Sainsbury’s Energy Contact Number & Opening Hours
Every way to reach Sainsbury’s Energy — phone, email and out-of-hours routes — plus what to do in an emergency and how to escalate a complaint.
Checked 6 September 2026. EnergyPlus is an independent comparison service and is not affiliated with Sainsbury's Energy.
Sainsbury’s Energy is supplied and operated in partnership with E.ON Next, with billing under the Sainsbury’s Energy brand and Nectar points on top.
All Sainsbury’s Energy phone numbers
| What for | Number | Hours |
|---|---|---|
| Customer service (free) | 0808 501 5277 | Mon–Fri 9am–5pm |
Email and other ways to reach Sainsbury’s Energy
- Support: hi@sainsburysenergy.com
WhatsApp support runs 8am–10pm, seven days a week.
Emergencies — do not phone Sainsbury’s Energy
Smell gas? Call the free 24/7 National Gas Emergency line on 0800 111 999. Power cut? Call 105 free from any phone — both go to the network operator, not your supplier.
If Sainsbury’s Energy can’t resolve it
Raise a formal complaint with Sainsbury’s Energy first. If it isn’t resolved within 8 weeks (or you receive a deadlock letter), you can escalate free of charge to the Energy Ombudsman, whose decision is binding on the supplier.
While you’re here — are you on the right tariff?
If you’re calling about a bill, most people save more by checking their tariff than by negotiating. The Ofgem price cap is reviewed quarterly — see our price cap hub for the current figures.
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