Telecommunications
Outdoor-cabinet telecom sites, mobile switching centers, and base stations — especially critical for Thailand's hot climate where high-temperature VRLA batteries save total cost of ownership.
How to choose a battery for telecommunications
Cabinet temperature is the dealbreaker. A Thai street cabinet in direct sun hits 40–55 °C internally for weeks at a time. Only Pure Lead AGM chemistry is warranted above 35 °C — every indoor VRLA series (MRX, msEndur II, Liberty 1000) falls outside warranty conditions when deployed outdoors here.
TEL-HT is the only safe outdoor choice in Thailand. Rated –40 °C to +71 °C, it is built for the thermal envelope of sun-exposed telecom cabinets. Indoor MSC rooms can use standard AGM (LBTY 2V, MRX) but outdoor cell sites should not.
Backup time norms. 4–8 hours is the operator benchmark for cell sites where genset refuel is a multi-hour drive. MSC rooms running parallel generators often size for 1–2 hours.
Don't sacrifice headroom for CAPEX. A 20 % cheaper non-HT AGM will die in 2–3 Thai summers and the site revisit cost wipes the saving in one truck-roll.
Industrial battery specialists since 1995
As the sole authorised distributor of C&D Technologies in Thailand, PEC covers design, installation, procurement, and maintenance — IEEE 450/1188 compliant with 24/7 support.
See all servicesWhat to avoid in telecommunications projects
- Buying non-HT AGM for a sun-exposed cabinet to save CAPEX — the warranty is void above 35 °C average.
- Sizing for "normal" operation and ignoring the summer peak — Thai cabinets hit 50 °C inside for weeks.
- Skipping cabinet ventilation upgrades because the battery is "new" — the new battery still lives in the same oven.
Not sure which series fits?
Let our engineers size and compare 2–3 options for your site — with the TCO math and the reasoning behind each pick.
Get a QuoteSpecialist FAQ for telecommunications
Answers from PEC engineers — designing and installing industrial battery systems since 1995.
My existing non-HT VRLA has lasted 5 years outdoors — why do I need TEL-HT now?
Your 5-year lifespan is already below the rated 12 years because the cabinet exceeds the AGM's warranty envelope. You're paying for a premature replacement cycle. TEL-HT restores the 12-year baseline and removes the warranty-void risk.
Does a ventilation fan in the cabinet let me use indoor AGM instead of TEL-HT?
Not reliably. A fan drops internal temperature 5–8 °C — enough to rescue a cabinet that sits at 40 °C without it, but a Thai cabinet in direct sun still hits 50 °C internally. Fan failure (which happens) spikes it 10 °C higher. TEL-HT removes the dependency.
What's an acceptable backup time for a cell site in Thailand?
Operator benchmark is 4–8 hours. Sites along highways with 2-hour genset refuel response run 4 hours; remote hilltop sites with 6–8 hour response need 8+. Under 4 hours is difficult to defend in an outage post-mortem.
Can I buy half the bank now and half next year to spread CAPEX?
Only if you can physically isolate the halves on separate rectifiers. Mixing ages of AGM in one string reduces usable runtime to the oldest cells and voids most warranties. Phased deployment works across sites, not inside one site.
How do I prove the cabinet temperature history for warranty?
Install a temp logger at cell midpoint for the first 30 days. Keep the CSV. C&D accepts this as baseline proof; we'll recommend the model we use.
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