Telecom Backup Power Solutions
When the grid goes down, the site stays up — or it does not. Our LiFePO4 backup batteries are configured for telecom base stations, tower sites, data rooms and remote installations that run on the 48V DC plant standard.
LJY Energy supplies standard and configured LiFePO4 batteries for telecom integrators, tower companies, site-power contractors and distributors. As a China-based LiFePO4 battery supplier and OEM/ODM solutions provider, we help buyers match cell configuration, usable capacity, rack format and monitoring protocol to the rectifier platform and autonomy target of each site.
What Telecom Backup Systems Typically Need
Telecom backup is standby duty with no room for improvisation: the battery sits on the rectifier for months, then has to carry the full site load the moment mains power fails. Sizing and compatibility therefore start from the DC plant and the required backup hours, not from the battery catalogue.
- The 48V DC plant standard: telecom site power is engineered around 48V DC. For LiFePO4 that means a 15S pack — 48.0V nominal with a typical 54.75V charge voltage — not the 16S (51.2V) configuration used in solar storage. The two are not interchangeable on the same rectifier.
- Rack format: 19″ rack-mount modules (2U/3U-class) with front terminals fit standard telecom cabinets and make swap-outs a one-technician job.
- Runtime and autonomy: sized from the site load multiplied by the backup hours the operator requires — a few hours for urban sites with generator cover, much longer for remote sites where a service visit takes a day.
- Rectifier compatibility: the battery must charge correctly from the site rectifier. Confirm the rectifier can be set to the lithium charge profile (15S, 54.75V typical); lead-acid float and equalization routines are not a LiFePO4 charging profile.
- Temperature range: outdoor cabinets see real heat and real cold. Low-temperature charge protection is a minimum; unheated sites that must recharge below freezing need it specified, not assumed.
- Remote monitoring: unmanned sites need the battery visible to the site controller — a communication BMS (CAN / RS485 / SMbus) reporting state of charge and alarms.
- Redundancy: parallel modules mean a single battery can be serviced or replaced without taking the site off air.
Planning a site or a fleet rollout? Start with the load profile and autonomy target, then read our 48V 50Ah telecom battery specification and sourcing guide, which covers the 15S vs 16S distinction in detail.
Recommended Battery Solutions
The following standard models cover the most common telecom backup paths, from a single base-station rack to larger hybrid site-power cabinets. Final compatibility should be confirmed against the rectifier charge profile, cabinet dimensions, monitoring platform and the selected battery’s parallel limits.
Running hybrid solar + generator sites with no grid at all? See our Off-Grid Energy Storage solutions for the remote-site system view, or the Solar Energy Storage solutions if the array is the primary source.
Key Selection Factors
- Start from the runtime target: backup hours = usable energy ÷ site load. One 48V 50Ah module stores 2.4kWh nominal (about 1.9kWh of working capacity at 80% depth of discharge) — work backwards from the hours the operator contract requires.
- Confirm rectifier charge settings: telecom LiFePO4 is 15S, charging at 54.75V typical. A rectifier left on a lead-acid profile, or set for a 16S solar battery (58.4V), will charge the site battery incorrectly. Verify the setting before the first module ships.
- Count the rack space: measure available U height, cabinet depth and front-terminal clearance in the existing cabinet — the standard module is built for 19″ telecom cabinets (2U/3U-class, US2000/US3000 class footprint).
- Plan parallel expansion: multiple racks in parallel extend autonomy without changing the DC plant. Confirm the maximum parallel count and how the monitoring chain is wired for your configuration.
- Match the monitoring protocol: CAN, RS485 and SMbus communication BMS options cover most site controllers — specify your monitoring platform in the order so the firmware and cabling match.
- Check the site temperature: rooftop and outdoor cabinets can exceed comfortable ranges at both ends. Confirm the operating window for your sites, and specify low-temperature charge protection where winters are real.
Technical Resources
- 48V 50Ah Telecom LiFePO4 Battery (15S, 2.4kWh) — Wholesale & OEM — full specification, the 15S vs 16S distinction, cell options and sourcing notes.
- How to Charge a LiFePO4 Battery — charging stages, profiles and settings, including standby and rectifier charging.
- LiFePO4 Charging Voltage Chart — reference charge-voltage ranges by configuration, including the 15S telecom profile.
- Cycle Life vs Depth of Discharge — how standby duty and outage depth affect service life.
- Calendar Aging Guide — what standby-dominated duty means for long-term capacity retention.
Wholesale & OEM/ODM Inquiry
LJY Energy supports telecom integrators, tower companies and distributors with sample evaluation, repeat wholesale supply and OEM/ODM configurations confirmed per project. Depending on the project, requirements may include rack enclosure and label branding, BMS communication protocol and firmware, monitoring functions and packaging for multi-site rollouts.
Before requesting a quotation, review the MOQ and sample order guide and the LiFePO4 wholesale buyer’s guide. Then send us the site load, autonomy target, rectifier model and charge settings, cabinet format, monitoring platform and target quantity so the recommendation starts from the actual site power system.
Frequently Asked Questions
Why is telecom backup standardized on 48V?
Because the whole site power ecosystem — rectifiers, DC distribution and the connected equipment — is engineered around the 48V DC plant standard. For LiFePO4, matching that plant means a 15S pack at 48.0V nominal with a 54.75V typical charge voltage. Batteries marketed as “48V” for solar are usually 16S (51.2V) and charge at 58.4V; on a telecom rectifier they will not charge correctly, so the configuration — not just the label — has to match.
How much runtime does one 48V 50Ah module provide?
The module stores 2.4kWh nominal. Runtime is usable energy divided by your site load: at 80% depth of discharge the working capacity is about 1.9kWh, so a 500W load runs for roughly 3.5–4 hours and a 1kW load for just under 2 hours. Treat these as planning figures — confirm against the actual load profile, and add parallel modules if the autonomy target is higher.
Can LiFePO4 replace lead-acid in existing telecom racks?
That is what the rack-mount module is built for: it fits standard telecom cabinets (US2000/US3000 class) in place of the old battery strings, at a fraction of the weight. Two things must be checked per site before the swap — the rectifier’s charge settings must suit the lithium 15S profile, and the terminal layout and cabinet space must match. We confirm both against your rectifier model and cabinet specification at the quotation stage.
Can modules be paralleled for longer autonomy?
Yes — multiple racks operate in parallel to extend site autonomy, which is how larger shelters and aggregation sites are usually built. Confirm the maximum parallel count and the monitoring arrangement for your configuration when ordering, and expand with identical modules.
What remote monitoring is available?
A communication BMS with CAN, RS485 and SMbus options reports state of charge and battery alarms to the site monitoring platform, so an unmanned site’s backup battery stays visible between visits. Specify your monitoring platform in the order so the protocol and firmware are matched per project.