Energy Storage
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Sortable table. Click on header item.
Average battery energy storage capital costs in 2019 were $589 per kilowatthour (kWh), and battery storage costs fell by 72% between 2015 and 2019, a 27% per year rate of decline.
Number
 Type
 Energy Density
 Charge Time
 Cost Per KWH
 Hold Time Days
 Efficiency
 Cost to Implement
 Home
 Storage per Unit Notes
1
 Salt Batteries
 2
 60
3




2
 Compressed Air
0
365
 80



3
 Compressed Cryo Air
0
365




4
 Pumped Hydro
0
365




5
 Gravity
0
365




6
 Lithium
8
3

Y

7
 Controlled Consumption


365




8
 Hot Water Storage


8

Y

9
 Autonomous Industrial Production


365




10
 Algae Oil
200
365




11
 Hydrogen
5
365
 25-40



12
 Thermal Battery > Photo Voltaics


10
 50



13
 Flow Batteries


5




14
 Wall Batteries


5




15
 Water Heater Tanks remotely controlled


8




16
 Direct to Storage Concentrated Solar


8




17
 Geothermal Ground Loop
24
7
 400



18
 Lead Acid
24






19
 Ultra Caps
.2







Regular gasoline has a shelf life of three to six months, while diesel can last up to a year before it begins to degrade.
On the other hand, organic-based Ethanol can lose its combustibility in just one to three months due to oxidation and evaporation.
Tracking the age of the fuel in your tank can be a challenge.