Release Version of Patched Firmware 73.00b
[Edit: This post was originally for the beta version of 73.00a, but after being in use for 6 weeks, and being downloaded 38 times for LFP and 55 times for other chemistries, we updated the zip files to "release" status. Then a few days later we learned about a problem where 73.00 (both original and patched) would stop working after 60 days (with fault code 90) when run on older hardware. 73.00b fixes that problem. It was a one-word change, so we didn't bother with a beta.]
Weber and I have finally finished testing our patched firmware based on factory firmware version 73.00. Hardware that comes with factory firmware 73.00 has a neutral to earth relay, which is active only when the inverter is in battery mode. 73.00 also modifies the behaviour of the fans, spinning the fans even at no load, and more vigorously during heavy solar charging. There may be other improvements as well. 73.00 is parallel compatible with some older firmwares: 52.30, 72.40, and 72.6X, but not
This patched firmware has all the same patches as 72.70c
and earlier patched firmwares, including Dynamic Current Control
. Naturally, this includes fixing the infamous premature float bugs
As before, there is an LFP (Lithium Ferrous Phosphate) version, and the "all other chemistries" version (LC for Lead aCid, Lithium Cobalt blends, and lithium titanate).
This firmware is only suitable for the 48 V models with a single low-voltage MPPT and a power factor of 0.8 (4 kW / 5 kVA), not those with dual or triple MPPTs or a power factor of 1.0 (5 kW / 5 kVA), and not those with a maximum PV array open circuit voltage greater than 145 V DC.
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)
Note: Lithium ferrous phosphate (LFP) is the same as lithium iron phosphate or LiFePO₄. The name "lithium ferrous phosphate" is preferred, as it avoids the confusion between "iron" and "ion".
For details on reflashing, and what hardware this firmware will and won't run on, see the 72.70b reflashing instructions
, but ignore the files there.
[ Edit: Links to text files for DCC and AussieView™ ]
Learning how to patch and repair PIP-4048 inverter-chargers and Elcon chargers.