Engineering calculators for electrical systems

Q: What can you calculate with Merus Power’s sizing tools?

Merus Power sizing tools help estimate key parameters for power-quality and battery-energy-storage applications. They provide a fast and practical starting point for system sizing and project planning.

Q: Who are Merus Power’s sizing tools designed for?

Our tools are intended for electrical engineers, consultants, system integrators, utilities, EPC companies, and industrial facility owners. They simplify preliminary calculations and support more informed technical decisions.

Q: How accurate are Merus Power’s calculator results?

Our calculators provide reliable engineering estimates based on the information you enter. For final equipment selection and compliance verification, detailed measurements and system studies are recommended.

Q: Are Merus Power’s engineering calculators free to use?

Yes. All Merus Power engineering calculators are free to use and designed to support engineers, consultants, and industrial users during the early stages of project planning.

Q: Can Merus Power’s calculators replace power quality measurements?

No. The calculators are designed to support preliminary analysis and project planning. Professional measurements and engineering studies are still required for detailed system design and compliance assessment.

Merus Power develops free engineering calculators for electrical engineers, consultants, EPC companies and system integrators working with power quality and battery energy storage systems. Our tools provide practical engineering estimates that support system sizing, performance evaluation and more informed technical decisions during project planning.

Calculators designed for practical engineering decisions

Every Merus Power calculator is built on proven engineering principles and our experience from power quality and battery energy storage projects around the world. Our tools provide fast, practical estimates that help engineers make more informed decisions during the early stages of system design.

Our sizing tools can help you:

Estimate harmonic distortion
Evaluate battery energy storage system performance
Compare different design options
Support preliminary project planning
Identify when a detailed engineering study is recommended

Learn more about different topics

power quality problems explained

Centralized active harmonic filtering

iEEE 519 compliance guide

Round-trip efficiency explained

Choose a calculator below

Estimate key electrical parameters, compare system performance and support early-stage engineering decisions.

Merus^® Harmonic Calculator

Estimate harmonic distortion and active filter sizing

Estimate current harmonic distortion (THDi) and evaluate whether harmonics may become a concern in your electrical system. The calculator provides an easy starting point for understanding power quality and identifying when further measurements or mitigation should be considered.

Calculate Harmonic Needs

Merus^® Round-Trip Efficiency Calculator

Estimate BESS efficiency and system performance

Understand how system design influences battery energy storage efficiency. Our Round-Trip Efficiency Calculator estimates system efficiency using realistic, component-level inputs aligned with the IEC 62933-2-1 philosophy, helping engineers compare solutions more accurately.

Frequently asked questions

What can you calculate with Merus Power’s sizing tools?

Who are Merus Power’s sizing tools designed for?

How accurate are Merus Power’s calculator results?

Are Merus Power’s engineering calculators free to use?

Can Merus Power’s calculators replace power quality measurements?

Need some help? We got you!

Riku Kalliomaa

Head of Sales, Power Quality Products
Global

+358 50 3323 020 riku.kalliomaa@meruspower.com

Petri Trygg

Head of Sales, Energy Storage Systems,
Global

+358 50 549 8941 petri.trygg@meruspower.com