## Design of solar panel / battery bank and inverter

**This MS Excel spreadsheet calculates the following:**

- Total Demand Load
- Size of Solar Panel
- Select Type of Connection of Solar Panel
- Select Rating of Each Solar Panel
- Energy from Solar Panel as per Daily Sun lights
- Size Battery Bank
- Select Type of connection of Batteries in Battery Bank
- Size of Inverter

Software: | MS Excel Spreadsheet // Calculate Size of Solar Panel, Battery Bank and Inverter |

Version: | 22.8.2012 |

Developer: | Jignesh Parmar |

Size: | 59.5 Kb |

Price: | Free |

Download: | Right here | Get Download Updates | Get Technical articles |

Foluso Omolewa

This tool is of immense help Thank you for your effort. Could there be a mistake in the sizing of the inverter The calculation is given in kw thereby making the inverter very large. Can you please comment on this. Thank you.

Nirav

I have seen the excel sheet, you have prepared for design of solar panel, inverter and battery bank and it is awesome.

Here, my application is little different on solar water heater.

I want to maintain the 70 C temperature of 50 liters (approx) water using 500 W DC heater for 24×7.

I want to size the solar panel, battery bank, solar charge controller.

Please kindly support.

Anadi

Excellent initiative and great work by Jignesh Parmar.

Can I have your contact nos, as i have to discuss a project where I find the no of batteries and Panels required is very large.

herry

Hi Sir can you plz provide the calculation formulas for this excel.

herry

Hi Sir can you please provide the calculation formulas of this excel.

Parveen Kumar

i can’t download this…plz help me…

Adem Ay

i glad to you, its very useful, i will try it as soon as

Edward Gilmour

In considering a stand alone system where the battery is supplying all of the energy as the sun goes down; then consider solar PV as the recharger. It need to be addressed in the order Load + losses => Battery; then charger & PV solar; then consider days without sunlight and multiply accordingly.

The issues are further complicated by considering the battery banks maximum charge current.

Do that with lead acid and it gets truly massive!

kamel shahpo

excellent work

Cosmas Byela

Hi! I cant downlod the sheet link for calculator sixe of Solar pannel, Battery bank and Inverter.

Please help me.

Cosmas

Amit

Hi ,

Nice work still few things I would like to explain .

Consider the power factor of Not only UPS but also for batteries .example.

1000 va output will be 700 watts

700 watts/.85 = x ▶ invt eff.

X/.65= Y▶ batt. Eff.

Y/Vdc = Z ▶ vdc is no. Of batteries x volt of battery.ex 12 volt x 3 battery= 36 vdc

So Z x (Backup time needed ) say 3 hrs

So for example it comes 15

Multiply by 3 hrs

So backup is 45 Ah

HENCE , 3 BATTERIES ARE NEEDED FOR A 700 WATT LOAD ON A 3 BATTERY SYSTEM (36 VDC) for 3 hrs backup.

Mail me at : amit@elnova.com

http://www.elnova.com

,

Nice work still few things I would like to explain .

Consider the power factor of Not only UPS but also for batteries .example.

1000 va output will be 700 watts

700 watts/.85 = x ▶ invt eff.

X/.65= Y▶ batt. Eff.

Y/Vdc = Z ▶ vdc is no. Of batteries x volt of battery.ex 12 volt x 3 battery= 36 vdc

So Z x (Backup time needed ) say 3 hrs

So for example it comes 15

Multiply by 3 hrs

So backup is 45 Ah

HENCE , 3 BATTERIES ARE NEEDED FOR A 700 WATT LOAD ON A 3 BATTERY SYSTEM (36 VDC) for 3 hrs backup.

Mail me at : amit@elnova.com

http://www.elnova.com

Albert Allotey

Hi i cant download the excel sheet. link takes me to https://app.box.com/s/jgvhc07ssbap7x6udgwq and there’s nothing there. please help

mayank tanwar

To calculate the size and power backup solution Batterybhai.com provides Power Calculator.

Sergio B. Diasana

solar technology is the the best power savings at our time.

Sergio B. Diasana

It is a very good site, to enhance our expertise and ability and be more professional.

oladayo

i like this site

Steven | PSE Battery warehouse

Nice spreadsheet. This will definitely come in handy when calculating the size of your battery bank.

Tunji Iromini

Hi,

I observed that a corresponding increase in the battery backup time (autonomy) doesn’t affect the sizing of the solar arrays. In essence, a 24kW solar power (200W by 48V panels) is not affected despite increasing the number of days of backup power. The number of batteries increase but not the panels. I was expecting the solar panel side to flag an error but it remained green (ok) despite varying days of backup. Increase in batteries should automatically result into more panels to ensure batteries are adequately charged.

Can you comment on my observation please?

Regards,

Tunji

solar magics firm

Very true, there’s no way you can add the batteries to cater for the days of autonomy and you fail to add solar panels. If only you add batteries, the system will not be getting enough charges therefore it is a must for solar panels to be added to the system.

Ajay Prakash Singh

dear sir,

I am new in this field, and i want to learn how this calculator works for calculating the load. when i am using it, it ask for the password. i am having some knowlege of it but wish to know the way that how to calculate the size of solar panel, battery and inverter.

please help

abaho emma

thank you for your lessons and your calculations. i know how size now

Pranav

useful calculator…should include DC load option…

Ata Ur Rahman

dear

this tool design on AC load but i need a tool that design for DC load.

or any one can tell me that relation between DC and AC load.

how i convert 1500W DC load to AC load to use this design tool

DC….?…=AC…?…

Taif

Hello Everyone and Technical members,

I have a project of Installing Solar Power System on a Terris of a building having an area of 3000 sq ft. It is a 10 storey building having three flats/apartments on each floor with each flat/apartment has a load of 18420 watt hours or 18.42 kWh.

It’s my project so I am facing problem to calculate what types of panels I should use to produce that much voltage by panels with installing batteries..

Please help with this with the appropriate solar panel strategy or planning.

You can also email me for further details if you want for this purpose.

Thank you

Ivan Mugabi

Interested in solar calculator

Ebenezer Koranteng

I am yet to try your calculator.

Thanks!

Faruque Ahmad

Great tool!

I tried to use this calculator for sizing solar panels in hybrid system for micro GSM BTS, but size of invertor is too big for total load of 500 W. For total load of 500 W with operational time 24 h per day, calculator gives size of invertor about 555 KW. I do not understand why. I guess there is mistake in cell which shows KW.

Regards,

Femnas

I think there is some mistake….

bath

This is the great site for EE in the web i have ever seen! Thanks to all the developers for sharing their great works.

prashantrider

it goes on this link https://www.box.com/s/jgvhc07ssbap7x6udgwq

the link doesnt work so cant download, ????

Edvard

You will see ‘Download’ button on top-right.

prashantrider

cant download ??

sajancq

Very useful, Thank’s

Azra

Great tool!

I tried to use this calculator for sizing solar panels in hybrid system for micro GSM BTS, but size of invertor is too big for total load of 500 W. For total load of 500 W with operational time 24 h per day, calculator gives size of invertor about 555 KW. I do not understand why. I guess there is mistake in cell which shows KW.

Regards!

Azra

gsrsharma

it’s free tool but password protected !!!! … delicious food but in the showcase !!!

etradz

Fabulous work.. This surely is a time saver..

Regards

Nick

veerugvs

Really excellent job u r doing for the electrical engineers

Mostafa Sharifi

Thanks alot

sephirothn

Very useful, Thank’s

zeeshan541

can tell u after using the tool

projects416

Great Work! Thanks a lot

Edvard

You’re welcome! All credits goes to mr. Jignesh Parmar!