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POWER TO POWER ANALYSIS
BATTERY
DATA INPUT
Nominal battery Ah
Ah
Nominal battery DC voltage
VDC
Depth of discharge
Coulombic efficiency of battery
Efficiency of the charger
Total number of batteries to be charged per day
batteries
CHARGER
Charger input voltage VAC
V
Charger input power phases
Φ
Charger input current (Amps)
A
Charger output maximum power kW in hour
kW
Number of chargers
chargers
FUEL CELL GENERATOR
kWh of electricity produced per Kg of H2
- energy conversion
kW
Market value of H2 per Kg if bought liquid delivered
/Kg
ELECTROLYZER
kWh per Kg of H2 produced
kWh/Kg
Value of electricity per kWh
$/kWh
H2 production per hour
Kg/hr
Hours available per day to make H2 (if solar, hours of sunlight)
Hours
H2 storage capacity
Kgs
CALCULATIONS
Kwh of battery (nominal battery storage capacity)
Kwh
Amount of energy available in battery (depth of discharge)
Kwh
Amount of energy required to recharge battery
Kwh
Total energy charger needs to recharge battery
Kwh
Hours needed to recharge battery to fully charged
Hours
Kg of H2 to charge one battery
Kg
Value of electricity to produce one Kg of H2 by electrolyzer
per Kg
Cost in H2 per battery charge if H2 supplied by electrolyzer
per full charge
Cost in H2 per battery charge if H2 supplied by others (liquid)
per full charge
H2 produced per day by electrolyzer
Kg
Charger input power requirements in kW (one only)
kW
Total energy requirements for all chargers at peak
kW
Total Kg of H2 required to produce DC electricity
Kg/day
Total cost in H2 (market value) for all batteries charged
H2 expense
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