New Inverter has stopped the R/C of TV 🤔

[YeoBlade]

I have a new LG TV 230v which was powered by a very cheap ciggy plug in inverter when off grid, however I have now upgraded the OE equipment with a 300ah Li battery and Renogy 3kw inverter. This works fine and tested to 2.5kw without issues on heating/cooking appliances
So plugged in the TV and can't get it to turn on with the remote, pressing actual button on TV and on it comes BUT the R/C wont work or do anything. Plug TV in grid mains or cheapo inverter and works perfectly .
I'm assuming its RFI or similar from the inverter, however even if I keep the inverter powered on but power the TV by another source it doesn't have a R/C problem, so the interference must be transmitted into the TV by the inverter supply ??
I have bought and waiting delivery of a Power Filter for Interference Attenuation in Electrical Appliances.

Any thoughts please our Electronic buddies out there ? @merl @wildebus et al

https://www.ebay.co.uk/itm/127466307923?var=428561661852

PS Just thought I must earth the inverter, maybe

 

[trevskoda]

Why did you not just buy a 12v tv, i have one but had to use a buck voltage converter to lift from 12.7v to almost 14v or no sound on picture.

 

[YeoBlade]

I do have a 12v TV, in the bedroom.(And the remote works )
12v TVs have limited choice and features being generally poorly value for money.

 

[GeoffL]

Just a thought, but I wonder if the new inverter is a smart device (a power saver) that won't supply power to the TV unless it actually 'asks' for it. By turning the TV on at the switch, you're activating the circuit but the TV in a 'standby' state might have been 'put to sleep' by being logically disconnected by the inverter and so won't be able to respond to commands from the remote?

 

[YeoBlade]

It does run the TV fine, functions perfectly except the remote control wont work.
The inverter is a bypass one so grid powered up all working good, but pull the grid power the TV stays on, but the remote control doesn't then operate it .