How do I switch to a time-of-use tariff from my current plan?

Start by contacting energy providers offering time-of-use tariffs (like E.ON Next’s Next Smart Saver) to compare pricing structures. You’ll need a smart meter installed if you don’t already have one. Once confirmed, your new supplier will coordinate the switch, which typically takes 5-21 days. For homes/businesses with storage systems, integrate usage to maximise savings during off-peak periods.

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Step-by-step switching process

1. Check your current tariff
   Determine if you’re on a fixed or variable tariff. Exit fees may apply for fixed contracts, but switching near the end term avoids penalties.

2. Compare tariffs
   Focus on three criteria:

• Off-peak/super off-peak windows (e.g., 2-5am for super off-peak)
• Price differential between peak/off-peak rates
• Contract length (new fixed tariffs like E.ON’s 12-month option stabilise pricing).

1. Smart meter installation
   Mandatory for time-of-use tariffs. Contact your current supplier to install one free of charge if unavailable.

2. Schedule the switch
   Opt for:

• Immediate transfer (5 working days)
• Delayed transfer (post 14-day cooling-off period).

1. Final meter reading
   Submit readings on switch day to both suppliers to ensure accurate billing.

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Home storage integration

How it works
Charge batteries during super off-peak periods (e.g., 16.33p/kWh 2-5am) and use stored energy during peak hours (38.48p/kWh 4-7pm).

Real-world UK example:
A household with a 10kWh battery could save £2.19 daily by charging at super off-peak vs. peak rates (based on E.ON Next’s 2025 tariff rates).

Key considerations

• Battery capacity: Match storage size to daily usage (5-15kWh typical for UK homes).
• Appliance timing: Program dishwashers, EV chargers, and heat pumps to align with off-peak windows.

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Pros and cons

Advantages	Risks
Lower bills through strategic usage	Higher peak rates punish inflexible users
Grid stability support reduces carbon footprint	Storage upfront costs (£2,000-£8,000 for home batteries)
Fixed-rate options now available (e.g., E.ON Next Smart Saver)	Smart meter dependency limits tariff access

Common mistakes

• Ignoring lifestyle compatibility: If a family cannot delay cooking or laundry until off-peak periods, they benefit less.
• Overestimating storage savings: Batteries only pay back with strict usage management.
• Neglecting exit fees: Switching mid-fixed-term often incurs £30-£75 penalties.

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Recent UK developments

• April 2025: E.ON Next launched the first mass-market fixed time-of-use tariff with three rate periods, eliminating previous requirements for EVs/heat pumps.
• 2024-25: Ofgem reports 35% growth in time-of-use tariff adopters, driven by smart meter rollout and volatile energy prices.
• Battery grants: Scotland’s Home Energy Scotland Loan offers up to £6,000 for storage installations (2024 guidelines).

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Practical tips

• Gradual shifts: Move one high-use appliance (e.g., washing machine) to off-peak first.
• Monitor habits: Use smart meter dashboards to identify “peak traps”.
• Hybrid approach: Combine tariff switching with solar panels to maximise storage return on investment.