parrafin23 wrote: ↑Thu, 01 Apr 2021, 16:08
My supplier told me that the com lead should not be longer than 1meter, Why do they supply with a 2meter one?
It's 2400 bps. Any slower and it would go backwards. Comms cable length isn't an issue, within reason.
That did no difference at all. They told me that the version of watchpower i use (1.14SP5) is the wrong version and that version iss not made by them. They sendt me 1.07 to try out.
Huh. That's nuts.
Got a new unit a few days later, The first thing i did check was the serial number, I did comare it to the old one and its the same serial.
Was the serial number all 5's and 3's, starting with 553? If so, it means that a proper serial number is not written to the EEPROM. You might even get a visit from fault code 90 in the future. Some clones come like this.
This "new" unit has the same Fw So i wanted to check if I could update it, but no, it even fails to communicate with it, the com port is avalible.
Some clones can't be updated at all. But to be fair, until you have sorted out the comms issues, firmware updating is not an option. Firmware updates operate at 9600 bps, 4x the speed of commands and responses.
Id like to try and find where the ic where the firmware is stored so i try to remove the ic from the pcb, make a backup of it and flash new firmware to it manualy.
Is this viable to do?
The firmware is stored in a Texas Instruments DSP chip, and is password protected. Even if you had the password, you'd need special JTAG hardware with the 14-pin plug. So sadly, this is not viable. What firmware version is it, as a point of interest?
says that someone fixed their comms/reflash issues by replacing the opto-couplers in the communications board. So that's a possible option if you really want to fix it yourself.
But first, I think you should probably decide Do I Own a Clone?
If you do, it may not be worth attempting to fix the comms issues; who knows what parts are in there?
Nissan Leaf 2012 with new battery May 2019.
5650 W solar, 2xPIP-4048MS inverters, 16 kWh battery.
1.4 kW solar with 1.2 kW Latronics inverter and FIT.
Patching PIP-4048/5048 inverter-chargers.