Installing solar panels and battery storage is only half the equation. Pairing your system with the right electricity tariff can add £200–£600 per year to your savings — an increase of 20–40% over a standard tariff. In 2026, the smart tariff market has matured significantly, and the right choice depends on your system, your consumption patterns, and your appetite for complexity. This guide cuts through the noise and tells you exactly which tariff to choose.
Why Your Electricity Tariff Matters for Solar Owners
A standard electricity tariff charges the same rate regardless of when you use electricity. For solar owners, this means you receive no reward for the clever energy management your system does automatically — storing cheap solar, avoiding expensive peak periods, and exporting only genuine surplus.
Smart tariffs price electricity differently at different times of day. This allows solar and battery owners to earn more when exporting, pay less when importing, and optimise their battery's charge/discharge cycles to maximum financial advantage.
The Best Tariffs for Solar + Battery (2026)
1. Octopus Flux — Best Overall for Solar + Battery
Octopus Flux is designed specifically for solar and battery households. It has three pricing periods:
- Flux Off-Peak (02:00–05:00): Very cheap import rate — charge your battery from the grid
- Standard: Mid-range rate during daytime hours
- Flux Peak (16:00–19:00): High import, high export rate — discharge your battery and earn maximum SEG
For a 4.5kW solar + 9.5kWh GivEnergy household, Octopus Flux typically delivers annual savings of £500–£800 over a standard tariff. GivEnergy batteries integrate natively with Octopus Flux for fully automated optimisation.
2. Octopus Agile — Best for Maximum Export Income
Octopus Agile prices change every 30 minutes, tracking the wholesale electricity market. Import prices can fall below zero (you get paid to use electricity) during high renewable generation periods — typically windy nights and sunny early afternoons. Export prices through Agile Export can reach 31p/kWh during winter evenings.
Agile is best for technically savvy homeowners who actively monitor their battery's charge schedule and can set custom automation. The potential savings are highest — £600–£900+/year for optimised systems — but it requires more engagement than Flux.
3. Octopus Go — Best for Solar + Battery + EV
Octopus Go offers 7.5p/kWh for 4 hours overnight (00:30–04:30) and approximately 24.5p/kWh the rest of the time. If you have an EV alongside solar and battery, Go is the simplest and most reliable way to charge both your battery and your car cheaply overnight. Annual savings of £400–£600 over standard tariff for solar + battery + EV households.
4. Octopus Intelligent — Best for Large EV + Solar
Intelligent Octopus Go offers the same 7.5p rate but for up to 6 hours, with the charging period flexed by Octopus's smart scheduling to coincide with periods of low grid carbon intensity. For households with a large EV (60kWh+), Intelligent Go maximises the value of overnight cheap charging. The charger must be a compatible model (Zappi is compatible).
Smart Export Guarantee Rates (2026)
The Smart Export Guarantee pays you for surplus solar electricity exported to the grid. The rate varies dramatically between suppliers:
- Octopus Agile Export: 3–31p/kWh variable, average approximately 15p/kWh — best available
- Octopus Fixed Export: 15p/kWh — good fixed alternative
- Octopus Flux Export: Variable, highest during 16:00–19:00 peak
- E.ON Next: 4.1p/kWh — significantly below Octopus
- British Gas: 3.2p/kWh
- EDF: 3.0p/kWh
Switching from a 3p/kWh SEG rate to Octopus Agile Export (average 15p/kWh) on a 4kW Bristol system exporting 800 kWh/year adds approximately £96/year in additional export income — essentially for free.
GivEnergy Battery + Smart Tariff Integration
GivEnergy batteries have native integration with Octopus Energy tariffs, including Go, Agile, Flux, and Intelligent. Once connected, the battery app automatically schedules charging and discharging to optimise for your tariff — no manual intervention required. This is one of GivEnergy's key strengths and a major reason why D&R Energy recommends GivEnergy for most homes.
Tesla Powerwall also integrates with time-of-use tariffs through the Tesla app, though the level of integration with UK-specific tariffs like Octopus is less seamless than GivEnergy. For most Powerwall users, manual scheduling works effectively.
D&R Energy configures your battery's smart tariff settings as part of every installation. We also help you switch to the optimal energy tariff for your system. Visit our battery storage page or call 0800 772 0758 for a personalised tariff recommendation.
