July 22, 20232 yr Growatt with their latest rendition of the 5000ES with the 1XX series Firmware now require an RS485 / CAN Hub which the previous versions did not need. Has anyone paralleled these latest versions and where did you get the hub from? Does it have to be a proprietary hub or are there generic RS485 / CAN Hubs in the market? My search so far results in a few places having the 8 port Growatt hubs but all out of stock in SA. In the US at around 30USD, i,e, ~R600 One local out of stock listing nearly R2000. Perhaps a knowledgeable person on this subject can advise if generic ones even exist?
September 28, 20232 yr Neither RS485 nor CANBUS requires a so called HUB, unlike Ethernet they are multidropped on physical layer. So their term HUB is merely a convenient 'breakout box' and plus minus nothing else. EDIT: and i am not in favour of such a 'central hub' as it creates affectively a star connection which is bad for line termination. Ideally, a line must wired to the actual node and then from there to next node and so on and terminated to line impedance at the last node, in order to keep the tail connections as short as possibly can. This is especially important for canbus as the bandwidth is in order of hundreds of kilohertz. Edited September 28, 20232 yr by BritishRacingGreen
December 31, 20232 yr Looking to do something similar, except I have 5 inverters and 4 batteries that need to be considered. At least the batteries have a daisy chain/passthrough connector, but the inverters do not. I found these (https://soundtech.co.za/rj45-ethernet-splitter-2-pack.html): Which should do the trick, I hope. Just make a short pigtail for each inverter, then daisychain ethernet cables from one to the next. Makes it less of a star topology, at any rate. Ideal would be a RJ45 version of this, although this might even work, if the necessary pins are present: That said, it might impinge on any neighbouring connectors, so having a short pigtail is probably a good approach. Edited December 31, 20232 yr by RoganDawes
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