LIFELINE
DC To DC Calculator
This calculator is designed to calculate DC loads to DC battery banks +/- a battery. To compute AC loads to DC battery banks, click here.
Load Amperage
Amperage input at voltage rating chosen above.
This calculator computes the number of batteries needed for any application +/- a battery. System is set to +20% (ah X 1.2) to account for wire resistance, resulting voltage loss, heat, and other DC system inefficiencies.
For Critical Applications, battery sizing should be a starting point. Unusual circumstances call for an additional 100-500+ ah battery bank.
The computation does not account for losses of up to half ampacity for colder temperatures OR increased self discharge in warmer climates and on older batteries.
System does not account for amperages outside battery possible limits.
As a battery chemically transforms from fully charged to discharged, it’s voltage drops from 13.5 – 10.5 volts for a 12 volt battery. As the voltage drops this affects the amount of amps required to drive a load. (Watts law: amps x volts = watts)
10.5 volts x 12.86 amps = 135 watts
AGM Batteries are not harmed by high amperage charge and discharge so long as the input voltage is carefully regulated.
Charge 6 volt batteries at 6.6 – 7.2 volts
Lifeline Battery Part # | Batteries Necessary for Reserve Power @ 50% Depth of Discharge |
---|---|
LL-12V128-GC2 |
5 hour reserve: -- 12 hour reserve: -- 1 day reserve: -- 3 day reserve: -- 5 day reserve: -- Batteries, +/- 1 |
LL-12V100-24 Lithium Battery |
5 hour reserve: -- 12 hour reserve: -- 1 day reserve: -- 3 day reserve: -- 5 day reserve: -- Batteries, +/- 1 |
LL-1257TB AGM Racing Battery |
5 hour reserve: -- 12 hour reserve: -- 1 day reserve: -- 3 day reserve: -- 5 day reserve: -- Batteries, +/- 1 |
LL-1236TB AGM Racing Battery |
5 hour reserve: -- 12 hour reserve: -- 1 day reserve: -- 3 day reserve: -- 5 day reserve: -- Batteries, +/- 1 |
GPL-L16T-2V AGM Battery |
5 hour reserve: -- 12 hour reserve: -- 1 day reserve: -- 3 day reserve: -- 5 day reserve: -- Batteries, +/- 1 |
GPL-6CT-2V AGM Battery |
5 hour reserve: -- 12 hour reserve: -- 1 day reserve: -- 3 day reserve: -- 5 day reserve: -- Batteries, +/- 1 |
GPL-4CT-2V AGM Battery |
5 hour reserve: -- 12 hour reserve: -- 1 day reserve: -- 3 day reserve: -- 5 day reserve: -- Batteries, +/- 1 |
GPL-31T-2V AGM Battery |
5 hour reserve: -- 12 hour reserve: -- 1 day reserve: -- 3 day reserve: -- 5 day reserve: -- Batteries, +/- 1 |
GPL-L16T AGM Battery |
5 hour reserve: -- 12 hour reserve: -- 1 day reserve: -- 3 day reserve: -- 5 day reserve: -- Batteries, +/- 1 |
GPL-6CT AGM Battery |
5 hour reserve: -- 12 hour reserve: -- 1 day reserve: -- 3 day reserve: -- 5 day reserve: -- Batteries, +/- 1 |
GPL-4CT AGM Battery |
5 hour reserve: -- 12 hour reserve: -- 1 day reserve: -- 3 day reserve: -- 5 day reserve: -- Batteries, +/- 1 |
GPL-U1T AGM Battery |
5 hour reserve: -- 12 hour reserve: -- 1 day reserve: -- 3 day reserve: -- 5 day reserve: -- Batteries, +/- 1 |
GPL-8DL AGM Battery |
5 hour reserve: -- 12 hour reserve: -- 1 day reserve: -- 3 day reserve: -- 5 day reserve: -- Batteries, +/- 1 |
GPL-8DA AGM Battery |
5 hour reserve: -- 12 hour reserve: -- 1 day reserve: -- 3 day reserve: -- 5 day reserve: -- Batteries, +/- 1 |
GPL-4DL AGM Battery |
5 hour reserve: -- 12 hour reserve: -- 1 day reserve: -- 3 day reserve: -- 5 day reserve: -- Batteries, +/- 1 |
GPL-4DA AGM Battery |
5 hour reserve: -- 12 hour reserve: -- 1 day reserve: -- 3 day reserve: -- 5 day reserve: -- Batteries, +/- 1 |
GPL-31XT AGM Battery |
5 hour reserve: -- 12 hour reserve: -- 1 day reserve: -- 3 day reserve: -- 5 day reserve: -- Batteries, +/- 1 |
GPL-31T AGM Battery |
5 hour reserve: -- 12 hour reserve: -- 1 day reserve: -- 3 day reserve: -- 5 day reserve: -- Batteries, +/- 1 |
GPL-30HT AGM Battery |
5 hour reserve: -- 12 hour reserve: -- 1 day reserve: -- 3 day reserve: -- 5 day reserve: -- Batteries, +/- 1 |
GPL-27T AGM Battery |
5 hour reserve: -- 12 hour reserve: -- 1 day reserve: -- 3 day reserve: -- 5 day reserve: -- Batteries, +/- 1 |
GPL-24T AGM Battery |
5 hour reserve: -- 12 hour reserve: -- 1 day reserve: -- 3 day reserve: -- 5 day reserve: -- Batteries, +/- 1 |