Being able to quantify the difference between battery technologies is essential in understanding why one is better than another. For comparison purposes all batteries will be rated at 12V100Ah.

Flooded Lead Acid | Sealed Gel lead acid | Lithium-Ion | Lithium-Polymer | Lithium Iron Phosphate | |

Rated Ah | 100 | 100 | 100 | 100 | 100 |

Depth of Discharge | 50% | 50% | 80% | 80% | 80% |

Available Ah | 50 Ah | 50 Ah | 80 Ah | 80 Ah | 80 Ah |

C rating | 0.2C(20 amp) | 0.2C(20 amp) | 0.4 C(40 amp) | 0.4C(40 amp) | 1C(100 amp) |

Battery efficiency | 25% | 40% | 95% | 95% | 98% |

Voltage | 13-10V(11V avg) | 13-10V(11V avg) | 12.6V | 12.6V | 12.6V |

Usable Ah/cycle | 12.5 Ah | 20 Ah | 76 Ah | 76 Ah | 78 Ah |

Power density/cycle | 137.5 Wh | 220 Wh | 957.6 Wh | 957.6 Wh | 982.8 Wh |

Rated cycles | 300 | 1000 | 2000 | 2000 | 3000 |

Total Power density | 41 kWh | 220 kWh | 1,915 kWh | 1,915 kWh | 2,948 kWh |

Definitions

**V- Volts:** The speed of energy transfer

**A- Amps:** The amount of energy transferred at a given voltage

**Ah – Amp Hour:** The amount of energy transferred at a given voltage over period of one hour

**W- Watt:** Total volume of power transferred calculated as V x A = W

**Wh – Watt hour:** Total volume of power transferred over a period of one hour

**kWh – kilowatt hour:** Total volume of power transferred over a period of one hour calculated as Wh/1000 (equal to 1000 Wh)

**Rated Ah-** The number of Ah in one cycle as rated by the manufacturer

**Depth of discharge-** The percentage of one cycle available to preserve the long-term life of the battery.

**Available Ah-** The amount of Ah available in one cycle calculated as Rated Ah x Depth of discharge

**C Rating-** The rated output of the battery based on the rated Ah of the battery calculated as C x Rated Ah. (1C x 100Ah= 100 Amp output) The C rating listed is what the manufacturer to preserve long-term life. This does not represent the capability of the battery.

**Battery efficiency-** The ability for the battery to transfer energy in and out of the battery listed as a percentage. (50% efficiency means that the battery can charge/discharge 50% of the total energy)

**Usable Ah/cycle-** Available Ah x battery efficiency

**Power density/cycle-** Avg voltage x usable Ah/cycle = Wh/cycle

**Rated Cycles-** The total charge/discharge cycles rated by the manufacture at a given depth of discharge and C rating

**Total Power density-** Power density/cycle x Rated cycles