Regular battery testing prevents unexpected failures. Here are the five essential tests.
Test 1: Open Circuit Voltage
Disconnect 1 hour. Fully charged 12V = 12.7-12.9V. 2V cell = 2.10-2.15V.
Test 2: Load Test
Discharge at C20 rate to 10.5V. Healthy = 100% rated capacity. Below 80% = replace soon.
Test 3: Specific Gravity (Flooded Only)
Hydrometer: fully charged = 1.265-1.280. Variation of 0.030 between cells = problem.
Test 4: Internal Resistance Test
Battery impedance tester. 20%+ increase vs baseline = investigate.
Test 5: Thermal Imaging
IR camera during charge/discharge. 5C+ difference between adjacent cells = warning.
CHISEN Battery — 8 factories, 70M kVAh/year. OPzV/OPzS 100-3000Ah. Tel: +86 131 2666 8999 | jack@chisen.cn | www.chisen.cn