Great video.i have connected two strings in parallel each string has 5 panels and each panel has aroung 575 watt,48vdc and 14.8 amps.the panels i am using are bifacial.each string gives out around 14 amps and if i connect these in parallel it will give out around 28 amps.what rated mcb should i use to connect all these 4 wires i for parallel connection?plz help.thx

@ltvtech

2 ай бұрын

It is a common practice to include a safety margin of 25% to ensure the MCB can handle slight overcurrent conditions without tripping unnecessarily. This margin accounts for variations in sunlight intensity and temperature, which can affect the current produced by the panels. Safety Margin CURRENT = Total CURRENT × 1.25 28 AMPS × 1.25 = 35 amps Select the Circuit Breaker Rating: The MCB should be rated slightly above the calculated safety margin current. Standard DC MCB ratings are usually available in steps such as 32A, 40A, 50A, etc. Since 35 amps is not a standard MCB rating, you should select the next highest rating. In this case, a 40A MCB would be appropriate. Remember the fuses as well for protection of reverse current on each string 4 fuses and would be 20A Select it wisely, search Depending how you will parallel it, you would either get 2P 40A DC MCB Non Polarity.

@ltvtech

2 ай бұрын

www.amazon.com/ONCCY-Miniture-40-Overload-Protection/dp/B0CNJG91ZH/ref=sr_1_1_sspa?crid=387X092S7UA3L&dib=eyJ2IjoiMSJ9._-h0riltXijmhUZU9HnJzpeDGJFhu-nYb2xMwYEPjSD-bdBbGaCRxFzaa5CsRrA8AmveMnew3oXN65gUIZf6LhhLQmsIHW0zj4AkAQpk1rAayUEULuHxsrLQjRLDuMZjuZ4SadhOzbIGzR_CesA1OYOGrRx5iQY13p5wDP-3M2VF-cloQZnyiFr9YcoYA4qH.3YwYp-uXbeCDGYG9akhbQ6nQ21jgiJ9G34GNQ3dDp5Y&dib_tag=se&keywords=4%2Bpole%2B40a%2Bdc%2Bmcb%2Bnon%2Bpolarity&qid=1716184666&sprefix=4pole%2B40a%2Bdc%2Bmcb%2Bnon%2Bpolarity%2Caps%2C531&sr=8-1-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&th=1

I have a load 240V DC ( 20 Amp ), can I use it directly connected to the panels?

@ltvtech

2 ай бұрын

No DC Volts and AC Volts and equipment are totally different. Your DC will also change alot depending on the sun. You might look at Micro inverter if you want to work from the panels

your greeting image is misleading as it is series connection.

@ltvtech

2 ай бұрын

Thank you I see what you mean, I did edit it, not sure when it will reflect

J need for myst inverter 5,2kw 48v Mppt pro1800 1:46 Main board

@ltvtech

4 ай бұрын

Take pictures of the specs email to johan@ltvtech.co.za

Thats series.not parallel..

@ltvtech

3 ай бұрын

4 series string to Parallel see 1.31

@davidstevens7809

3 ай бұрын

@@ltvtech ok..

@ltvtech

3 ай бұрын

@@davidstevens7809 kzread.info/dash/bejne/c5tn3KeOoa3bcbw.htmlsi=Up_Sx0JoO0UdFDC4 A bit more detailed example