noise
4d6c6c109b
Clear-noon peak (2026-06-24 13:44, HA recorder): each inverter ~4.7kW @ ~300V @ ~16A. A down string reads ~10A; ~16A = both parallel strings live. The "one string down per inverter" belief was from confounded afternoon/rainy samples + transient pv_loss_warning (now off) and is refuted. ~66% of nameplate at peak is explained by 45-deg tilt (wrong for high June sun), heat derate, and tree shading. AND the peak was demand-limited: battery charge pinned at the 120A cap (121A) at 65% SoC with only 3.3kW load -- reversing the earlier off-peak "not clipping" note. Documented the throttle test to resolve true array ceiling before raising max_charging_current. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
73 lines
3.6 KiB
YAML
73 lines
3.6 KiB
YAML
# LVX6048 settings profile — EG4 LifePower4 v2 LiFePO4 bank, open-loop.
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#
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# Designed for: 6× EG4 LP4 v2 100 Ah in parallel (600 Ah, ~30.7 kWh).
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# (Was 3 packs originally; 3 more added — commit 38ac9ca. Values below are
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# unchanged and remain correct for 6 packs — they're only MORE conservative now.)
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# Apply identically to both inverters in a parallel pair:
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# sudo systemctl stop powermon.service powermon2.service
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# ./flash.py apply --device /dev/lvx6048-1 --profile profiles/eg4-lp4-v2.yaml --confirm
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# ./flash.py apply --device /dev/lvx6048-2 --profile profiles/eg4-lp4-v2.yaml --confirm
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# sudo systemctl start powermon.service powermon2.service
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# ./flash.py compare --device-a /dev/lvx6048-1 --device-b /dev/lvx6048-2
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# ./flash.py sync-check --device-a /dev/lvx6048-1 --device-b /dev/lvx6048-2
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#
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# Voltage rationale (16S LFP, 3.2 V/cell nominal = 51.2 V pack):
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# bulk 56.4 V = 3.525 V/cell — long-life sweet spot for LFP
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# float 54.0 V = 3.375 V/cell — rest near mid-knee, avoid sitting on the top
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# stop_charge 54.0 V — grid charges only to ~mid-knee; solar handles the bulk top-off
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# stop_dis 48.0 V = 3.000 V/cell — soft "switch to grid" point
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# cutoff 48.0 V = 3.000 V/cell — inverter hard shutdown floor (BMS still protects below)
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# (Floor reviewed 2026-06-24: deliberately kept at 48.0/3.00 V for cycle-life margin.
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# Lowering to 46-47 V would unlock only a few % of usable LFP capacity and isn't
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# worth the deeper cycling on this large, non-capacity-constrained bank.)
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# Conservative off-grid policy: keep grid as a soft top-up, let solar do the bulk work.
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#
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# Current rationale (600 Ah bank):
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# 60 A/unit × 2 units = 120 A combined ≈ 0.2 C — very gentle on a 600 Ah bank.
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# 30 A/unit MUCHGC keeps grid-charging conservative (60 A combined).
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# Charge-current headroom — REVISIT (corrected 2026-06-24): an off-peak sample
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# (71 A of 120 A) first suggested no clipping, but at the actual solar PEAK (13:44,
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# ~9.5 kW PV) the bank was pinned AT the 120 A cap (121 A) with SoC only 65% and
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# load just 3.3 kW. So at noon the charge cap likely IS throttling harvest. Before
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# raising to 80 A/unit, run the throttle test: on a clear noon, lift the cap (or add
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# load) and see if combined PV climbs above ~9.5 kW (MPPT voltage staying at Vmp). If
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# it does, raise max_charging_current; if PV stays flat, the array is tilt/heat/shade
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# limited (45 deg tilt + trees), not cap limited. See memory project_solar_array_config.
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# enum: AGM | FLOODED | USER
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# USER required to enable the per-cell custom voltages below.
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battery_type: USER
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# V 40.0..48.0 — hard shutdown; must be < stop_discharge_voltage.
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cutoff_voltage: 48.0
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# V 44.0..51.0 — switch battery→grid below this (pair: stop_charge_voltage).
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stop_discharge_voltage: 48.0
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# V 0 (=Full) or 48.0..58.0 — switch grid→battery above this. 0 = let bulk define.
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stop_charge_voltage: 54.0
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# V 48.0..58.4 — CC→CV transition (pair: float_voltage; must be >= float_voltage).
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bulk_voltage: 56.4
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# V 48.0..58.4 — held while on grid (pair: bulk_voltage; must be <= bulk_voltage).
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float_voltage: 54.0
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# A 10,20,30,40,50,60,70,80 — combined solar+AC cap, per unit.
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max_charging_current: 60
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# A 2,10,20,30,40,50,60,70,80 — grid-side cap, per unit.
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max_utility_charging_current: 30
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# enum: solar_utility_battery | solar_battery_utility
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output_source_priority: solar_battery_utility
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# enum: solar_first | solar_and_utility | solar_only
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charger_priority: solar_first
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# enum: battery_load_utility_ac | load_battery_utility
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solar_power_priority: battery_load_utility_ac
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# enum: enabled | disabled (PEI/PDI)
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grid_tie: disabled
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