Tech Notes

    Practical Engineering Insights from Rapid Tips to In-Depth Technical Deep-Dives

    Explore our Tech Notes library for practical field tips and detailed technical walkthroughs straight from Eagle Eye Power Solutions technicians working on real-world battery and power projects.

    For product-specific documentation such as data sheets and manuals, please see our Products section.

    Battery Maintenance · Contingency Planning · Temperature

    Is Your Utility Substation DC System Prepared for Extreme Summer Weather?

    Key Takeaways:

    • Heat stress = hidden battery killer. Every 10 °C rise above 25 °C cuts lead-acid service life in half, making proactive checks vital before heatwaves.
    • Five-step summer prep list. Covers electrolyte level, float-voltage verification, cabinet airflow, and infrared scans to catch hot spots early.
    • Load-bank test timing. Explains why a 100% discharge in May–June gives you the widest margin before peak demand.
    • Cooling hacks. Field-tested tips for adding vent kits and thermal barriers without shutting down the string.
    • Compliance tie-in. Aligns each inspection step with NERC PRC-005 maintenance intervals and IEEE-450 best practices.
    Implementing this checklist reduces mid-summer battery alarms.

    Compliance · Hydrogen Safety · Ventilation

    Battery Room Ventilation Requirements

    Key Takeaways:

    • Know the threshold. OSHA & NFPA 2 set the action level at 4% hydrogen by volume (LEL); effective systems aim for ≤ 1%.
    • Sizing formula made simple. Provides step-by-step airflow calculation using battery charging current, room volume, and ceiling height.
    • Sensor placement matters. Explains why H₂ detectors belong at the ceiling high-point near exhaust fans, not at working level.
    • Compliance snapshot. Explanations link CFR 29 §1910.178, IEEE 1635, and NERC PRC-005 maintenance intervals.
    Proper ventilation cuts hydrogen alarm events.

    Lead-Acid · Power Quality · Ripple Current

    Lead-Acid Batteries and Ripple Voltage and Current. Is There a Problem?

    Key Takeaways:

    • Ripple defined. Explains AC “noise” on a DC bus—where it comes from and how it stresses lead-acid plates.
    • Failure mechanisms. Shows how sustained ripple accelerates grid corrosion, stratification, and thermal runaway.
    • Acceptable limits. Summarizes IEEE-484 & Telcordia specs: ≤ 5% peak-to-peak voltage or ≤ 10% of rated charging current.
    • Measurement tips. Recommends oscilloscope vs. RMS meter, probe placement, and sampling intervals for accurate readings.
    • Mitigation guide. Covers transformer-isolated chargers, LC filters, and how to size ripple-current fuses.
    Reducing ripple from 12% to 3% can double service life on a 48 V string.
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