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
