How to calculate Solar Panel, Battery and Inverter?

When you plan to install solar panel, battery and inverter, then you must be wondering about how to decide the capacity of these components. On the basis of our practical experience, below guide will help you.

Step 1: Load Calculation

The best way to calculate load calculation is to use best quality clamp meter. Let’s assume for this calculation we will use a clamp meter that will support 600A . Using this clamp meter, we can calculate power consumption of home, office, shop, school, medical clinic, & petrol pump, etc. Follow the below steps to Calculate the power consumption:

  1. Turn on all the appliances
  2. Use clamp meter in phase wire of electric meter

While you use clamp meter, it shows power consumption in Amp. Such as 5Amp, 10Amp, & 20Amp, etc. Indian grid voltage range starts from 220V-240V. But you must check voltage as well using this clamp meter.

Load Calculation = 220V * 5 A

                             = 1100W

Step 2: Backup Time

In above steps, I have calculated the power consumption. On the basis of this calculated power consumption, we should know how many hours you may want to run appliances after power cut. If your answer will be 4 to 5 hrs. That means:

Battery Storage = Total Load * Backup Time

                          = 1100W * 4 hrs.

                          = 4400W

Also read: How to Calculate Inverter Battery Backup Time?

Step 3: Battery Capacity

In above steps, You will know about your required battery storage. There are two types of battery technology in India – lead acid battery & lithium battery. In lead acid battery, 150Ah lead acid battery is the most popular battery for homes and businesses. One 150Ah battery stores 1300 Watt. That means, you need

Battery Capacity = Required Battery Storage / Battery Storage

                            = 4400W / 1300W

                           = 4 Batteries

Generally, 4 batteries of 150Ah comes in 48V.

In case of lithium battery, you need only one battery that comes with 5kWh, 48V.

Also read: How to Calculate Battery Capacity for Inverter?

Step 4: Inverter Capacity

In above steps, you will know both the battery capacity and voltage. According to battery voltage, capacity, and power consumption. In simple language, I need here a 48V & 5kW inverter.

Inverter Capacity = Load  + Load * 20%

                             = 1100W + 1100W * 20%

                             = 1100W + 220W

                             = 1320W

That means, you need around 1.3kW inverter capacity.

Step 5: Solar Panel Capacity

Finally, you need to calculate the solar panel capacity. We always know that solar panels generates DC voltage (22V to 50V). In simple terms,

Solar Panel Capacity = 3 * Battery Capacity

                                  = 3 * 600Ah

                                 = 1800Watt

That means, you need 1.8kW capacity of solar panels and the highest wattages of solar panels in India is around 540W. If you choose these solar panels, then you will need around 4 solar panels for charging your battery as well as run your home loads.

29 comments

Youngbuin jean martial

Youngbuin jean martial

How to calculate solar batteries and inverter

John Whyte

John Whyte

My load is 2000w run for 24hrs
I need Sola panels, batteries, inverter
Please help me iam from Ghana

Jyoti Sagar Nayak

Jyoti Sagar Nayak

I want totally details knowledge

Jan Kim

Jan Kim

please help to compute full set up solar panel system for the load of 1hp window type aircon.
thank you ao much

Abdullahi Abdulfatayi

Abdullahi Abdulfatayi

Please help me out to calculate of numbers of solar panels, battery and inverter to used in a shop that has a eight CCTV camera, 2 refrigerator, 15 LED bulb,four ceiling fan, 2 standing fan and 2 external light

MARTINS LUTHOR

MARTINS LUTHOR

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Muzzamil

Muzzamil

i like to install solar system at my home.

4 fans
10 led bulb
washing machine
freigde
iron

can you please send me quotation of this system

thanks
muzzamil
cell: 0324-2636303

Jivan Joshi

Jivan Joshi

We have two AC of total 2.5 ton cap. , Four ceiling fans , three tube lights , one hp motor – single phase.
Calculate load and number of panels to be used and battery required . Thanks .

on line pharmacy

on line pharmacy

My brother recommended I might like this website. He was entirely right. This post actually made my day. You can not imagine just how much time I had spent for this info! Thanks!

Ishaq Yunusa Ishaq

Ishaq Yunusa Ishaq

I need more explanation with exact example that goes direct to the point,examle Soler selection to meet up battery charging

Ali hossain

Ali hossain

Dear.i want to know that. Calculated size of solar panel.battery bank & inverter 3 phase industrial system. My load 33 Amp 3 phase system. Plz.calculated size of inverter Battery & solar panel.

Uduma Ndubuisi Ogbonnaya

Uduma Ndubuisi Ogbonnaya

I need to know more about inverter, battery and solar calculation

abed Nazari

abed Nazari

Hello to all this information about pv system.
Is very useful for me.

Ram Naresh Sharma

Ram Naresh Sharma

Please share me capacity will be in kw or .KVA.rating.

Ileni

Ileni

Helloo ! Help me on specific ,that how many lead acid battery’s required 1575 watts. And how can I get the supplier if wanna start a business of order ing the equipments of renewable energy.

Ileni

Ileni

Helloo ! Help me on specific ,that how many lead acid battery’s required 1575 watts. And how can I get the supplier if wanna start a business of order ing the equipments of renewable energy.

myo hlaing

myo hlaing

I want a solar inverter and battery cables size calculation excel software files link.please send me email.

Irfan ullah

Irfan ullah

Your calculation is not correct plz correct
Using website name electrical technology

Azhaan

Azhaan

Hii
In 96 volt inverter how many solar panels or what power can we use

Nonnyblack

Nonnyblack

Hi!
What’s the advantage of half cut solar panel over traditional single-face solar panel?

Nonnyblack

Nonnyblack

Hi!
I’ve got a question: how many 200ah lead-acid batteries will 24(440w) half cut solar panels charge?

Abdifatah Ahmed

Abdifatah Ahmed

What are the main reasons a hybrid or off-grid solar system cannot operate without batteries or a startup generator that operate with the PV system during sunshine not only for storage and backup during outages?

Abdifatah Ahmed

Abdifatah Ahmed

What are the main reasons a hybrid or off-grid solar system cannot operate without batteries or a startup generator that operate with the PV system during sunshine not only for storage and backup during outages?

Kabir Elyakub Zakirai

Kabir Elyakub Zakirai

Thanks Mr India for your input. Thanks alot we learned from your post. Please keep it up

Mehmood

Mehmood

I wish to learn more about design and installation of solar system. Please, kindly give a elaborate examples on calculations on sizing of control charger, solar panels, batteries and battery back up, inverter, Thanks alot

otsile dijo

otsile dijo

i want to leran more about solar

otsile dijo

otsile dijo

i want to leran more about solar

Fadumo Abdulaahi

Fadumo Abdulaahi

what is the calculated panels?

Wajid Ahmad

Wajid Ahmad

Q1 what is the cost of 540watt pennal
Q2 How much batteries we install for1080watt pennals
Q3 is there any install ment scheme
Q4 is there any dealership in jandkashmir
Q5 i want only such solar who charge my battery in cold and snow weather

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