{ "meta": { "title": "D-Central — Off-Grid Power Components for Mining", "description": "12 balance-of-system components for off-grid Bitcoin mining: battery chemistries, inverters, charge controllers and generators with specs, cycle life, efficiency, best mining use and an illustrative cost band. Canadian cold-climate lens.", "generated": "2026-06-21T14:10:52+00:00", "version": "1.0", "license": "https://creativecommons.org/licenses/by/4.0/", "license_name": "CC BY 4.0", "source": "https://d-central.tech/off-grid-power-components/", "record_count": 12, "provenance": "The D-Central Mining Bible covers ASIC-INTERNAL power (PSU/PIC/DC-DC), not off-grid balance-of-system; every figure here rests on cited public industry references, not Bible-verified.", "disclaimer": "ALL cost bands are rough 2026 CAD order-of-magnitude ranges for sizing intuition ONLY -- real pricing varies 2-3x by brand, capacity, certification and import; never a quote. Cycle-life/efficiency/density are typical RANGES across the class; check the manufacturer datasheet for any specific unit. Sodium-ion figures are EMERGING (2025-26) with thin long-term field data; no Na-ion cost is published. ASIC PSUs prefer PURE SINE inverters. This is a PLANNING reference, not electrical-code or engineering sign-off -- size and install to local code with a qualified electrician." }, "rows": [ { "id": "battery-lifepo4", "category": "battery_chemistry", "type": "LiFePO4 (LFP)", "key_specs": "Nominal 3.2 V/cell; energy density ~100-160 Wh/kg; usable DoD 80-100% (commonly rated 80-90%)", "cycle_life_or_durability": "~3,000-6,000+ cycles to ~80% capacity (more at shallow DoD; ~8-12 yr daily cycling)", "efficiency": "Round-trip ~95-98%", "use_case_for_mining": "Default stationary off-grid/solar storage buffer for a miner; safest chemistry for indoor/enclosed mining sites; handles daily deep cycling", "cost_band_CAD_caveated": "~$300-600/kWh (declining; CAVEAT - varies widely)", "notes": "Very stable cathode (low fire risk). KEY LIMIT for Canada: standard LFP CANNOT charge below 0 deg C without an internal heater or low-temp variant (discharge OK to ~-20 deg C).", "source": "BigBattery 2022 LFP-vs-NMC; Sunlith Energy LFP-vs-NMC lifespan; cellsaviors LFP/NMC comparison" }, { "id": "battery-nmc", "category": "battery_chemistry", "type": "Lithium NMC (Ni-Mn-Co)", "key_specs": "Nominal ~3.6-3.7 V/cell; energy density ~150-220 Wh/kg (highest of the four); usable DoD 80-90%", "cycle_life_or_durability": "~1,000-3,000 cycles to ~80% (shorter than LFP, esp. at deep DoD)", "efficiency": "Round-trip ~95-97%", "use_case_for_mining": "Weight/space-constrained or mobile setups; generally NOT preferred for stationary mining vs LFP on safety + longevity grounds", "cost_band_CAD_caveated": "~$250-500/kWh (CAVEAT - varies)", "notes": "Higher energy density but lower thermal-runaway threshold (greater fire risk) than LFP. Trade density for safety only when space-bound.", "source": "BigBattery 2022 LFP-vs-NMC; EcoTree Lithium NMC-vs-LiFePO4; cellsaviors comparison" }, { "id": "battery-lead-acid", "category": "battery_chemistry", "type": "Lead-acid (AGM / Gel / Flooded deep-cycle)", "key_specs": "Nominal 2.0 V/cell (12 V = 6 cells); energy density ~30-50 Wh/kg; recommended DoD ~50% to preserve life", "cycle_life_or_durability": "~200-1,200 cycles (avg AGM ~500 @ 50% DoD, premium AGM/gel ~1,000-2,000 @ 50% DoD; flooded varies)", "efficiency": "Round-trip ~80-85%", "use_case_for_mining": "Lowest up-front capex / infrequent backup; POOR fit for daily deep-cycling mining loads (low usable depth, low $/usable-cycle value)", "cost_band_CAD_caveated": "~$100-250/kWh up-front (lowest capex, highest lifetime $/usable-kWh; CAVEAT)", "notes": "Heavy; flooded off-gasses (ventilation). Cheap to buy, expensive to cycle. Gel offers best cycle life of the three; AGM is sealed/maintenance-free.", "source": "Clean Energy Reviews lead-acid deep-cycle; BatteryStuff AGM-vs-gel; DIY Solar Forum 50%-DoD thread" }, { "id": "battery-sodium-ion", "category": "battery_chemistry", "type": "Sodium-ion (Na-ion) — EMERGING", "key_specs": "Nominal ~3.0-3.1 V/cell; energy density ~75-160 Wh/kg (CATL Naxtra 175 Wh/kg, mass-prod early 2026); DoD ~90-100%", "cycle_life_or_durability": "Academic/field typical 1,500-3,000 cycles; vendor claims up to 10,000+ (CATL) [FLAG: claims unverified long-term]", "efficiency": "~90-92% [FLAG: limited field data]", "use_case_for_mining": "Best emerging fit for COLD-CLIMATE off-grid (Canada): unlike LFP it charges in deep cold; charges to ~-30 deg C with ~90% retention at -20 deg C (CATL claims). Availability still ramping in 2026.", "cost_band_CAD_caveated": "Projected at/below LFP at scale (no lithium/cobalt); pack-level retail pricing NOT yet broadly available [FLAG - do not quote]", "notes": "No scarce lithium/cobalt -> supply-chain sovereignty angle. Trade-off: lower energy density and immature pack ecosystem today.", "source": "Wikipedia Sodium-ion battery; CATL Naxtra (2025 launch / 2026 mass-prod); IDTechEx Na-ion 2025-2035; Wiltson Na-ion vs low-temp LFP" }, { "id": "inverter-off-grid", "category": "inverter", "type": "Off-grid (standalone) inverter / inverter-charger", "key_specs": "DC battery -> AC loads, NO grid needed; pure sine wave, THD typically <3-5%; surge rating ~1.5-2x continuous", "cycle_life_or_durability": "N/A (electronic; rated by continuous + surge watts)", "efficiency": "~90-95% conversion", "use_case_for_mining": "True off-grid mining site running purely on battery/PV; pure-sine recommended for ASIC PSUs", "cost_band_CAD_caveated": "Sizing-dependent (CAVEAT - scales with continuous-W rating)", "notes": "Cannot grid-export. Match surge rating to any motor/compressor inrush (2-6x). For ASIC-only loads (no motors) surge needs are modest.", "source": "SUG New Energy pure-sine vs off-grid hybrid; EPEVER on/off/hybrid inverters; Aforenergy off-grid inverter guide" }, { "id": "inverter-hybrid", "category": "inverter", "type": "Hybrid inverter (PV + battery + optional grid)", "key_specs": "Combines solar input, battery charge/discharge and optional grid in one unit; can ISLAND during outage", "cycle_life_or_durability": "N/A (electronic)", "efficiency": "~94-98% conversion; round-trip ~92-97% (single DC-DC + DC-AC path)", "use_case_for_mining": "Most flexible: solar-plus-storage mining that can run behind-the-meter, island on outage, or arbitrage grid. Best general choice for grid-adjacent off-grid.", "cost_band_CAD_caveated": "Sizing-dependent; higher than a plain string inverter (CAVEAT)", "notes": "Eliminates need for a separate battery inverter. Highest configuration flexibility of the three inverter classes.", "source": "SurgePV hybrid-inverter guide 2026; EPEVER inverter types; SUG New Energy" }, { "id": "inverter-string-gridtie", "category": "inverter", "type": "String (grid-tie) inverter", "key_specs": "DC PV -> AC for immediate use / grid export ONLY; NO battery management, NO islanding", "cycle_life_or_durability": "N/A (electronic)", "efficiency": "~96-98% (highest pure DC-AC conversion)", "use_case_for_mining": "Grid-tied solar OFFSET of a behind-the-meter miner; NOT for true off-grid (needs a grid reference to operate)", "cost_band_CAD_caveated": "Lowest of the three inverter classes per watt (CAVEAT)", "notes": "Highest raw efficiency but no autonomy: dies when the grid dies. Include only for grid-tied-with-solar mining economics.", "source": "EPEVER understanding solar inverters; Clean Energy Reviews" }, { "id": "charge-controller-mppt", "category": "charge_controller", "type": "MPPT (Maximum Power Point Tracking)", "key_specs": "DC-DC converter; allows array voltage > battery voltage; flexible array sizing", "cycle_life_or_durability": "N/A (electronic)", "efficiency": "95-98% conversion; harvests ~15-30% MORE energy than PWM (gain larger in cold: ~22% <10 deg C, ~8-12% >30 deg C)", "use_case_for_mining": "Recommended default for any meaningful solar->battery mining buffer; strongly favored in cold Canadian climates (higher Vmp) and for higher-voltage arrays", "cost_band_CAD_caveated": "Higher than PWM (premium justified above ~200-400 W array; CAVEAT)", "notes": "Converts excess panel voltage into extra charge current at battery voltage. The cold-weather harvest bonus aligns with Canadian off-grid mining.", "source": "Morningstar controller types FAQ; Renogy MPPT-vs-PWM; Gridova Living 2026 efficiency test; Anern MPPT-vs-PWM" }, { "id": "charge-controller-pwm", "category": "charge_controller", "type": "PWM (Pulse Width Modulation)", "key_specs": "Simple switch; array nominal voltage MUST match battery voltage", "cycle_life_or_durability": "N/A (electronic)", "efficiency": "~75-80% relative (loss when panel V exceeds battery V, most of the day)", "use_case_for_mining": "Only small (<~200 W), voltage-matched systems; POOR fit for mining-scale loads", "cost_band_CAD_caveated": "Lowest (~$100+ cheaper than comparable MPPT; CAVEAT)", "notes": "Cheaper but leaves energy on the table; rarely the right call once a real miner is the load.", "source": "Morningstar controller types FAQ; Renogy MPPT-vs-PWM; Anern" }, { "id": "generator-diesel", "category": "generator", "type": "Diesel genset", "key_specs": "High fuel energy density; dispatchable; fuel burn ~0.22-0.28 L/kWh (avg ~0.25)", "cycle_life_or_durability": "Durable, long service life; peak efficiency at ~70-80% of rated load", "efficiency": "~25-40% (typical ~30%; new/large up to 40%, part-loaded 20-25%)", "use_case_for_mining": "Dispatchable baseload/backup where no grid; pairs well with a battery for load-following; reliable cold-start/continuous prime power", "cost_band_CAD_caveated": "Fuel + maintenance cost driven (CAVEAT - diesel price + duty cycle)", "notes": "Emissions, maintenance and fuel logistics are the cost. Avoid chronic light loading (wet-stacking).", "source": "Elan Fuels diesel generator efficiency; GeneratorSource fuel chart; DIY Solar Forum generator efficiency thread" }, { "id": "generator-natural-gas", "category": "generator", "type": "Natural-gas genset", "key_specs": "Fuel burn ~7.4 cubic feet (~0.21 m3) per kWh; efficiency slightly below diesel under variable load", "cycle_life_or_durability": "Long service life on clean fuel; peak efficiency ~70-80% load", "efficiency": "Comparable to diesel (~25-35%), can lag under variable load", "use_case_for_mining": "KEY for flare/stranded-gas Bitcoin mining — converts otherwise-wasted/vented methane into hashrate at lowest fuel cost where pipeline or wellhead gas exists; cleaner than diesel", "cost_band_CAD_caveated": "Lowest fuel cost where gas is available/stranded (often ~free flare gas); needs gas supply (CAVEAT)", "notes": "Less portable (needs gas feed). The canonical off-grid mining heat-engine for oil-and-gas sites; ties to mining-energy-sources flare/stranded-gas row.", "source": "GeneratorSource natural-gas fuel chart; wPower NG consumption chart; Blue Sky Electric NG generator" }, { "id": "generator-propane", "category": "generator", "type": "Propane (LPG) genset", "key_specs": "Fuel ~4.2 kWh per US gallon (small units ~15% real-world efficiency); stores indefinitely without degradation", "cycle_life_or_durability": "Clean-burning -> lower engine fouling; good cold-weather starting", "efficiency": "Lower than diesel (energy density of LPG is lower); ~15-25% real-world on small units", "use_case_for_mining": "Remote/portable backup and long-term fuel storage (propane doesn't go stale like gasoline); intermittent/seasonal mining", "cost_band_CAD_caveated": "Typically higher $/kWh than diesel/NG; convenient + storable (CAVEAT)", "notes": "Best where fuel must be stockpiled for months or where clean exhaust matters; lower energy density means more tankage per kWh.", "source": "Solvebility/kwcalc generator fuel calculators; Generac standby fuel-use support; GeneratorSource" } ] }