Rayleigh Instruments published warranty conditions on 13 July 2023 for the Rayleigh 3-Phase Modular Energy Storage System, covering the RI-ENERGYFLOW-3P-MODULAR-10kW hybrid inverter and the RI-ENERGYPACK-MODULAR-5.1kWh battery pack1. The document sets out a voluntary product warranty for end users of products supplied by the company1.
The general term is five years from the date of purchase, during which Rayleigh will repair or replace a product or part it judges faulty or defective in manufacture or materials1. The company states that all systems are required to have an internet connection for monitoring, and that systems without one have their warranty reduced to three years1. For systems without a connection, the end user must report a defect as soon as possible, and each claim obliges the installer or end user to arrange qualified personnel for an on-site inspection and data collection under Rayleigh's instruction1.
"we warrant that the each battery module retains at least eighty percent (80%) of its usable capacity for 120 months"
That capacity guarantee applies to systems operating in self-consumption mode, running from the earlier of the installation date at the end user's property or two months after the product was sold to another business or person1. For other applications, the document states the warranty expires earlier once a total energy of 3MWh per kWh of usable capacity has been drawn from the battery1.
| Condition | Term or limit |
|---|---|
| General product warranty | 5 years from date of purchase |
| Systems without internet connection | 3 years |
| Battery capacity guarantee (self-consumption) | At least 80% of usable capacity for 120 months |
| Other applications | Ends at 3MWh drawn per kWh of usable capacity |
| Recommended working temperature | 0-40℃ |
| Storage temperature | -10℃ to +45℃ |
| Recharge interval at -10℃ to 30℃ | 12 months |
| Recharge interval above 30℃ to 40℃ | 8 months |
Installation must be by a properly certified MCS installer or one authorised by Rayleigh Instruments, and a commissioning report completed by the installer is required1. The warranty is non-transferable except where the products are installed in a building, in which case it transfers to a subsequent purchaser of that building or of the products while they remain installed1. Claims must be submitted within three months of knowledge of the matter giving rise to the claim, and allegedly faulty units must be returned within ten working days of receipt of the replacement1. For valid claims, the end user is not charged for reasonable costs including warranty processing, replacement parts or freight; for invalid claims, Rayleigh states it will not be liable for the end user's costs including transport or return freight1. Wrong deliveries, incorrect or damaged packing and transit damage claims are not warranty claims and should be referred to the seller1.
Why it matters for households
The internet connection condition ties the length of cover to monitoring rather than to the hardware alone, so a system installed without a live connection carries two years less protection and places the inspection burden on the householder or installer at each claim1. The capacity guarantee is expressed as retained usable capacity over a fixed period, which is the measure that determines how much a battery can still store later in its life, rather than the headline capacity at installation. The throughput limit for applications outside self-consumption means heavy cycling can end cover before the calendar term does1. Temperature ranges and recharge intervals set out in the conditions show that storage and operating environment form part of the terms, and the exclusions list covers damage from water entry, contamination, insufficient ventilation and unauthorised repair or parts1. Further detail on how retained capacity, throughput and conditions are treated across the market is set out in the guide to home battery warranties, with the wider context in the home batteries hub and the manufacturer warranties page.
What happens next
The document gives no expiry date for the conditions and no date by which the terms will be reviewed. Claims are made through the online monitoring customer feedback system or by email to the service address given in the conditions1. No further announcements on the system have been reported.
Sources1 cited
- RI-EnergyFlow-3P-Modular_Warranty_13_07_23.pdf, rayleigh.com