@Raajpoot Here's a coparisson among different mesh technologies provided by TP-Link. Long story - short, you're aiming Easymesh because Onemesh is a TP-Link proprietary technology. Regarding Archer...

@Zainmahar This may have been caused by the RE lost the connection with your main router wireless network. If it's possible try connecting the RE closer to you main router and test the stability of...

@RMG915 The reason is certainly one of those two but only an electrician can exclude "circuit has been changed in sub fuse board when installing the solar".

@Zainmahar There's no sleep mode in TL-WA850RE. What you can check is if a power schedule is configured:

@MadBga RE700X is Onemesh/Easymesh capable but only when in RE mode. Keep in mind that Onemesh is TP-Link proprietary technology and it's not compatible with other vendors equipment.

@JithuPaul If you can replace your Archer C54 with Archer C64 (at your retailer) you'll solve the problem. The price tag difference is not too big.