Elie: Created page with "'''EROI''' stands for "'''energy return on investment'''". {{minor|Even in a world without money, EROI would still matter just as much.}} Definition: `EROI = energy_returned / energy_invested` ==For energy sources== EROI is an essential factor in determining whether an energy source is viable or not. The EROI has to be a lot greater than '''1''' (otherwise it would never "break even"). ==For energy storage== The EROI of any energy storage will always be '..."

2024-11-10T09:43:09Z

Created page with "'''EROI''' stands for "'''energy return on investment'''". {{minor|Even in a world without money, EROI would still matter just as much.}} Definition: <code>EROI = energy_returned / energy_invested</code> ==For energy sources== EROI is an essential factor in determining whether an energy source is viable or not. The EROI has to be a lot greater than '''1''' (otherwise it would never "break even"). ==For energy storage== The EROI of any energy storage will always be '..."

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'''EROI''' stands for "'''energy return on investment'''".
{{minor|Even in a world without money, EROI would still matter just as much.}}

Definition: <code>EROI = energy_returned / energy_invested</code>

==For energy sources==

EROI is an essential factor in determining whether an energy source is viable or not. The EROI has to be a lot greater than '''1''' (otherwise it would never "break even").

==For energy storage==
The EROI of any energy storage will always be ''less than'' 1, but the hope is to get it high as possible.

To calculate it:

<code>energy_invested</code> should include a few things:
* the energy it takes to manufacture or construct the energy storage{{x|This could ''include'' the energy needed to mine the materials. Or not. It's fine either way - but any estimate should ''specify'' whether or not this is included.}}
* the energy used during its operation ('''charging''')
* the energy it takes to recycle or dismantle the energy storage at its end-of-life

<code>energy_returned</code> should include:
* the energy obtained during its operation ('''discharging''')

For batteries with a lifespan defined by a finite number of charge/discharge cycles:
energy_invested = capacity*lifespan_cycles/charge_discharge_efficiency + energy_in_manufacturing + energy_in_recycling
energy_returned = capacity*lifespan_cycles

EROI - Revision history