Grx di2 upgrade

[markyboy]

Hi all I'm currently running grx mechanical and want to upgrade to di2 grx. What parts will I need batteries etc as I already have chainset callipers cassette and so on. I know it's shifters and rear mech but what about the internals?
Thanks in advanced

[TerryDi2C]

Battery: BT-DN110
Charger: SM-BCR2
Junction A: EW-RS910 or SM-EW90 or SC-MT800
Front derailleur (if 2x): FD-RX815
Rear derailleur: RD-RX815 (2x) or RD-RX817 (1x)
Junction B: SM-JC41
Wires: EW-SD50 of the right length.

See https://si.shimano.com/en/pdfs/dm/RX815 ... 02-ENG.pdf

Or my pages:
https://bettershifting.com/building-a-d ... -you-need/
https://bettershifting.com/building-a-d ... nd-wiring/

[markyboy]

Many thanks I'll start looking

[RDY]

If you're already on GRX 8xx mechanical, I wouldn't bother. You'd be far better off dropping the cash on other upgrades, most likely.