@Will - this battery type appears to be missing from your (most useful) spreadsheet in the locked thread?
Fox ESS H1-6.0-E-G2-WL Firmware - Master: 1.40 Slave: 1.04 Manager: 1.26 Datalogger (internal wifi) : 2.06
Fox ESS ESC 2900-H4 Cube Battery - Master plus 3 Slaves - All V2 - 11.52kWh Firmware - Master: 2.002 All Slaves : 1.13
430w Jinko JKM430N-54HL4R-B all black panels (2 strings of 6 - SW facing) - 5.16 kWp
Myenergi Zappi
Octopus Intelligent Go tariff
Fox ESS Inverter firmware as suppled with replacement inverter/awaiting update Nov 2025
Fox ESS Battery Firmware updates applied Feb 2025
Fox ESS ESC 2900-H4 Cube Battery - Master plus 3 Slaves - All V2 - 11.52kWh Firmware - Master: 2.002 All Slaves : 1.13
430w Jinko JKM430N-54HL4R-B all black panels (2 strings of 6 - SW facing) - 5.16 kWp
Myenergi Zappi
Octopus Intelligent Go tariff
Fox ESS Inverter firmware as suppled with replacement inverter/awaiting update Nov 2025
Fox ESS Battery Firmware updates applied Feb 2025
Site Admin
Morning Jim,
Thanks, I can see where I went wrong in the sheet, now corrected to simply ECS V1 or V2.
To answer you, these are the battery firmwares:
Battery ECS V2 BCU (Master) 2.009
Battery ECS V2 BMU (Slave) 1.15
Latest inverter:
Inverter H1 Gen2 Master 1.45
Inverter H1 Gen2 Slave 1.04
Inverter H1 Gen2 Manager 1.62
If you're interested in having me manage your firmware, I offer this as a service here: https://ecclessolar.com/digital-services/
Thanks, I can see where I went wrong in the sheet, now corrected to simply ECS V1 or V2.
To answer you, these are the battery firmwares:
Battery ECS V2 BCU (Master) 2.009
Battery ECS V2 BMU (Slave) 1.15
Latest inverter:
Inverter H1 Gen2 Master 1.45
Inverter H1 Gen2 Slave 1.04
Inverter H1 Gen2 Manager 1.62
If you're interested in having me manage your firmware, I offer this as a service here: https://ecclessolar.com/digital-services/
Community Admin / FoxESS Elite Professional
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Fox ESS Tri Inverter Installation
2 x KH Hybird Inverters (Parallel Mode)
1 x H1 Gen1
24 x HV2600 (62.4kWh)
32 x 490w across 4 arrays
Dual Tesla Household
Heatpump & Low Carbon Housebuild
Did I help you? Feel free to leave me a tip Book a zoom meeting for remote consultancy or help Switch to Octopus and earn £50 Get a heatpump from Octopus and earn £100 Subscribe to my YouTube channelFox ESS Tri Inverter Installation
2 x KH Hybird Inverters (Parallel Mode)
1 x H1 Gen1
24 x HV2600 (62.4kWh)
32 x 490w across 4 arrays
Dual Tesla Household
Heatpump & Low Carbon Housebuild