As usuall trouble comes just before a bank holiday &/or when owner starts playing
The system is strait forward:
grid meter to receive setpoints for charging / discharging
Multiplus 2 GX 48/3000 and
1 pc pytes E-Box 48100
installed and commisioned in April and working fine.
However, for what ever reason the owner started to change the low SOC level. One morning he realized the battery stops discharging and isn’t charging.
A couple of days ago, I got the call, and it took a bit of time to manage remote access and I realized I couldn’t see the BMS within device list of Remote portal.
I switched of Pytes ON/OFF, changed MP2 to charge mode only and back, but the BMS didn’t appeared.
No ALM on Pytes E-Box.
How could I proceed to recover the system ?
Would it make sense to just charge the E-Box with a “stupid” charger, just to make sure a elevated battery voltage con change the situation ?
Any “Reset button” on Pytes E-Box.
At present only a remote connection is available and the owner at side, with a bit of knowledge to assist.
There have been many topics about issues with Pytes. Almost all BMS/firmware related.
Perhaps do a search and if all else fails contact their support.
OGPS
(Ed @ Off-Grid Power Systems - offgridps.com)
5
First, it sounds like you don’t have your low-voltage shutdown on the inverter configured properly. For a Pytes BMS this should be 49V LVD on the Multi but you can get away with 48V. I recently confirmed this by taking my 50kWh E-Box pack down to 48V disconnect on the inverters and 0% SoC. The inverters disconnected but the rest of the system stayed alive.
Second, an external charger should be all you need. Connect the charger and have it ready but not putting out current. Then, have the owner turn turn off the main black switch, wait a few seconds, turn on the main black switch, and then press the red button labeled “SW” just once. Push it and let go. Do you get any lights at all turn on? Start the charger and see what happens. If that doesn’t work then contact support.
You should also update the bootloader and BMS firmware if you haven’t already.
They are the most reliable batteries we sell if properly looked after. But updating FW remotely on the E-Box batteries is a pain. It’s better on the V-series because you only need to initiate the FW update on the master battery and it will handle all the rest. That’s really handy when commissioning systems with large battery banks. Pytes support is good and they can walk you through updating the FW. They’ll even do it for you if you ask.
