Blimey, this hits close to home — had a similar headache with a Victron MultiPlus in my van build where the sparky who fitted it bought it through some dodgy grey-market channel and the paper trail basically vanished into thin air.
Here's the thing with Victron specifically: they're actually pretty decent about warranty claims when you've got online registration, and the serial number does a lot of the heavy lifting for them. If you've registered on the Victron Professional portal with your details and date, that timestamp is your friend — lean on that hard.
A few avenues worth trying:
- Contact Victron UK directly (not just a dealer) — they can often trace the unit's manufacture date and distribution chain from the serial alone
- Bimble Solar, Merlin Equipment, or Elektra are solid UK authorised dealers who've been known to advocate on behalf of customers even for units they didn't sell
- Check if the original seller had a parent company or liquidation process — sometimes warranty obligations transfer
The brutal truth though? Without a purchase invoice, you're essentially asking Victron to take your word for the install date, which some manufacturers will do with supporting evidence (photos with metadata, an electrician's job sheet, etc.).
Anyone else been down this rabbit hole and actually got a result? Curious whether Victron's UK support is as accommodating as their reputation suggests, because my experience has been patchy depending on who picks up the phone.