Hello,
With the Pytes V5a, the maximum charging current (CCL) is sometimes already reduced to CCL/V5a = 5A at 65% SOC.
If you then discharge briefly - and then charge again, it works again for a while with a higher charging current.
Initially, my assumption was that this was caused by the ambient temperature - as we have not seen this behaviour with other installations (- but with Pylontech,) I have never seen these problems with Pylontech!
But this happens partly independent of the temperature (min. temp. of the storage tank 13 °C as well as 17 °C, 19 °C, 21°, 22°)
e.g.: System with 3 pcs. Multiplus II / 5000 and 4 pcs. V5a
At 54.23V, 64.4A and SOC 66% → the CCL was reduced to 20A -->> i.e. to CCL/V5a = 5A.
This reduction comes from the Pytes BMS.
(Also occurs in systems with 6 V5a units …)
It makes sense to reduce the maximum charging current to 90%. (This is also how Pylontech does it)
I have found a temporary workaround:
If you generally reduce the max charging current by Victron to around 20A/V5a, then the max charging current by Pytes is reduced at 75/80/90%.
Is there a workaround?
Is this a known problem with Pytes?
LG
MPS