It's okay once you realize that they are using different electrical groupings of the same cells, and are listing the parallel cell group as if it is one cell of larger capacity.Yeah, I was just looking over their tables and boggling at the wrong-math of their module/voltage calculations.
That example combination isYeah, I understood what they were going for, but it just didn't match my expectations. This line in particular irritated me. 20 modules at 22v nominal for a Hyper9 HV results in way over the allowed max voltage for the inverter without paralleling the modules:
View attachment 126443
The module description specifies a suitable voltage (3.7 V/cell x 2 cells = 7.4 V), but the example has the wrong module voltage - presumably just a typo. 40S @ 3.7 V/cell or 20 modules in series @ 7.4 V/module is the right voltage (148 V nominal, 168 V peak), and that's suitable for HyPer 9HV.11) OXDP 3.55kWh 7.4vdc 2s Spec Order
I just imported their example configurations (for all three Power module sizes: 2.66, 3.55, and 5.3 kWh) to a spreadsheet and ran some checks: the only errors are that the module voltages for types 8 (3.55 kWh 16S) and 11 (3.55 kWh 2S) are incorrectly stated in the example table, in every instance of those modules - that's almost half of the 3.55 kWh examples. The other values (total pack voltage, Ah capacity, number of cells in series, and energy for the stated number of the appropriate module) are all correct (meaning consistent with module specs) even for these configurations.Yep, I feel like they had an intern put together a spreadsheet. Either way doesn't build a ton of confidence...
I agree that it is a systematically assembled range of module options from a single cell size and corresponding set of module stack components.... there is clearly some decent fabrication engineering surrounding whatever their cell supply is. The 'Energy' modules are pretty obviously generic but they spent more time in their engineering and marketing on the 'power' modules. They are appealing for the more varied voltages available and varied sizes, but..