How much current can you draw from a deep cycle battery?
A 2000W one will provide enough power to run power tools or even an electric jug, but at full output they will draw from the battery about 150-200 amps. That’s as much current as they winch when fully loaded, and way outside the comfort zone of any deep cycle battery for long periods of time.
How many amps is a fully charged deep cycle battery?
Voltage on a fully charged battery will read 2.12 to 2.15 volts per cell, or 12.7 volts for a 12 volt battery….Some common battery size codes used are: (ratings are approximate)
| U1 | 34 to 40 Amp hours | 12 volts |
|---|---|---|
| Group 24 | 70-85 Amp hours | 12 volts |
| Group 27 | 85-105 Amp hours | 12 volts |
What’s the maximum depth of discharge for a lead acid battery?
Although this varies cycle to cycle, the maximum depth of discharge for lead acid batteries is typically at or below 50%. The cycle life of lead acid batteries is highly dependent on the State of Charge (SoC) that the battery is cycled at.
What is the SOC of a lead acid battery?
A fully charged lead-acid cell has an electrolyte that is a 25% solution of sulfuric acid in water (specific gravity about 1.26). A fully discharged lead-acid cell has 12 Volt Lead Acid Battery State of Charge (SOC) vs. Voltage while under discharge
How is the discharge rate of a battery calculated?
The discharge current would have to be 30A to discharge the battery in 20 hours (600Ah / 20h). To work out the discharge time (the “C-rate”) from the Nominal Capacity and the Discharge current, divide the Nominal Capacity by the Discharge Current. This will give you the C-rate.
How is the nominal capacity of a battery calculated?
The Nominal Capacity of the battery is given at this C-rate. The discharge current can then be worked out from the C-rate and the Nominal Capacity. For example if a battery has a C1 capacity of 400Ah, this means that when the battery is discharged in 1 hour, it has a capacity of 400Ah.