Telecom Tower Backup Power
91% generator runtime reduction | 3-year payback | 15-yr LFP battery life | $10K-$20K/yr power cost eliminated per high-density 5G site | 850 lbs, 19″ x 84″ rack-mount
For a tower company or WISP managing hundreds of remote sites, power is not just infrastructure; it is the second-largest operating expense after labor. Energy runs 15 to 40% of telecom OpEx today. High-density 5G sites draw $10,000 to $20,000 per year in power costs alone. And the backup power system sitting in each tower cabinet is directly contributing to that number: through generator fuel consumption, reactive maintenance truck rolls, lead-acid battery replacement cycles, and the SLA penalties that follow a site outage.
Evoltix’s Zero-Glitch Power Module (ZPM) is a power intelligence system. It is not just a replacement UPS, and it is not just a DC power plant. It replaces the function of both the UPS and the DC plant in a single, preintegrated, rack-mount unit that changes the economics of tower site power from the ground up.
A rural Alaskan WISP operating remote tower sites in some of the most demanding conditions in North America cut generator runtime by 91% after deploying the ZPM. That is not a marketing claim. That is the measured outcome when battery-first architecture replaces a system that was designed to run generators, not to minimize them.
The Power Cost Problem at Tower Sites
Tower operators have managed power costs the same way for two decades: a DC power plant or UPS to bridge brief outages, a generator to carry the load when the grid goes down, and a field technician dispatched when something fails. That model worked when sites were simple, fuel was cheap, and outages were short. Three things have changed.
A legacy 4G macro site draws roughly 1 to 3 kW of continuous load. A high-density 5G site with Massive MIMO and edge compute equipment can draw 5 to 10 kW or more, and power costs at these sites compound rapidly.
AI data center buildouts, EV charging infrastructure expansion, and more frequent extreme weather events are straining utility grids in ways that were not anticipated when most tower backup systems were designed. Longer and more frequent grid interruptions mean generators run more, fuel costs climb, and the sites with the thinnest backup margins are the ones that go dark.
The average tower operator dispatches a field technician to a site once every one to two weeks. The majority of those truck rolls are reactive, like responding to a fault, replacing a failed battery, or investigating an alarm that could have been resolved remotely. At $300 to $800 per truck roll, and dozens to hundreds of sites in a network, the OpEx math is not sustainable at scale. Operators who have shifted from reactive dispatch to remote monitoring are spending materially less per site per year.
What Your Current Backup System Is Actually Costing You
The capital cost of a DC power plant or tower UPS is the number on the purchase order. The total cost of ownership over 10 years is the number that matters.
| Cost Driver | Legacy DC Plant / UPS | Evoltix ZPM | Notes |
|---|---|---|---|
| Generator fuel consumption | Full runtime every grid event | Battery-first: generator starts only at threshold or not at all | Up to 91% generator runtime reduction |
| Battery replacement cycle | Every 3–5 yrs (VRLA lead-acid) | Up to 15 yrs (LFP) | Eliminates 2–3 full replacement cycles per site over 10 yrs |
| Reactive truck rolls | Weekly to bi-weekly at many sites | IntelliCore surfaces anomalies before failure | Remote diagnosis resolves most issues before dispatch |
| SLA breach exposure | High: silent battery failure = dark site = penalty | Low: predictive alerts + 2+ hrs runtime buffer | Particularly critical for neutral-host colocation operators |
| Battery disposal & logistics | Every replacement cycle | Eliminated for 15 years | Reduces logistics cost and ESG/disposal liability |
| Payback period | N/A (ongoing cost) | ~3 years | Confirmed across deployed customer networks |
Source: Evoltix deployment data and industry benchmarks. Results vary by network size, geographic region, and grid reliability. Contact Evoltix for a site-specific TCO model.
How the ZPM Changes Tower Site Power Economics
The ZPM ships as a single rack-mount unit (19″ x 24″ x 84″, 850 lbs fully configured) with LFP batteries mounted, wired, and tested at the factory. It fits a standard 19-inch equipment enclosure. A typical two-person crew can complete installation without special tooling. It replaces both DC power plant and UPS functionality — no secondary inverter, no fragmented components.
Battery-first architecture eliminates generator-first operation
The ZPM runs the site on battery power during grid events. The generator starts only when the battery state of charge drops below a configurable threshold, or not at all for shorter outages. Operators who have transitioned from generator-first to battery-first operation report generator runtime reductions of 70 to 91%. At $3 to $6 per generator hour including fuel and wear, that reduction compounds significantly across a fleet of sites.
Runtime built for telecom load profiles -- 4G and 5G
A typical 4G tower site drawing 2 to 3 kW of critical load runs on ZPM 1 battery power for 2.56 to 3.84 hours. A 5G site drawing 5 to 6 kW runs on ZPM 2 for 2.56 hours. For sites requiring extended runtime beyond the standard unit capacity, the ZPM supports connection to a separate Energy Storage Rack, enabling up to 153.9 kWh of total energy storage without stacking units. See the full runtime table below.
AC and DC distribution from one unit (no secondary inverter)
Tower sites run a mix of DC-powered radios and AC-powered ancillary equipment. A DC power plant handles the radios but requires a separate inverter for AC loads — another component, another failure point, more to maintain. The ZPM provides backed-up AC output and fully managed DC distribution with up to 14 connection points, from one preintegrated unit.
15-year LFP battery life
The ZPM uses lithium-iron phosphate (LFP) chemistry rated for up to 15 years of service life. LFP batteries require no ventilation for off-gassing, a practical advantage for existing tower enclosures not designed for vented battery storage. Battery condition is continuously monitored by IntelliCore; degradation is predictable and visible, not silent like lead-acid failure.
Extended energy storage via separate Energy Storage Rack
For sites requiring runtime beyond the on-unit battery capacity, the ZPM supports connection to a dedicated Energy Storage Rack, expanding total storage up to 153.9 kWh. This is the correct configuration for high-load 5G sites, extended outage environments, or operators targeting 8+ hours of autonomous operation without generator support.
ZPM Backup Runtime at Typical Telecom Tower Load Profiles
Highlighted rows (green) = the 2 to 9 kW range typical of 4G macro sites and 5G deployments. All figures sourced from approved Evoltix ZPM spec insert 02.26_01. Runtime is at 100% depth of discharge.
| Critical Load | Amps @ 48VDC | ZPM 1 (up to 4.5 kW) | ZPM 2 (4.5–9 kW) | ZPM 3* (9–13.5 kW) |
|---|---|---|---|---|
| 0.5 kW | 10.42A | 15.36 hrs | 30.72 hrs | 43.08 hrs |
| 1 kW | 20.83A | 7.68 hrs | 15.36 hrs | 23.04 hrs |
| 1.5 kW | 31.25A | 5.12 hrs | 10.24 hrs | 15.36 hrs |
| 2 kW | 41.67A | 3.84 hrs | 7.68 hrs | 11.52 hrs |
| 2.5 kW | 52.08A | 3.07 hrs | 6.14 hrs | 9.22 hrs |
| 3 kW | 62.50A | 2.56 hrs | 5.12 hrs | 7.68 hrs |
| 3.5 kW | 72.92A | 2.19 hrs | 4.39 hrs | 6.58 hrs |
| 4 kW | 83.33A | 1.92 hrs | 3.84 hrs | 5.76 hrs |
| 4.5 kW | 93.75A | 1.71 hrs | 3.41 hrs | 5.12 hrs |
| 5 kW | 104.17A | — | 3.07 hrs | 4.61 hrs |
| 6 kW | 125.00A | — | 2.56 hrs | 3.84 hrs |
| 7 kW | 145.83A | — | 2.19 hrs | 3.29 hrs |
| 8 kW | 166.67A | — | 1.92 hrs | 2.88 hrs |
| 9 kW | 187.50A | — | 1.71 hrs | 2.56 hrs |
| 13.5 kW | 281.25A | — | — | 1.71 hrs |
*ZPM 3 in development. Actual runtime varies by load profile and operating conditions. For simulcast networks and high-load P25 Phase 2 sites, consult an Evoltix application specialist for a site-specific runtime analysis.
ZPM Model Specifications
ZPM 3 (9-13.5 kW serviceable load, 18 kW conversion, 8 inverter modules, 600Ah @ 48VDC, 281.25A max @ 48VDC) is in development.
| Specification | ZPM 1 | ZPM 2 |
|---|---|---|
| Serviceable Load | up to 4.5 kW | 4.5 – 9 kW |
| Power Conversion Capacity | 9 kW | 13.5 kW |
| Inverter Modules | 4 | 6 |
| Max Current @ 48VDC | 93.75A | 187.5A |
| Max Current @ 240VAC | 18.75A | 37.5A |
| Energy Storage (on-unit) | 200Ah @ 48VDC (up to 42.75 kWh) | 400Ah @ 48VDC |
| Energy Storage (ext. rack) | Up to 153.9 kWh via separate Energy Storage Rack | Up to 153.9 kWh via separate Energy Storage Rack |
| Mappable Dry Contact Alarms | 26 | 26 |
| Emergency Depth of Discharge | 100% | 100% |
| Dead Start Capability | AC or DC | AC or DC |
| Dimensions (W x D x H) | 19" x 24" x 84" | 19" x 24" x 84" |
| Weight (fully configured) | 850 lbs (386 kg) | 850 lbs (386 kg) |
Who the ZPM Serves in Telecom
Regional carriers, independent tower companies, and towercos
Tower companies managing passive infrastructure for colocation or anchor tenant arrangements face the same power cost pressures as carriers, with fewer centralized resources to manage them. The ZPM’s standardized rack-mount form factor and preintegrated design enable faster deployment and lower per-site maintenance burden — particularly relevant for operators managing geographically dispersed sites across varied climate conditions.
WISPs and fixed wireless operators
Wireless internet service providers operating rural and exurban fixed wireless networks often manage sites in areas with the least reliable utility infrastructure and the highest per-truck-roll cost of access. The ZPM’s battery-first architecture and IntelliCore remote monitoring are a natural operational fit for operators who need maximum uptime with minimum physical presence. The WISP community, including members active in WISPA and participants in industry events such as WISPAPALOOZA, has been among the earliest adopters of battery-first power management at the tower level.
Neutral-host and shared infrastructure providers
Neutral-host operators carrying traffic for multiple carriers face simultaneous SLA obligations to each tenant. A power failure at a colocation site triggers multiple contractual exposures at once. The ZPM’s extended runtime, predictive monitoring, and real-time network operations team visibility reduce the risk of the power events that create those exposures.
5G densification deployments
New 5G site builds — particularly high-density urban deployments with Massive MIMO equipment — require backup power designed for higher load profiles than legacy 4G infrastructure. The ZPM 2 scales to 9 kW of serviceable load and the ZPM 3 (in development) reaches 13.5 kW, covering the power requirements of high-density 5G deployments. For sites requiring runtime beyond standard on-unit capacity, the Energy Storage Rack provides up to 153.9 kWh of total storage.
The ESG Case: 90% CO2 Reduction Across the Tower Portfolio
For publicly traded tower companies and carriers with published sustainability commitments — including those with Scope 1 emissions reduction targets — the ZPM’s environmental profile is a meaningful secondary benefit that is directly quantifiable.
Replacing generator-first operation with battery-first operation reduces CO2 emissions by up to 90% over a 10-year deployment compared to legacy configurations. Evoltix’s CapEx/OpEx analysis, based on empirical IntelliCore data from active customer deployments, documents savings of $650,000 over 10 years per site when comparing an Evoltix ZPM-equipped configuration against a traditional diesel-forward setup. For operators managing hundreds of tower sites with ESG reporting obligations, including annual sustainability reports aligned with GRI, SASB, or CDP frameworks, the fuel consumption reduction from ZPM deployment translates directly to measurable Scope 1 emissions reductions across the portfolio.
If you operate tower infrastructure and want to understand what ZPM deployment looks like for your network, including a site-specific OpEx model or total cost of ownership analysis, an Evoltix application specialist can work through the numbers with you.
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