We have a complete Victron unit with solar panels and lead acid batteries ( we are off grid)
The first set of batteries( lead acid) lasted 6 years before voltage failure in two batteries , so we replaced all four with Victron lead acid batteries guaranted for two years. After 18 months one battery failed going from 12v to 9 v storage in à week thé supplier and Victron are refusing to honour the warranty .
Is this common practice in the industry?
The warranty is limited, so there are exclusions.
Installation issues or charging/discharging incorrectly would void the warranty.
You would need to be able to show that it was a genuine fault vs installation/configuration/use.
Because we are off grid we do not have a wired internet connection but we have the Victron app on our phones showing the batteries have been correctly charged and never deep discharged.
It’s difficult over the internet to comment apart from confirming it is a limited warranty (you can download it).
The supplier would need to provide a justification why warranty is being declined.
Warranty
2 years from date of purchase by the original end-user, with a maximum of 30 months from the Victron Energy
invoice date, Lithium batteries: 3 years from date of purchase by the original end-user, with a maximum of 42 months from the
Victron Energy invoice date. In addition to this, proof of correct battery usage is required when making a battery warranty claim.
If the batteries are very old stock, you may fall outside of the warranty period.
That’s why we stopped selling lead batteries 7 or 8 years ago.
The quality was dropping dramatically (across different manufacturers).
The race to the bottom is a real thing.
It is common practice in the world I’m afraid, but in this case how on earth would you prove compliance, installation by approved installer / non stop data logs / tamper proofing of installation and parameters that may be required if going legal.
Read the small print of any guarantee / insurance and good luck complying / proving all of it.
As an example, i was watching congressional hearings the other day on USA house insurance and oh boy what a scam.