Thank you Logan, glad it was helpful. South Africa is advancing quickly in renewable energy with our national grid failures. Chinese companies have so many specialists in DC Products, we used to get products from European countries, but they themselves manufacture there and just OEM their brands. Its my passion to dig deep into solar energy and share my experience and quality products. If you have TikTok follow me there on @johanmoesh I dont put all videos on TH-cam. Will in the future create more on TH-cam
great video, i saw lots of videos on this topic on youtube but many of them were non technical persons and could not satisfy me, your video gave me 100% understanding, if possible please mention how to identify polarized and non polarized dc breaker physically
@@Iqbal_khan-9 it would be best be shown on the diagram. Flow in one direction are Polarised breakers, also has magnet in, use small washer to feel if there is a magnet pulls or push. Normally Non-Polarity breakers will mention it clearly on it and show + / - on each pole
@@lowtech_1 it certainly is, therefore just stay away completely from polarity breakers and get to Non-Polarity breakers. Source is the power towards the Load. Source would mostly be PV Panels, load would be MPPT towards battery or inverter convert DC to AC(load). Another reason why DC Breakers aren't commonly uses from battery to the inverter and that Fuses is still in use. Because the batteries would be the source towards the inverter(load). Non Polarity breakers are used by battery manufacturers, as it certainly has benifits compared to fuses. Thermal protection, overload protection and short circuit protection.
Sir, what about a breaker in between the charge controller and the battery? The direction of current flow is from the charge controller to the battery. There is the myth that the battery has the higher potential and for this reason , the DC breaker ++ should be directly connected to battery +. But I still do not agree . I hope they are not mistaking the charge controller with the inverter . Sir, throw more light .
@@soloado5084 great question, for this exact misunderstanding of polarity DC Breakers, we have to move on towards Non-Polarity DC Breakers that are designed specifically for DC Current. But the basis are still the flow of the current, the source would be the PV Modules to the batteries. Think of the batteries as a dam of water and the solar panels is the rain flowing down the river into the dam. Although the dam has much more cubic meter of water, the flow would only be out once the dam is full to overflow or pumped out. I won't declare this as excacly but in principle the it is the same.
They are cheaper, if used correctly they do the job, but it is very confusing for lots of people, installers etc. The problem will be human error, lots of it in South Africa,
It is very difficult to say on most brands, but use a washer, if it has magnet inside it is polarity breaker. Search and seek manufacturers specs. I want to say if they don't have + and - marking on the terminal screws it mostly would be Non-Polarity MCB
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I went to your site for this paper and found much more great info
Thanks much
Logan, Tennessee, USA
Thank you Logan, glad it was helpful. South Africa is advancing quickly in renewable energy with our national grid failures. Chinese companies have so many specialists in DC Products, we used to get products from European countries, but they themselves manufacture there and just OEM their brands. Its my passion to dig deep into solar energy and share my experience and quality products. If you have TikTok follow me there on @johanmoesh I dont put all videos on TH-cam. Will in the future create more on TH-cam
These polarized breakers are confusing and dangerous..
great video, i saw lots of videos on this topic on youtube but many of them were non technical persons and could not satisfy me, your video gave me 100% understanding, if possible please mention how to identify polarized and non polarized dc breaker physically
@@Iqbal_khan-9 awesome and glad it helped.
@@Iqbal_khan-9 it would be best be shown on the diagram. Flow in one direction are Polarised breakers, also has magnet in, use small washer to feel if there is a magnet pulls or push. Normally Non-Polarity breakers will mention it clearly on it and show + / - on each pole
@@Iqbal_khan-9 th-cam.com/video/QJf6Ee-VP60/w-d-xo.htmlsi=RE4Kqsmfj5NgMUOV
@@ltvtech tnx bro
It's very confusing, I have to imagine the load is a battery, and work/wire from there. Otherwise it does my head in 😮
Thanks for video.
@@lowtech_1 it certainly is, therefore just stay away completely from polarity breakers and get to Non-Polarity breakers.
Source is the power towards the Load. Source would mostly be PV Panels, load would be MPPT towards battery or inverter convert DC to AC(load).
Another reason why DC Breakers aren't commonly uses from battery to the inverter and that Fuses is still in use. Because the batteries would be the source towards the inverter(load).
Non Polarity breakers are used by battery manufacturers, as it certainly has benifits compared to fuses. Thermal protection, overload protection and short circuit protection.
Sir, what about a breaker in between the charge controller and the battery? The direction of current flow is from the charge controller to the battery. There is the myth that the battery has the higher potential and for this reason , the DC breaker ++ should be directly connected to battery +. But I still do not agree .
I hope they are not mistaking the charge controller with the inverter . Sir, throw more light .
@@soloado5084 great question, for this exact misunderstanding of polarity DC Breakers, we have to move on towards Non-Polarity DC Breakers that are designed specifically for DC Current.
But the basis are still the flow of the current, the source would be the PV Modules to the batteries.
Think of the batteries as a dam of water and the solar panels is the rain flowing down the river into the dam. Although the dam has much more cubic meter of water, the flow would only be out once the dam is full to overflow or pumped out.
I won't declare this as excacly but in principle the it is the same.
Thanks for this video
Great pleasure
What about those solar charger/inverters which provide current to the battery while charging and take out the current when load runs
@@FayzanKhan-h9h non Polarity breakers has to be used on them.
Why do polarized breakers even exist? Is there any advantage of a polarized breaker over a non polarized breaker?
They are cheaper, if used correctly they do the job, but it is very confusing for lots of people, installers etc.
The problem will be human error, lots of it in South Africa,
What about those breakers with indications as "line" on the top and "load" on the bottom. Are they also polarized breakers?
It is very difficult to say on most brands, but use a washer, if it has magnet inside it is polarity breaker. Search and seek manufacturers specs. I want to say if they don't have + and - marking on the terminal screws it mostly would be Non-Polarity MCB
Are all mccb's non polarized?
All, don't think so, but make sure from manufacturers, don't trust distributors. Most don't even know the difference