnight
• Standard rate: ~24p/kWh — normal pricing
• Peak rate (16:00–19:00): ~34p/kWh — discharge battery or use solar
• Peak export (16:00–19:00): ~25p/kWh — export stored solar at premium rate

Octopus Agile

• Variable pricing: Changes every 30 minutes based on wholesale market
• Cheap periods: Often 5–10p/kWh overnight and during high solar periods
• Expensive periods: 30–50p/kWh during peak demand
• Negative pricing: Occasionally you're paid to use electricity

A battery owner on Octopus Flux or Agile can save £200–£500/year more than on a standard flat-rate tariff, simply through intelligent charging and discharging.

Smart Meter Considerations

SMETS2 Meters

Modern SMETS2 smart meters work with all suppliers and maintain full functionality during switches. Import and export are recorded automatically.

SMETS1 Meters

Older SMETS1 meters sometimes lose smart functionality when you switch supplier (going "dumb"). If this happens:

• The meter still works as a standard meter
• You may lose remote reading and need to submit manual readings
• Export recording may stop, affecting SEG payments
• Request a SMETS2 upgrade from your new supplier

No Smart Meter

If you don't have a smart meter, some SEG suppliers will estimate your export (usually at 50% of generation). This may over- or under-pay you. Getting a smart meter installed (free from your supplier) ensures accurate export measurement.

Practical Checklist for Switching

Before switching:

• Note your current SEG supplier and rate
• Check whether you want to switch SEG too (or keep it separate)
• Confirm the new supplier supports smart meter export recording
• Check if the new supplier offers beneficial ToU tariffs for solar/battery
• Take meter readings (import and export) on the switch date

After switching:

• Verify your smart meter is communicating with the new supplier
• Check that export is still being recorded
• Confirm SEG payments are continuing (same or new supplier)
• Monitor your first bill to ensure solar generation is reflected correctly

The Bottom Line

Switching energy supplier with solar panels is straightforward and can save you money — particularly if you switch to a time-of-use tariff that rewards solar generation and battery storage. The solar system itself is completely unaffected by the switch.

If you haven't reviewed your tariff since installing solar, it's worth checking whether a better option exists. The combination of cheap import rates + high export rates on tariffs like Octopus Flux can add hundreds of pounds per year to your solar savings.

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