The base rbr850 is connected to a router via ethernet. does the satellite rbs850 need to connect to the rbr850 via wifi or can i use ethernet?

You should be able to add an ethernet cable for backhaul. I would suggest it, use CAT6 would be best. Backhaul wiring is going to be faster than Wifi backhaul signal. CAT6 cabling is rated for 1gb and PoE. Also, the cabling type being installed for the last few years in new homes with digital ready feature. Also, cabling length you don't go over 100 meters or 328 feet. I usually stop cabling at 300ft. 300ft is a 100 yd football field. Unless your in a mansion cable length isn't a worry. Your best speed on wifi will come from the base router, it is the first hop from your home network to the internet provider equipment. When you add more satellites (which are extenders) your going to be adding the first close to the mesh router just within range to get it's signal. Your next one you would connect within range the 1st satellite. You'll see they talk about coverage of square feet, and not to exceed to so much sq. feet on a system. Because your satellites are drop on signal quality the further away you are from the router. MESH systems are good for small homes, where you can get by with a mesh router and one or two satellites. The best configuration is get the router centered in the house, you can always run a cable from the ISP modem to the router. Then set your satellites in range of the router, not in range of satellites. You'll have a better and stronger setup with Wifi signal as backhaul. You can improve that backhaul and speed to satellites by wiring them to the router or switch that is connected to router.

Do you have to use the Orbi router, or can you use the Orbi satellites with an Xfinity router?

I have the RBK 853 system in my home. I am pretty sure if you want to run Orbi satellities you need to have the main Orbi router to take advantage of the excellent wifi 6 mesh features of the Orbi system. This last weekend I helped a friend with an Xfinity modem / router box combination install an Orbi system. Just connect the main Orbi router via ethernet cable and sync the satellites. Boom fast wifi everywhere first floor, second floor, basement, attic even out in the yard. Just spend the money you will never look back. Assumes you buy the fast internet connection from Xfinity of course.

I purchased the rbr50 and two rbs50’s right before the release of this rbk852 bundle. :-/ what’s the most cost effective way to incorporate the 852?

Be careful, one series of orbi may not be compatible with another series. Stick with the rbr50's.

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🚀 Elevate your home network to pro-level speed and security—because buffering is so last decade.

ROBUST SECURITY SUITE - Stay protected with NETGEAR Armor’s real-time defense against hackers, malware, and identity theft.
EXPANDABLE MESH NETWORK - Add satellites to extend coverage by 2,500 sq.ft. each—perfect for growing smart homes and offices.
PLUG PLAY ETHERNET PORTS - Connect wired devices effortlessly with 4 Gigabit Ethernet ports on both router and satellites for ultimate flexibility.
NEXT GEN WI FI 6 PERFORMANCE - Experience lightning-fast AX6000 speeds up to 6Gbps for flawless streaming, gaming, and conferencing.
SEAMLESS WHOLE HOME COVERAGE - Blanket your space with ultra-fast WiFi across 7,500 sq.ft., supporting up to 100 devices without a hitch.

The NETGEAR Orbi RBK853 is a premium tri-band WiFi 6 mesh system delivering up to 7,500 sq.ft. coverage and supporting 100 devices simultaneously. With AX6000 speeds up to 6Gbps, built-in NETGEAR Armor security, and easy expansion via satellite extenders, it’s engineered for seamless, ultra-fast connectivity and robust protection in modern smart homes and professional environments.

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Standing screen display size	7 Inches
Wireless Type	802.11ac, 802.11ax
Brand	NETGEAR
Series	RBK853-100NAS
Item model number	AX6000
Operating System	RouterOS
Item Weight	2.86 pounds
Product Dimensions	10 x 2.8 x 7.5 inches
Item Dimensions LxWxH	10 x 2.8 x 7.5 inches
Color	White
Voltage	100240 Volts
Manufacturer	Netgear
ASIN	B082LZKYFL
Is Discontinued By Manufacturer	No
Date First Available	January 6, 2020

NETGEAROrbi Whole Home Tri-Band WiFi 6 Mesh Network System (RBK853) – Router with 2 Satellite Extenders, Security Features, Coverage Up to 7,500 Square Feet, 100 Devices, AX6000 (Up to 6Gbps)

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