Tech & Engineering

Telecom Power & Passive Infrastructure Calculators

Genset, fuel, rectifier, battery, breaker, transformer and site-load calculators. Free calculators with formulas and worked examples.

Site energy and fuel

Telecom Site Energy Cost Calculator (Grid, Diesel, Solar)Enter the bill kWh, diesel litres and prices. Choose how the site is powered and see the total energy cost and cost per kWh.Generator Fuel Consumption CalculatorHow much diesel will your genset burn at a given load?Genset Fuel Efficiency and Theft CheckIs the diesel you filled really being burned?Generator Sizing Calculator (kVA)Size a diesel generator for a telecom site or building load.Diesel Tank Autonomy CalculatorHow long can the genset run before the next fuel delivery?Generator Runtime from Grid Outage CalculatorGrid down for hours a day? See how long the DG must run.Diesel vs Grid vs Solar Cost per kWhWhat does a kWh really cost from each source?Telecom Site CO₂ Emissions CalculatorCarbon footprint of the site's energy mix.

Batteries and rectifiers

Telecom Battery Bank Sizing Calculator (48V)How many Ah do you need to keep the site up for a given outage?Battery Autonomy CalculatorHow many hours of backup does the existing bank give?Battery Charge Time CalculatorHow long until the batteries are back to full after an outage?Rectifier Sizing Calculator (N+1)How many rectifier modules does the site need?DC Load Current and Daily Energy CalculatorWatts, amps and kWh for telecom DC loads.

AC distribution

3-Phase Current Calculator (kW, kVA to Amps)How many amps does your load draw?Circuit Breaker Size CalculatorPick the next standard breaker size above your load.ATS Panel Rating CalculatorSize the ATS to carry the full site load safely.Power Factor Correction Calculator (kVAR)Size a capacitor bank to avoid power-factor penalties.3-Phase Cable Voltage Drop CalculatorCheck whether the cable run is too long for the load.

Transformers

Distribution Transformer Sizing CalculatorChoose the kVA rating for a site or building transformer.Transformer Current and Fault Level CalculatorFull-load amps and fault level for a distribution transformer.

Solar

Solar PV Sizing for a Telecom SiteHow many kWp and panels does the site need?Solar Savings and Payback Calculator for SitesIs solar worth it at your site, and how fast does it pay back?MPPT String Sizing CalculatorMake sure the string voltage stays inside the charge controller's window.

Site cooling

Telecom Shelter Cooling Load CalculatorHow many tons of cooling does the site need?

About these calculators

Calculators for passive infrastructure and telecom site operations: generator fuel and sizing, ATS and breaker ratings, 3-phase current, cable drop, transformer loading, power factor correction, rectifier and battery sizing, solar hybrid sites and earthing. Estimates only; electrical work must follow local codes and be carried out by qualified staff.

Each calculator explains its formula, includes a worked example and lists its sources. Read how we check them on our editorial policy page, or browse all calculators.

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Please note: TheCalcTools gives general estimates for information and education. It is not financial, medical, legal or tax advice, and results should be checked before you make a decision. See our disclaimer and about page.