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EG4_FAAB-2727
2026-03-29
- Based on FAAB-2626/2525.
- Match LCD V25.
- 1. Improved. New England Grid Profile — added regional grid profile support for New England configurations, with Voltage-Active mode disabled by default.
- 2. Improved. Added RS485 BUS communication support on the Meter485 port for PPL Electric installations.
- 3. Improved. LUMA Grid Profile: Voltage-Active Power mode enabled by default.
- 4. Improved. HECO Grid Profile: Frequency-Active Power mode enabled by default; under-excited reactive power set as default.
- 5. Improved. Optimized charging power limitations when PV power is unbalanced across inverters in a parallel system.
- 6. Improved. LCD phase setting labels updated from R/S/T to A/B, B/C, C/A （LCD V25）.
- 7. Improved. Update fan logic to start fans at a lower temperature to optimize heat dissipation.
- 8. Bug Fixes. Fixed repeated switching between on-grid and off-grid modes on the secondary inverter triggered by off-grid cut-off voltage in parallel shared-battery and lead-acid battery mode.
- 9. Bug Fixes. Reduced probability of repeated state switching between PVBatGridOn and PVChgGridOn.
- 10. Bug Fixes. Fixed the inability to exit on-grid AC couple charging state and switch to battery discharge when load exceeds AC couple power in a parallel system.
Posted : April 6, 2026 7:09 pm
BobAndRoslyn reacted
I’m sure a sigi infant effort was made on the improvements.
Could you find out more specifics on #7 fan logic? on the 12kpv it has been observed to go all on around 6kw.
which temp indicator is this now watching to turn on/off?
Are fans only capable of single full-speed?
It would be kind to not make us run dozens of tests to revers-engineer the fan algorithm.
Posted : April 6, 2026 9:09 pm
Any stats on how many folks have applied this patch? Any feedback from the community?
Posted : April 11, 2026 12:26 pm
For me, it appears that the fans prior to FAAB-2727, they were turning on at ~130 - 140F.
See temperature plot as fans cycle.
After FAAB-2727, they appear to now turn on at 105 - 120F.
So maybe ~ a 10F or more change.
Measurements made through Home Assistant - Temperature Internal sensor.
Posted : April 11, 2026 5:09 pm
And Yes. the fans appear to be able to be ramped and under PWM control. The fan speed algorithm is probably based on an internal heat sink temperature and power being produced. The fan turn on seems to have two different temperatures of where they turn on, again probably based on a heat sink temperature and power produced.
Posted : April 11, 2026 5:20 pm
