Under normal circumstances, if a product failed to function after five years, I would not rate the supplier with five stars, however that is not the case with Intelligent Immersion.
On contacting Paul McAllister when our I2 stopped working he advised me that they had fitted a faulty batch of fuse carriers and that despite our unit being well beyond the warranty period, they would rectify the fault free of charge.
In less than a week our I2 was functioning again providing us with free hot water, as it does for approximately ten months of the year.
The excellent device and superb service means that I would recommend this company and their product to anyone with photovoltaic panels.