diy solar

diy solar

Recent content by Bhupinder

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    DIY All-In-One Solar Generator - Control Board

    Some brilliantly cleaver ideas @Hedges . Sound like pro design engineer at work. Thanks for sharing them. Let me incorporate changes and come back.
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    DIY All-In-One Solar Generator - Control Board

    Okey Guys, apologies for being away all this while. I'm in travel with limited connectivity, so please bear with me. Lots of discussions going around, trying to sum them up w.r.t the design the way I understand them:). Few changes incorporated: 1) Transistor...
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    DIY All-In-One Solar Generator - Control Board

    Thanks @Hedges . That's the reason I opted for a 12V "Safe" portable system. No direct interference with line AC as well. I believe we are playing with a very basic and safe system - which @ max could smoke black with a "Pop" sound from some cap - nothing more. I don't know, I'm not fan of...
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    DIY All-In-One Solar Generator - Control Board

    Not So much, just the component costs have exceeded that of a decent BMS. May be Yes. How do you suggest to go about it? Enroll @ University? If not - what did you make out of things we are trying to do here? No, I don't intend to write my thesis around physics behind functional principals of...
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    DIY All-In-One Solar Generator - Control Board

    Here's the Spec sheet: That R7 with 47K was there just to supply replenish/leakage current of ~1mA(45-12V) to Capacitor C1-> Mosfets. My understanding is that Zeners work on Voltages and not on current. Once the substrate collapses with zener voltage put across, impurities should release all...
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    DIY All-In-One Solar Generator - Control Board

    Ahh, got caught up with a few things;). :ROFLMAO: Absolutely, there's surely some "rush-up" work that I despise. Thanks for the fine eye! P1 is the same connection originating from first positive electrode on the battery going all the way to Balance Mosfet M4. Since resource is the same -...
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    DIY All-In-One Solar Generator - Control Board

    It's delight to hear engineering stories and revelations behind pursuits of precision. Although its pretty obvious but never realized what it takes to put accuracy and precision into electronic components. A Big thumbs up (y) just for the passion. By the way I rearranged schematic as per...
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    DIY All-In-One Solar Generator - Control Board

    Yes Cal, its intentional to activate balancing only during charge cycle. We can let it be there across all phases and hence the small balance current. True, trying to rearrange things so we just have to deal with one ground for internal circuitry while the other ground comes into picture only...
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    DIY All-In-One Solar Generator - Control Board

    PV negative is not connected directly to microcontroller but it latchges to SCC ground when mosfets are activated. SCC is internally hardwired with Battery ground - which is common ground for the microcontroller also. I am not sure if we can read less than '0' volts at microcontroller inputs...
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    DIY All-In-One Solar Generator - Control Board

    Update Thanks @BiduleOhm for the critical review. Corrected Mosfet charging mechanism by using optocouplers as drivers which shall utilize charge from PV source for the purpose. Since now multiple drivers are to fed - beefed up current from Zeeners as well. For the Voltage divider network...
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    99 Yinlong motorhome bank

    Checked some of your videos. You are good at your work Brandon! What line of work do you originally belong? Would be interested to see how this Power Bank takes up the shape. TC
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    DIY All-In-One Solar Generator - Control Board

    Hi, here's the draft schematic for 4S Cell balance module. Idea is to monitor voltage of each individual cell ( via voltage divider) and short local electrodes once voltage reaches pre-determined top charge. While exact algorithm for balancing can be done in microprocessor, dissipating...
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    DIY All-In-One Solar Generator - Control Board

    Thanks @Hedges for all those suggestions. They are kind of on the list and more. Got LM335s for temp and Hall effect sensor for current monitoring. This board and automation control is a very late afterthought, had installed analog battery and power monitors already. Still its fun to have the...
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    DIY All-In-One Solar Generator - Control Board

    Vds and Vds are originating from the same source - shouldn't they be at the same potential/ common reference? And once Gate saturates from Vgs and start to conduct, complete system would be at battery ground reference anyways.:rolleyes:
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    DIY All-In-One Solar Generator - Control Board

    Here it is: Are we good to go onto the next module (y)
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