Preventive Maintenance Services | PEC Technology (Thailand) Co., Ltd.
At PEC Technology (Thailand) Co., Ltd., founded in 1995, we recognize that the reliability of your power and energy storage systems depends on proactive care, not just quality equipment. With over 28 years of specialized expertise in power electronics and the battery business, led by our founder Mr. Kasiean Sukemoke, we provide comprehensive preventive maintenance services designed to maximize system reliability and extend battery life.
Our maintenance services cover critical power infrastructure, including UPS systems, emergency lighting, and both short- and long-duration backup solutions.
Why Battery System Maintenance Matters
Regular preventive maintenance is essential to:
- Maximize system reliability during power outages and critical events
- Extend battery service life and reduce the risk of premature failure
- Enable timely system adjustments, such as charger and float voltage calibration
- Identify weak or abnormal cells early, before they affect overall system performance
- Plan strategic replacements for individual cells or complete battery banks in a controlled, budgeted manner
Our Preventive Maintenance Program
1. Strong Foundations: Installation and Setup
Long-term reliability starts with proper installation. As part of our service lifecycle, we emphasize:
- Site Preparation Adequate ventilation and lighting to support cooling, safe operation, and effective maintenance.
- Protective Flooring Epoxy-coated floors and racks to protect against spills, especially for flooded lead-acid batteries.
- Optimal Spacing Typical spacing of around 0.5 inches (1.25 cm) between batteries to aid heat dissipation and allow safe, orderly cable routing.
- Connection Integrity Cleaned terminals, correct torque application, clear polarity checks, and proper routing to ensure low-resistance, safe connections.
- Grounding and Integration Verification of 0 V potential between battery terminals and metallic structures, and safe integration with breakers, switches, chargers, and UPS systems.
These practices create a stable foundation that supports effective ongoing maintenance.
2. Comprehensive Maintenance Procedures
Our preventive maintenance program combines visual inspection, electrical measurements, and trend analysis.
a. Initial Data Collection and Visual Inspection
At each maintenance visit, our technicians:
- Record key system information:
- Battery brand and model
- System type (UPS, DC system, etc.)
- Charger and load characteristics
- Historical maintenance and test data
- Perform external inspections to identify:
- Corrosion on terminals or connectors
- Case swelling or deformation
- Electrolyte leaks or staining
- Rust, burn marks, or other signs of overheating or damage
This provides a clear baseline and helps quickly identify developing issues.
b. Key Parameters Monitored
We regularly measure and evaluate critical electrical and environmental parameters such as:
- System Voltage (Float Voltage)
- Measured monthly and compared against manufacturer recommendations.
- Undercharge reduces available capacity and may lead to sulfation.
- Overcharge accelerates grid corrosion, increases gassing, causes dry-out, and can contribute to thermal runaway.
- Ripple Voltage should typically not exceed about 0.5% of the DC bus voltage.
- Cell / Block Voltage
- Checked quarterly to ensure consistency across all cells or blocks.
- Significant deviations can indicate shorted cells, open circuits, or accelerated aging.
- Battery Current
- Float Current: Expected to be very low (for example, ≤100 mA per 100 Ah).
- For C&D Pure Lead VRLA, typical float currents are around 10 mA per 100 Ah.
- Ripple Current: Generally limited to ≤5% of the battery Ah rating to avoid excessive heating and premature wear.
- Float Current: Expected to be very low (for example, ≤100 mA per 100 Ah).
- Temperature
- Ambient temperature: Ideal range is approximately 20–25 °C. Every 8 °C increase above this range can roughly halve the expected battery life.
- Cell temperature: Checked quarterly. A difference greater than about 3 °C between cells may indicate internal problems or poor thermal management.
- Internal Resistance / Conductance
- Measured quarterly using ohmic testing tools.
- A 30–50% increase in internal resistance or 20–40% drop in conductance from baseline indicates significant degradation and potential need for replacement planning.
- Specific Gravity (Flooded Batteries)
- Used to verify state of charge and assess uniformity across cells in vented systems.
c. Capacity Testing (Discharge Testing)
To verify the real usable capacity of the battery system, we perform controlled discharge tests:
- Fully charge the battery bank via float charging (typically around 3 days) or an equalize charge, as recommended.
- Record baseline measurements (voltage, temperature, internal resistance, etc.).
- Discharge the system at a constant current according to the required test standard or specification, while logging system and cell voltages.
- Recharge the system using appropriate float or equalize settings and confirm recovery parameters.
Capacity testing provides clear, quantifiable insight into battery health and remaining service life.
Tools and Equipment Used
Our technicians are equipped with professional-grade tools to ensure accurate measurements and safe work practices, including:
- Digital Multimeter (DMM)
- Clamp Meter
- Thermometer or temperature probe
- Hydrometer (for flooded batteries)
- Torque Wrench
- Ohmic Tester (for internal resistance / conductance)
- Brass brush and cleaning materials
- Soda bicarbonate solution (for neutralizing spills and corrosion)
- Distilled water (for appropriate flooded cell maintenance)
- Full safety gear (PPE) for electrical and chemical protection
The Advantage of Battery Monitoring Systems (BMS) – BEMoS
To enhance preventive maintenance, PEC Technology provides and integrates the Battery Enterprise Monitoring System (BEMoS).
Key capabilities include:
- Real-Time Monitoring Continuous tracking of system and cell voltages, charge/discharge current, internal resistance (Ri), and temperature.
- Proactive Fault Detection Identification of abnormalities such as high Ri, low cell voltage, or abnormal temperature rise before they cause failures.
- Data Logging and Trend Analysis Historical data enables trend analysis, helping plan maintenance and replacements based on condition rather than guesswork.
- Automated Alarms Alerts delivered through software notifications, SMS, and email to ensure timely response to critical events.
- Remote Monitoring Web-based interfaces for remote visibility, ideal for distributed sites and high-availability environments.
BEMoS is particularly valuable for large-scale UPS systems with high voltage and current, where manual checks alone may not be sufficient.
PEC Technology’s Commitment
By partnering with PEC Technology (Thailand) Co., Ltd. for preventive maintenance, you gain:
- Decades of focused expertise in battery systems and power electronics
- Rigorous adherence to international standards, including IEEE 450 and IEEE 1188
- Extended battery and system life through structured, proactive care
- Tailored maintenance and monitoring solutions designed for uninterrupted, high-reliability operation
Our goal is to help you avoid downtime, control lifecycle costs, and keep your critical power systems performing at their best.
Contact Us
PEC Technology (Thailand) Co., Ltd. 181, 183 Sukontasawat Rd., Ladprao, Bangkok 10230, Thailand
Email: sales@pectecth.co.thPhone: +66-2907-8521 Website: www.pectecth.co.th
