when we get power fluctuations ie power cuts out for a few seconds it is enough to operate the backup switch, but when it does it immediately trips the RCD device in the garage why?
it means that my system will not automatically switch to battery back up in the event of a power cut.
This post from Dave can help you, can you post up a picture of the circuit breaker (as seen above his post here)
viewtopic.php?p=16531#p16531
viewtopic.php?p=16531#p16531
As requested see photos.
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Seems like a 30mA RCD to me, so Dave or Will can confirm if you might need that changing to 100mA (as per Fox recommendations)
Thanks for the info MaterialBarracuda48, will now go and shout at my installers OVO Energy! but do have to say they were brilliant at the install very neat and tidy and everything works, just it seems this one glitch.
The RCD rating question is what caught my attention. I have a Fox ESS setup with the EPS backup gateway on order for a mountain property outside Denver, where outages are common in winter. My installer spec'd a 100mA type A device, but I want to confirm that's what actually lands in the panel before signing off. Switching it later means another permit inspection and a callback fee. The equipment list at Best Emergency Backup Power of 2026 is at least useful for comparing gateway options. Has anyone here had an installer swap the RCD after the fact, and did it affect their warranty?