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Building a maximum power point tracker (MPPT) - The Byte Sized Engineer | DigiKey

Powering your electronics project using a solar panel can be fun, but how do you know if you're extracting and utilizing all the power a panel can provide? I built a maximum power point tracking solar charge controller to make sure I could extract all the power available from my solar panel.

Full bill of materials can be found here: https://www.digikey.com/en/mylists/list/6UR93Q1BYV Github repository with all source files can be found here: https://github.com/bytesizedengineering/mppt-charge-controller

Byte Sized Engineer channel - https://www.youtube.com/@bytesizedengineering Maker.io - https://www.digikey.com/en/maker DigiKey’s Blog – TheCircuit https://www.digikey.com/en/blog Connect with Digi-Key on Facebook https://www.facebook.com/digikey.electronics/ And follow us on X https://twitter.com/digikey

Video Chapters: 00:00 Introduction 00:27 Solar panel specifications 02:09 Measuring a power curve 04:12 Graphing a power curve 05:18 Using a buck converter SMPS 06:08 Designing my own MPPT charge controller 06:35 Using the typical application circuit of the BQ24650 07:36 Assembling the custom PCB 09:23 Testing and troubleshooting the PCB 12:03 Writing MPPT firmware 13:35 Connecting a solar panel to the MPPT charge controller

8/27/2024 1:28:21 PM

Part List

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
MOSFET 2N-CH 40V 20A PPAK SO8SI7288DP-T1-GE3MOSFET 2N-CH 40V 20A PPAK SO881664 - Immediate$5.96View Details
FIXED IND 10UH 3A 105 MOHM SMDIHLP2525CZER100M01FIXED IND 10UH 3A 105 MOHM SMD20283 - Immediate$3.41View Details
FIXED IND 1.5UH 9A 15 MOHM SMDIHLP2525CZER1R5M01FIXED IND 1.5UH 9A 15 MOHM SMD6838 - Immediate$3.41View Details
DIODE ARR SCHOTT 30V 200MA SOT23BAT54CDIODE ARR SCHOTT 30V 200MA SOT2331161 - Immediate$0.43View Details
LED GREEN CLEAR CHIP SMDLTST-C190GKTLED GREEN CLEAR CHIP SMD654884 - Immediate$0.43View Details
LED RED CLEAR CHIP SMDLTST-C190KRKTLED RED CLEAR CHIP SMD1852417 - Immediate$0.50View Details
RES 0.02 OHM 0.5% 1/4W 1206WSL1206R0200DEARES 0.02 OHM 0.5% 1/4W 12069408 - Immediate$7.46View Details
RES 0.01 OHM 0.5% 1/4W 1206WSL1206R0100DEARES 0.01 OHM 0.5% 1/4W 120610391 - Immediate$7.72View Details
CAP CER 10UF 35V X7R 1206CGA5L1X7R1V106M160ACCAP CER 10UF 35V X7R 12062226 - Immediate$2.80View Details
CAP CER 4.7UF 35V X7R 0805GRM21BZ7YA475ME15LCAP CER 4.7UF 35V X7R 080518008 - Immediate$0.97View Details
CAP CER 1UF 35V X7R 0603CGA3E1X7R1V105K080ACCAP CER 1UF 35V X7R 060317376 - Immediate$0.79View Details
CAP CER 0.1UF 35V X7R 0402CGA2B3X7R1V104K050BBCAP CER 0.1UF 35V X7R 0402334139 - Immediate$0.39View Details
CAP CER 2.2UF 35V X7R 1206CGA5L3X7R1V225K160ABCAP CER 2.2UF 35V X7R 12063807 - Immediate$1.22View Details
CAP CER 22PF 50V X7R 0402C0402C220K5RACTUCAP CER 22PF 50V X7R 040236696 - Immediate$0.50View Details
RES SMD 100K OHM 0.5% 1/16W 0603RR0816P-104-DRES SMD 100K OHM 0.5% 1/16W 0603717593 - Immediate$0.36View Details
RES SMD 499K OHM 0.5% 1/10W 0603RNCF0603DTE499KRES SMD 499K OHM 0.5% 1/10W 060310374 - Immediate$0.36View Details
RES SMD 36K OHM 0.5% 1/16W 0603RR0816P-363-DRES SMD 36K OHM 0.5% 1/16W 060315718 - Immediate$0.36View Details
RES 5.23K OHM 1% 1/10W 0603RC0603FR-075K23LRES 5.23K OHM 1% 1/10W 0603117849 - Immediate$0.36View Details
RES 30.1K OHM 1% 1/10W 0603RMCF0603FT30K1RES 30.1K OHM 1% 1/10W 0603309349 - Immediate
360000 - Factory Stock		$0.36View Details
RES 10 OHM 1% 1/10W 0603RC0603FR-0710RLRES 10 OHM 1% 1/10W 06030 - Immediate$0.47View Details

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