Open Jack
CreatorFounder · OpenJack
Member since June 2026
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Published calculators36
Sorted by most popularMolten-salt two-tank thermal storage
Sizes a two-tank solar-salt heat store from its usable temperature swing: salt inventory, tank geometry, standing loss per day, freeze protection and the levelised cost of the heat it delivers.
Open JackHydrogen liquefaction
Screening of specific liquefaction energy and levelized cost of liquefaction (EUR/kg) for turning gaseous H2 into LH2 at -253 C.
PEM 20 MW Germany 2024
PEM water electrolyser, 20 MW, grounded on EU/IEA/IRENA/DOE 2024 techno-economics for Germany.
Agrivoltaic PV plant with dual land use
Elevated PV over a cultivated plot: light transmission sets the capacity density, the crop class sets the yield it costs, and the calculator reports LCOE, revenue per hectare and the French decree tests side by side.
Open JackUnderground H2 storage (salt cavern)
Screening levelized cost of storage (LCOS) for hydrogen in solution-mined salt caverns: working capacity, annual throughput, injection energy and EUR/kg storage cost.
CO2 methanation (Sabatier, power-to-gas)
Screening synthetic natural gas (SNG) output and levelized cost (EUR/MWh) for catalytic CO2 methanation from green hydrogen and captured CO2.
Green ammonia synthesis (Haber-Bosch)
Techno-economic screening of an electrified Haber-Bosch ammonia plant fed by green hydrogen and ASU nitrogen.
Modular amine post-combustion CO2 capture unit
Amine capture on industrial flue gas (boiler, cement, incinerator): regeneration heat, electricity, amine make-up, scaled CAPEX and cost of CO2 captured in EUR/t, on the Danish Energy Agency 401.a datasheet, sized in t/d like the CO2 liquefaction calculator.
Open Jack
Biogas Feedstock Mix & BMP Potential (CH4/CO2/Digestate) (fork)
Estimate annual biomethane potential from a mixed feedstock inlet using TS (MS), VS (MV), BMP and biogas CH4 content; outputs biogas, CH4, CO2 and digestate quantity.
PEM fuel cell CHP (H2 to power + heat)
Techno-economic screening of a PEM fuel cell cogeneration system: electricity, recovered heat, H2 consumption and electricity-only LCOE from a hydrogen feed.
Biomass gasification to hydrogen
Screening of hydrogen yield (kg/t biomass) and levelized cost (EUR/kg) from thermochemical biomass gasification + water-gas shift.
LOHC hydrogenation (toluene to MCH)
Screening reaction energy and levelized cost (EUR/kg H2) of binding hydrogen into a toluene/methylcyclohexane liquid organic carrier for ambient-condition transport (hydrogenation leg only).
Hydrogen refuelling station (HRS)
Screening levelized cost of dispensing (EUR/kg) at a 350/700 bar hydrogen refuelling station fed with delivered H2.
PV inverter conversion, clipping and levelized cost
Turns a PV inverter datasheet into AC energy delivered, conversion and clipping losses, and the levelized cost of the conversion step.
Open JackPV module yield & levelized cost (module-level)
Turns a PV module datasheet into annual yield, degradation-adjusted lifetime energy and levelized cost.
Open JackCommercial rooftop PV with on-site self-consumption
Prices a 100 kWp to 5 MWp commercial roof on the retail electricity it avoids: generation, self-consumed versus exported share, rooftop LCOE, net annual saving and simple payback.
Open JackSolar thermal collector field for heat
Sizes a flat-plate or evacuated-tube collector field delivering 60-110 degC heat, and levelizes its cost in EUR/MWh_th. Calibrated against the measured Danish fleet.
Ammonia cracking to hydrogen: cracker and PSA cost of service
Fired catalytic ammonia cracker with PSA purification, 20 to 3,500 t/d of ammonia: cracking service cost in EUR/kg of hydrogen (ammonia excluded), hydrogen delivered, LHV efficiency, ammonia burned as fuel and CAPEX, on the IEA 2019 and IRENA 2022 reference cases.
Zinc hybrid cathode long-duration battery storage, 4-12 h, levelised cost of storage
Aqueous zinc battery plant of the Eos Znyth type, 0.1 to 200 MWh and 4 to 12 h: LCOS in EUR/MWh discharged from PNNL-33283 costs and method with Eos efficiencies, battery-module replacements, energy discharged and charged, and an out-of-sourced-domain flag outside 1-10 MW and 4-10 h.
Utility-scale PV repowering at mid-life
Prices the mid-life replacement of modules and inverters on an operating PV plant as an increment over letting it run.
Building-integrated PV facade
BIPV on a building envelope: cost per m2 of skin net of the cladding it replaces, production read on the real vertical plane, and the levelized cost that comes out of the two.
Concentrating solar process steam
Linear Fresnel solar field delivering 150-390 C industrial process steam: annual yield, steam tonnage, solar fraction and LCOH in EUR/MWh_th, with no power block.
Sodium-ion stationary battery storage (containerised): LCOS, round-trip efficiency and degradation
Grid-connected sodium-ion battery containers from 2 to 500 MWh: LCOS in EUR/MWh delivered after the PNNL 2024 method with Keiner et al. 2026 costs, round-trip efficiency, linear capacity fade to 80 % and service life, by reference case.
Pumped hydro energy storage (PSH) plant
Pumped storage hydropower sized by rated power, duration and net head: reservoir volume and flow from E = rho g H V eta, sourced round-trip cases, PNNL cycle-time limit, PNNL CAPEX build-up with size and head scaling, O&M and a pre-tax real LCOS in constant EUR 2021.
Floating PV plant on water body
Floating solar on a reservoir: mooring-driven CAPEX premium, net water effect on yield, water surface occupied and LCOE against the same plant on land.
Small-scale wood gasification CHP: LCOE with heat and biochar credits
Fixed-bed wood gasifier with gas engine, 80 kW to 5 MW of fuel: LCOE in EUR/MWh net of heat and biochar sales (IRENA 2012 method), net electricity, heat sold, overall efficiency, wood bought in t/yr and drying need, by SynCraft, Hargassner or measured reference case.
Open JackLiquid air energy storage (LAES) plant levelized cost of storage
Liquid air energy storage plant: LCOS in EUR/MWh delivered from separate liquefier, turbine and tank costs (Gøtske et al. 2023 overnight literature cost, linear in capacity as in the source), round-trip efficiency from academic and vendor bases with optional waste heat, cycles capped by recharge time, and the gap to Carrington and Hunterston costs.
Flywheel energy storage for frequency regulation: standby losses, cycling and cost per MW of reserve
Flywheel plant for frequency regulation: cost per MW of reserve and per MWh exchanged from the DOE/EPRI 2013 handbook (Table B-27) or Beacon Hazle costs, with standby losses drawn all year, round-trip losses, and a life set by 125,000 cycles or 20 years.
Open JackSmall modular green ammonia plant: flexible Haber-Bosch loop, cost excluding hydrogen
Flexible Haber-Bosch loop with N2 purification, H2 buffer and NH3 storage, 1 to 300 t/d: ammonia cost excluding hydrogen and total cost in EUR/t, annual output, electricity per tonne and H2 buffer, with the small-size scale penalty from Palys 2018 and IRENA 2022.
Liquid hydrogen storage tank with boil-off management
Vacuum-insulated liquid hydrogen tank, 10 to 50,000 m3: stored mass, boil-off rate scaled on measured NASA and Linde tanks, yearly losses, vessel CAPEX from the DOE 68 m3 anchor, and storage cost per kg delivered with the boil-off vented, reused or reliquefied.
Stationary LFP lithium-ion battery storage (containerised BESS) levelized cost of storage
Grid-connected LFP battery containers, from a single 2 MWh container to 1,000 MWh: LCOS in EUR/MWh delivered from the NREL 2025 energy/power cost split, a Lazard 2025 small-system premium and the PNNL-33283 LCOS method, energy delivered and charged, round-trip efficiency by efficiency basis.
Industrial electric boiler (electrode or resistive) - levelised cost of steam
Electrode or resistance boiler for saturated steam or hot water: heat, steam tonnage and electricity per year, installed CAPEX with grid connection on DEA 2025 or SINTEF 2025, and the levelised cost of heat in EUR/MWh_th against a gas boiler fuel + CO2 benchmark.
CO2 conditioning and liquefaction for ship transport (low or medium pressure) levelized cost
Captured CO2 compressed, dried and liquefied at 7 or 15 barg for ship transport: levelised liquefaction cost in EUR/t, specific electricity in kWh/t, yearly electricity, CAPEX scaled on the daily flow (Roussanaly et al. 2021), and buffer storage as a separate line.
Biomass pyrolysis to biochar: cost per tonne of CO2 removed
Slow pyrolysis of wood chips, 300 to 5,000 kW of rated input, with the pyrolysis gas burnt for heat. Biochar, net CO2 removed (IPCC 2019 method) and the net cost per tonne removed after the heat credit, from DEA costs and BIOMACON datasheets.
Biological methanation (archaea bioreactor, H2 + CO2 to CH4) levelized cost of synthetic methane
Ex-situ biological methanation at 63 C and 10 bar: H2 and CO2 (pure or raw biogas) to grid-grade CH4. H2 and CO2 in t/yr, own electricity per Nm3, heat at 60 C, CAPEX on the Gantenbein 0.63 law, cost in EUR/MWh HHV with and without H2.
Advanced adiabatic compressed air energy storage (A-CAES): round-trip efficiency, duration and LCOS
Advanced adiabatic compressed air energy storage plant: LCOS in EUR/MWh delivered from a DOE/PNNL power block and a storage block calibrated on Hydrostor Silver City, scaled at 8 % per tenfold size (PNNL-33283), with literature round-trip efficiency, cycles capped by recharge time, and flags where the cost law is extrapolated.