Only qualified personnel should work on equipment with exposed mains terminals. Isolate power, verify the circuit is de-energized, and follow the approved drawing. Confirm protective earth, AC branch protection, conductor size, polarity, terminal torque, cable segregation, strain relief, and guarding against accidental contact.<\/p>\n
Place the battery securely in an approved orientation with terminal protection and restraint. Keep conductive tools and loose hardware away from the terminals. Provide the battery protection specified by the product and battery documentation, located so that an unfused conductor length is minimized where required by the design.<\/p>\n
Use individual branch fuses or documented electronic protection when fault isolation is required. Select each protective device for the DC voltage, normal and peak current, conductor ampacity, and prospective fault current available from both the supply and battery. A battery can deliver substantial fault energy even after AC is disconnected.<\/p>\n
Label camera branches, battery conductors, mains input, and monitoring connections. Maintain airflow around the supply and do not place the battery where supply heat will accelerate aging. A lockable enclosure should provide service access without exposing unauthorized people to live parts.<\/p>\n
<\/span>Commission the backup function under real load<\/span><\/h2>\nBefore connecting the battery, verify its voltage, polarity, condition, and compatibility. Confirm the supply output with AC present, then connect loads in controlled stages. Measure voltage and current at representative cameras in daylight and night modes. Check PTZ movement, heaters, illuminators, network traffic, and recording.<\/p>\n
Conduct a controlled AC-failure test. Confirm that supported devices continue operating without unwanted restart, video loss, network reset, or unstable voltage. Observe the DC bus during switchover. Verify alarms and status indications, then monitor the discharge for the required test duration without taking the battery below its documented limits.<\/p>\n
Restore AC and confirm normal recovery and charging. Measure charging behavior using a suitable method and ensure total thermal and electrical load remains within limits. Record the test date, battery condition, initial and final voltages, runtime, load, ambient temperature, and any camera interruptions.<\/p>\n
<\/span>Maintain the battery and distribution system<\/span><\/h2>\nBattery capacity declines with time, temperature, discharge history, and charging conditions. Establish an inspection and replacement plan based on the battery manufacturer’s guidance, site risk, and measured performance. Look for swelling, leakage, corrosion, loose terminals, damaged insulation, unusual heat, and persistent fault indications.<\/p>\n
Test the real backup path, not only an indicator lamp. A disconnected or degraded battery may appear normal until AC fails. Periodic controlled runtime or capacity testing provides better evidence. Inspect branch fuses and document replacements so recurring faults are investigated instead of repeatedly reset.<\/p>\n
WEHO states that it was established in 2007, offers more than 1,000 models, conducts 100% high-temperature full-load testing, and reports a 99.7% yield rate. Applicable certifications in the confirmed company information are ISO9001, CE, RoHS, FCC, and CCC. Verify the exact product documents and destination-market requirements for each project.<\/p>\n
<\/span>FAQs<\/span><\/h2>\n\n
<\/span>What does a CCTV power supply with battery backup do?<\/span><\/h3>\nIt powers compatible CCTV equipment from AC during normal operation, manages an approved standby battery, and maintains the DC output during a qualifying AC interruption. The exact charging, switchover, low-voltage disconnect, and alarm behavior depends on the documented model and system design.<\/p>\n
<\/span>How large should the backup battery be for CCTV cameras?<\/span><\/h3>\nAdd the real current of cameras, recorders, network devices, heaters, infrared illuminators, and other supported loads, multiply by the required backup time, then account for conversion loss, allowable depth of discharge, temperature, aging, and battery-manufacturer limits. Verify with a timed discharge test.<\/p>\n
<\/span>Can all 12V cameras use the same backup power supply?<\/span><\/h3>\nOnly if their permitted input range, polarity, current, startup behavior, grounding, cable loss, and branch protection are compatible. Cameras with heaters, infrared illumination, PTZ motors, or long cable runs may have significantly higher peak demand.<\/p>\n
<\/span>Why do CCTV cameras restart when AC power fails?<\/span><\/h3>\nPossible causes include slow or unsuitable switchover, a weak or disconnected battery, excessive peak load, low battery voltage, undersized wiring, loose connections, or a protection event. Measure the DC bus and individual branches during a controlled outage test.<\/p>\n
<\/span>Should every camera branch have its own fuse?<\/span><\/h3>\nIndividual branch protection can isolate a shorted camera or cable and simplify troubleshooting. The fuse or electronic protection must be selected for the DC voltage, conductor size, normal and peak current, and the available fault current from both the supply and battery.<\/p>\n
<\/span>How often should a CCTV backup battery be tested?<\/span><\/h3>\nFollow the battery and system maintenance instructions. Routine inspection should include terminals, temperature, swelling, corrosion, charger voltage, alarms, and a controlled runtime or capacity check at an interval appropriate to the site’s risk and battery technology.<\/p>\n<\/div>\n
![\"WEHO](\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/01-hero-14.png?quality=85&strip=all\" "\\"WEHO")
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