Release Version of Patched Firmware 72.20c for some PF1 models with the 64V option
[Edit1: On 12-Oct-2018 we replaced beta 72.20b here, with beta 72.20c that has a new load-control or go-to-standby command.]
[Edit2: On 11-Nov-2018 we replaced beta 72.20c here, with release 72.20c. The only change was the first letter of the version number (from B to L).]
This patched firmware fixes the premature-float bugs
in the manufacturer's firmware for the PIP-5048MS, Axpert MKS 5K-48 (PF1 with 64V option) and equivalents. i.e. machines supplied with main firmware version 72.xx where xx ≤ 30. It also contains our Dynamic Current and Load Control
(DCLC) and AussieView™
additions, and we have provided a version with our voltage and current threshold changes for LFP cells. i.e. It has the same functionality as 73.00c
(PF0.8) except that in the LFP version, the minimum tail current to go from absorb to float has now been reduced from 5 A per machine to 3 A per machine.
Finally, 72.20c also has Dynamic Load Control (DLC). This allows you to send a serial command (MNCHGC0497) to force a machine into standby mode, reducing its power consumption (in our test with 2 parallel machines, from around 60 W to 11 W per machine). This is similar to turning off the bottom switch, except the processor keeps running so it can accept other commands, such as MNCHGC0498 to return it to normal operation. With no PV or AC input, turning off the bottom switch still powers everything down after about 20 seconds, including the processor. The zero in these commands can be replaced with other machine numbers in a parallel system.
Thanks go to forum contributors and friends @6mdx
for the loan of two PIP-5048MS inverters for testing. Also the anonymous benefactor who sent us the firmware update file. You know who you are. Many thanks to you all.
Here are the zip files with all the software you need, to reflash your PIP-5048MS or Axpert MKS 5K-48 (PF1 with 64 V option), and to revert to factory 72.20 firmware if required.
This firmware is only suitable for the 48 V models with a single low-voltage MPPT and a power factor of 1 (5kW/5kVA) and
the 64 V maximum battery voltage option. It is not
suitable for the older models with a PF0.8 rating (4 kW/5 kVA), and not PF1 models without the optional 64 V hardware, and not models with a maximum PV array open circuit voltage greater than 145 V DC. Parallel or phased machines must all run the same patched firmware version.
For lithium ferrous phosphate (LFP) (16S or 15S)
For lead acid (24S), lithium cobalt-blends (LCO, NMC, NCM, NCA) (14S) and lithium titanate (LTO) (21S)
See these reflashing instructions
but ignore the zip files there.
It should go without saying that you use this at your own risk.
One of the fathers of MeXy the electric MX-5, along with Coulomb and Newton (Jeff Owen).