Deye Firmware Collection

Disclaimer

This repository is a private hobby project and is intended solely for informational and archival purposes. It contains a collection of firmware files and related resources for Deye inverters.

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Installing, modifying, or using firmware obtained from this repository may void warranties, guarantees, service agreements, or support entitlements provided by the manufacturer, distributor, installer, or reseller.

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Purpose of This Repository

The sole purpose of this repository is to archive and preserve firmware versions and related information for research, educational, historical, and hobbyist use.

Nothing contained in this repository should be interpreted as a recommendation to install, modify, or use any specific firmware version.

LV Firmware — Known infos about Versions, Bugs, Fixes, Issues,...

Main Firmware (MCU)	HMI Version	Known Issues & Bugs	Fixes & Characteristics	Recommended Action	Status & Notes
1128	C037	Throttles/limits power in grid-parallel (AC-Couple) and GEN-Port operation.	—	Upgrade to newer firmware	User tested
1132	—	Caused battery charging issues for some users.	Quiet fan behavior in Bypass/NoBatt mode (up to 114x).	Upgrade to a stable version	Community reported
1135	C037	Zero Export via Modbus is setable to negative but oscillates / unstable. BMS errors reported on some setups.	Last version supporting negative feed-in / Zero Export. Overall reported as stable. Quiet fan behavior in Bypass/NoBatt mode.	Recommended baseline (Use if negative feed-in is required)	Community favorite
1140	C037 / C043	Differences between C043 and C044 remain unclear.	Overall stable. Quiet fan behavior in Bypass/NoBatt mode. See also here	Keep if running stable	Factory default on some units
1144	C037	No LoRa support; no negative grid draw support.	Last version that properly nets/balances phase power under heavy phase imbalance (Zero Export). Supports up to 6 kW per phase in off-grid mode. AC-Couple: No power limiting in grid-parallel mode. GEN-Port: Limits to nominal inverter power (e.g. 12 kW) with 2nd inverter. Quiet fan behavior.	Recommended for grid-parallel, unbalanced loads & Felicity setups	User tested / Stable release
1145 (AT)	—	Grid Code Bug: Cannot save German VDE4105 profile (reverts continuously to Austrian OVE Directive R25).	Contains Austrian grid profiles.	Do NOT use in Germany. Austrian users should prefer newer versions.	Highly problematic for DE
1147	C037	Reported as problematic for DE; initial AT release was unrefined.	AC-Couple: No power limiting in grid-parallel mode. GEN-Port: Limits to nominal inverter power (e.g. 12 kW) with a 2nd inverter.	Avoid / Upgrade to 1150 or newer	User tested / Community warnings
1150	C044	Some reports about disappeared Serial Number (SN).	Significantly improved over 1147 for Austrian users.	Upgrade if you encounter issues	Improved AT build / Outdated elsewhere
1151	C04D	max. Solar sell was limited to 12KW	AC-Couple & GEN-Port: Limits power to 2x nominal inverter rating. See also here	Monitor community feedback	User tested / Official Deye DE release
1170	—	A possible 12-kW-Limit-Bug	See also here	—	—
1172	C050	Zero Export Bug reported on some setups. Poor/sluggish regulation when using "MI Input", "AC Couple on Grid Side", or "AC Couple on Load Side".	1172/C050 combination described positively by some users without AC Coupling;	Test Zero Export / AC-Couple behavior if installed	Mixed reports / Reportedly recalled initially
1175	C070 / C071	—	Rock-solid release. Considered stable benchmark. Required for LoRa Wallbox. Supports AC-couple via Meter2 while keeping GEN port free for a diesel generator (stable operation without power/signal fluctuations). See also here	Highly Recommended	Factory installed on newer units / Confirmed stable
1183	—	Contradictory / Pulled Back: F23 errors (every 10 min to 2-3x/day); negative Zero Export setable on LCD but ineffective; config wiped on update; higher idle consumption (+0.3 kWh/day).	Supposedly fixed recurring faults and allowed negative Zero-Export on LCD.	Avoid (Reportedly recalled by support due to customer issues)	Unstable / Contradictory reports
1184	—	Contradictory: Reports of persistent F55/F21 errors on SUN-15K; battery won't load via Grid or PV; HMI reboot when opening settings menu (with C05F); config wiped on update.	Support claims F23 bug from 1183 is resolved.	Exercise caution / Await stable feedback	Unstable / Contradictory reports

Additional infos you may find in the LV MCU Wiki or the HMI/MCU Bundles Wiki

LV HMI Versions — Known infos

HMI Version	Known Issues & Bugs	Characteristics & Capabilities	Recommended Action	Status & Notes
C037	—	Highly popular and reliable baseline HMI. Widely used in combination with multiple stable MCUs (1135, 1140, 1144).	Recommended baseline HMI. To be used if no newer features are needed	Community favorite / Confirmed stable
C03E	Reportedly drops support for Felicity battery storage. Contains no LoRa/Smart Device menu.	Found on newer Deye 12K units.	Exercise caution with Felicity batteries	Unconfirmed community report
≥ C042	Menus automatically lock after a period of inactivity.	—	Enter 7777 to unlock settings menu	Introduced in C042
C050	Factually a downgrade from C05E. Paired with MCU 1150 on new units reported temps >70 °C.	Contains LoRa / Smart Device menu.	Monitor temperatures if paired with MCU 1150	Confirmed LoRa menu
C051	Lacks LoRa support.	Good alternative build; works well in combination with MCU 1175.	Good pair for MCU 1175	Plausible
C057	—	Delivered stock / factory default together with MCU 1172.	—	Factory default build
C059	Base build responsible for stuck/hanging MCU1 updates.	—	Upgrade HMI if MCU updates get stuck	Unstable baseline
C05E	Lacks LoRa / Smart Device menu.	Stated as current by support when paired with MCU 1175.	Recommended pair for 1175 (without LoRa)	Confirmed
C05F	Buggy: Causes HMI reboot when opening the settings menu (reproducible with MCU 1184).	Introduced by support for fault resolution (paired with MCU 1183).	Avoid / Upgrade to C071	Unstable HMI release
C070	Does not allow setting negative values. No internal inverter statistics maintained/logged.	Prerequisite for SmartTX / LoRa Wallbox app setup.	Upgrade to C071 if negative values or statistics are required	Confirmed
C071	—	Solid HMI. Runs reliably and stable. Prerequisite for SmartTX / LoRa Wallbox.	Recommended HMI version	Confirmed stable
C072	Associated with configuration loss issues when paired with MCU 118x.	—	Avoid when running MCU 118x	Confirmed

Additional info you may find in the LV HMI Wiki

HV Firmware — Known infos about Versions, Bugs, Fixes, Issues,...

Main Firmware (MCU)	Device / Series	Known Issues & Bugs	Fixes & Characteristics	Recommended Action	Status & Notes
1087 / 1091	HV Hybrid (AC-Couple / BKW)	—	Frequency shifting at 0 A charge current works properly. 1087 is considered the last stable "mainstream" release.	Do not update intentionally if running well	Community baseline
< 1095	HV Hybrid	MPPT Bug: Severe power drop during hot afternoons (lasting 2–3 hours).	—	Upgrade to ≥ 1095	Unstable MPPT
≥ 1095	HV Hybrid	Unplausible portal values reported by some users (downgrades sought, but old files unavailable).	Fixed the MPPT temperature power drop issue.	Keep if MPPT fix is required	Plausible
1110	HV Hybrid (LoRa Systems)	No LoRa Support: Does not work with LoRa modules (requires F094 for LoRa).	—	Avoid if using LoRa	Plausible
1150	HV Hybrid	Zero Export Bug: Continuously imports and exports grid power instead of holding stable at 0 W. High temps (>70 °C) when paired with HMI C050 on new units.	Downgrading MCU does not break LoRa (LoRa depends solely on HMI).	Avoid C050 + 1150 combination; monitor thermal behavior	Not recommended for new units

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