Hi all. Hope someone can give some advice here. I just installed a 7.2kva Synapse 48volt inverter together with a 5.5kw Hubble battery. I see there is a can port on the battery and a battery port on the synapse inverter. I presume the cable will be a special type as with the pylontech batteries and not a standard ethernet cat5 cable. I did set the parameters as specified by Hubble website manually, thus second question is, is the canbus cable then still required / necessary or better than the manual settings?

Regards

Otto

I was joping someone replied to this...

On 2022/11/17 at 7:34 PM, OttoN said:

I did set the parameters as specified by Hubble website manually, thus second question is, is the canbus cable then still required / necessary or better than the manual settings?

It's a difficult question to answer. The Synapse probably overshoots like the Axperts it is modelled on, so you might find it's a nuisance as the BMS will ask for very close to the very limit of its operating voltage, the inverter overshoots, the battery disconnects, and things go crazy.

But maybe the Hubble doesn't ask for such high voltages, or the Synapse doesn't overshoot so badly. In theory, it IS better to have the cable, since one cell can go over-voltage, and the BMS can tell the inverter to wind down the charge current to keep it from overcharging. When that cell balances with the others, the BMS can ask for more voltage.

The Hubble is NMC chemistry, which I think is less sensitive to over-voltage as well. So it's probably worth doing the extra research to find out whether the Synapse supports the Hubble protocol, and what pinouts the cable will need.