teba wrote: ↑
Fri, 17 Apr 2020, 13:59
I think about down-upgrading the firmware of my inverters to version 72.20e
Of course, you realise that you would be missing out on whatever improvements are present in factory 72.30 as opposed to factory 72.20.
My problem is: I don't have access to a windows machine. I think about using the windows emulator
for flashing the firmware.
I use Windows myself, so I've not tried it. But I can't see why it would not work.
What does this ReflashTool_AxpertHV64V.exe exactly do?
It sends special commands to the inverter-charger, essentially sending the hex file in bits and pieces with checking.
Could I achieve this with another (unix) tool too?
No. It's complex enough that it's not worth attempting this.
Many thanks to coulomb and weber for this great achievement and especially for making the result available!
Thanks, good to know we're appreciated.
One more question: My inverters are not or only partial reachable when the mppt (SCC-board) has a lot to do. I often get timeouts or uncomplete answers via the serial line at high noon. Is this normal? Do you have such experiences too? Or is this the price I pay for buying this cheap brand?
I'd suspect temperature more than overload from the SCC processor. The SCC processor only communicates with the DSP at 2400 bps, or about 4 ms between characters. The DSP can execute some 10⁵ instructions in that time. A command likely arrives only every second or so; it's not likely to trouble the DSP.
My guess, confimed slightly by faint memory of others having this problem, is that it could be the temperature of the communications board. If so, it's worse at noon not because it has more to do, but because it's hotter. Some communications boards seem marginal at best sometimes. When it's playing up near noon, try squirting the comms board with a "can of cold" to see if it comes good. I suspect that the opto couplers are sometimes a bit slow or low gain. It might be worth replacing the opto isolators on the comms board with better spec replacements.
Better yet, since you have two comms boards, swap them, so that you are using the good one for serial commands (assuming you didn't get two bad ones). This is more easily achieved by talking to the other inverter-charger's serial port. [ Edit: I mean, simply plug the RJ-45 plug into the RJ-45 socket for the other inverter-charger. ] All the commands should work just as well from one or the other (i.e. master or slave should not matter).
I note that while commands operate at 2400 bps, the reflash tool switches the serial communications to 9600 bps for most of the reflashing, so if the board is marginal at 2400 bps, it may be so poor at 9600 bps as to not be reliable or even usable at all. I don't believe that this is because of the EASun brand; many of the PIP/Axpert/Other branded Voltronic Power inverter-chargers seem to have this problem. It's just the luck of the draw, sadly.
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.
160 W solar, 2.5 kWh 24 V battery for lights.
Patching PIP-4048/5048 inverter-chargers.