356 Volt lithium battery home power:
There appear to be two approaches to using a Kona EV 356 Volt lithium battery pack to
directly power your home off-grid (disconnected from public utility power) without the limitations of the 12 Volt "starter" battery.
1. Can the 356 Volt lithium battery (or modules from it) be connected to the MPPP input (normally used for a solar PV string) of a solar inverter like that made by SolArk or Solis? A DC switch would be needed to disconnect the battery from the inverter for charging.
or
2. Will one of the following high-voltage solar inverters provide
7.6 to 11.4 kW of power to a home with the 356 Volt lithium battery from a Kona, as well as charge the battery?
Solis S6 7.6kW Single Phase High Voltage Energy Storage Hybrid Inverter | S6-EH1P7.6K-H-US -CCA-RGM| 4 MPPT
https://signaturesolar.com/solis-s6...31bbe4fb6063125a29394&utm_content=Ad group #1
or
Solis S6 11.4kW Single Phase High Voltage Energy Storage Hybrid Inverter | S6-EH1P11.4K-H-US-CCA | 4 MPPT
https://signaturesolar.com/solis-s6...917a0f3b803dbe3e82319&utm_content=Ad group #1
The above Solis inverters are compatible with up to 2 of either of the following Gen 3 lithium battery packs from LG Energy Solutions:
RESU Prime 10H 10 kWh (1 rack) 10kWh (1 rack)
RESU Prime 16H 16 kWh (1 rack) 16 kWh (1 rack).
https://signaturesolar.com/content/...ster_Product_Compatibility_PE-CP-0004-R00.pdf
The Kona 64 kWh RESU battery was originally made by LG Chem until they changed their name to LG Energy Solutions after battery problems were resolved and installed in Kona EVs from March 2021 forward.
Questions:
A. Are the RESU battery packs in the Kona EV (from March 2021 forward) the same chemistry as the LG Energy Solutions RESU Prime 10 H and 16H specified for the Solis inverter? Do they charge in the same way?
B. How does one rearrange the 5 battery modules in the 64 kWh Kona EV battery pack into four 16 kWh modules:
Two 16 kWh battery packs power the house through the Solis inverter.
The remaining two 16 kWh battery packs may be set aside, or charged (elsewhere or by solar PV), or connected to the MPPP solar PV inputs of an inverter.
C.
Can the Kona EV battery pack successfully communicate (via RS422, CAN bus or other connection) with a Solis inverter after the Kona battery pack has been divided in half or in quarters to match Solis inverter spec? How can we determine if this works, or make it work?
Further assistance:
In 2022, Solar Guppy confirmed the following CAN battery communications between a high voltage battery and Solis app battery settings:
"I can also confirm that if your HV battery ( or bms ) can do this protocol selected as "Lithium battery HV" from the Solis app battery settings you will have full CAN battery communications. There are of course plug and play options, like the Pylontech H1 or BYD HVL that meet UL9540."
https://diysolarforum.com/threads/inverters-that-support-high-voltage-500v-storage-batteries.85751/
And Solar Guppy referrenced the following protocol:
"CANBUS Protocol of High Voltage system"
https://www.studocu.com/ro/document...ocol-sermatec-high-voltage-v11810k-w/68978391
The process of setting up BMS (Battery Management System) communication between your SOLIS inverter and compatible batteries is shown, with video photography inside a Solis inverter, in the following youtube (Google translate may be used on the transcript) by ionFlux Solar.
SOLIS Inverter BMS Communication with Lithium Battery | Step-by-Step Guide
Oct 27, 2024
"In this video, I guide you through the process of setting up BMS (Battery Management System) communication between your SOLIS inverter and compatible batteries. Learn the essential steps to ensure efficient power management, optimize battery usage, and enhance system reliability. Whether you're an installer or DIY enthusiast, this guide will help you maximize your solar setup's performance. Don't forget to subscribe for more solar installation tips and solutions!"
If "Lithium battery HV" is set in the Solis app, will the Solis high-voltage inverter function with the Kona EV battery (subdivided into two 16 kWh modules)? What else is involved?