A heat battery becomes part of the property's heating or hot-water infrastructure. A buyer needs more than an app login and a brochure.
The short answer
Keep installation, electrical, building-control, commissioning, warranty and service documents together. Explain the normal charge schedule and which tariff assumptions shaped it without claiming the buyer will receive the same tariff.
Handover file
- exact product and serial number
- installation and user manuals
- electrical and compliance certificates
- commissioning sheet and system diagram
- warranty registration and transfer steps
- service and repair history
- installer and maker support contacts
- controls, local access and account-transfer process
Tariff is not part of the appliance
The next owner may choose a different supplier or rate. State the current schedule and energy use, but let them arrange their own account and verify off-peak times.
Digital access
Remove personal data, transfer ownership through the maker's process and avoid sharing a personal email password. Confirm that core functions remain available during the transfer.
Buyer questions
Expect questions about hot-water capacity, running cost, remaining warranty, servicing and backup. Use records and measured bills, not an unsupported savings claim.
Survey access
Keep the unit, isolators and labels visible. Do not box in service clearances to improve the cupboard's appearance.
Your next step
Create the property handover folder at installation, not when a sale begins. Update it after every service, software change or warranty claim.
Sources
Primary and independent references checked by our editorial team.
- Installing renewable technology at home — Energy Saving Trust Checked 10 Nov 2026