solar energy using 20 nos of 80wp for 36v inverter

[kyrietec]

Can it be possible to use 20 numbers of 80w solar panel open circuit voltage 21.5v for 36v inverter. ?

 

[paucoma]

Hi kyrietec,
To be able to help you find an answer to your question, some technical details on the Inverter you are planning to use are required. Maybe you could post the link to the datasheet.

36 is low voltage (much lower than the grid voltage) and it is a multiple of 12 which makes me think that the inverter you plan on using will run from batteries of 36 volts.

In this case your setup requires a charge controller which would attach to the panels on one side, the batteries on the other. Your inverter will connect to the batteries on one side, the "grid" on the other side.
Have a look at [this article](https://science.howstuffworks.com/environmental/energy/solar-cell7.htm) for an introduction.
**broken link removed** <-- Image from How Stuff Works dot com article, which was referenced.

If the inverter is directly connected to the panels and the inverter is going to be specified as 36volts, then you can make a series/parallel combination to be able to work at 36 Volts.
- for example : 2 panels in series forming a string, 40 of these strings in parallel to use all of you panels.
+ all strings need to be the same length.

Cheers,

 

[kyrietec]

Thanks Paucoma. It is not possible to connect 20 nos of 80wp for 36v system,because three nos will be connected in series .All the series in parallel.You can use 18 nos or 21 nos not 20 nos.

- - - Updated - - -

Thanks Paucoma. It is not possible to connect 20 nos of 80wp for 36v system,because three nos will be connected in series .All the series in parallel.You can use 18 nos or 21 nos not 20 nos.

 

[paucoma]

I think there has been a confusion.
Where are you getting 3 from ? (the image is just an example, not suggesting that your series will be identical)

A PV Panel with open circuit voltage of 21.5 Volts will have its maximum power point voltage around 17.5 Volts.
80 Watts peak at approximately 17.5 Volts = approximately 4.5 amps

If you put 2 of these panels in series you will have a string of
- Open circuit voltage = 43 Volts
- Maximum power point voltage = 35 Volts
- String current at maximum power = 4.5 Amps

Currently with these 2 panels you only have 160Wp. You have 20 panels in total which you want to use to have a total 1600 Watts peak.

Place 10 of these strings in parallel (protect your strings with a fuse, 10 amps per string for example) and you will have the combination you are looking for.
- Array Open circuit voltage = 43 Volts
- Array Maximum power point voltage = 35 Volts
- Array current at maximum power = 45 Amps

But if it is good enough for your inverter is all just guess work, because we don't know your inverter characteristics.

Anyway, from your comment looks like you already have your answer, best of luck with your tests.