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IUU CHARGE PROFILE

Bulk & Absorption Charge Voltage U2

Recommended Charge Current I1

Float Voltage U3

Table 2: Voltage Regulated Charger - Charge settings at 25°C (77°F)

4.1.2 Commissioning Charge

Batteries lose charge while in transit or during storage. For this reason, a refresh charge should be given before putting

the battery into service. Allow the charger to go through a full charge cycle before they are used.

During commission, measure the battery voltage and after commissioning, measure the battery voltage and surface

temperature of each battery and log this data. Discover Commissioning Logs are online available online.

4.2 Discharging

No restriction on the discharge current up to the maximum allowable is required as long as the connections are properly sized and

the battery temperature stays within the allowable limits.

With traditional stationary and renewable energy systems, Depth of Discharge (DOD) is set to operate between 20% and 50% to

maximize the life of the batteries. By default, this may be set by power conversion manufacturer at 1.75 volts per cell (Vpc). Discover

Dry Cell batteries deliver 50% of its rated capacity above 2.05 Vpc, this is also the recommended LVD to optimize battery runtime and

longevity. Preventing batteries to operate at low voltages will increase cycle life expectancy. Standard RE warranty is reduced on

system designs that continuously exceed 50% DoD.

Reference LVD / I10

Table 3: Reference Low-Voltage-Disconnect / I10

4.3 Temperature Limits

The battery is designed to perform optimally at temperatures between 15-25°C. At lower temperatures the battery capacity is lower

BULK

ABSORPTION

I1 = 0.25C20 (max)

0.10C20 (min)

14 HRS

Maximum Charge Time (Must be Limited to 24 hrs)

Figure 1: Voltage Regulated Charge profile (IUU charger) at 25°C (77°F)

6 VDC

7.2V

6.8V

20% DOD

50% DOD

FLOAT

U2 = 2.40VPC

(+/-0.015VPC)

U3 = 2.25VPC

105%-108% recharge

8 HRS

NO TIME LIMIT

12 VDC

14.4V

I1 = Min 10% C20 to Max 25% C20

13.5V

6 VDC

12 VDC

6.30V

12.60V

6.15V

12.30V

24 VDC

48 VDC

28.8V

27.0V

24 VDC

48 VDC

25.20V

50.40V

24.60V

49.20V

discoverbattery.com

57.6V

54.0V