dan.fador wrote: ↑
Mon, 11 Jun 2018, 04:11
I just mounted a PIP4048MS 0.8 (2018) whit two series Tesla Model S modules.
Ah. My understanding is that Tesla modules are 6S of a 3.75 V (nominal) chemistry. So two modules in series is 12S. The inverters and therefore our patched firmware works best with 16S or 15S LFP, 24S lead acid, or 14S of most lithium chemistries. So 12S is almost 15% short.
12S x 3.75 is only 45 V. It's not obvious that you can drive full power from such a low voltage. Lower voltage means higher current in the battery and battery-to-bus full bridges.
My problem is param 12, because I would like to set them to 41 but the minimum value is 44. With modified firmware can I set the 12 param to 41?
From the AussieView™ manual
(accessible from the index in the first post of this topic):
b2u  ... V Battery to utility voltage (lower threshold) (volts)
(when out = Sbu or SoL)
LC: 44 to 51 in steps of 1 (46 default)
LF: 46 to 53 in steps of 1 (48 default)
You'd be using the LC version, since it is the lower voltage version of the two versions of patched firmware. So you'd still be restricted to 44 V minimum. The LF version has 46 V minimum, an even worse fit for your application.
Weber and I have no plans for another version of patched firmware, and really no desire to make more work for ourselves if there is no great call for it.
It seems to me that you'd be better off using one third of another Tesla module to get the battery voltage higher, where it is compatible with the hardware.
[ Edit: linked to the AussieView™ manual ]
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.