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DIY Homemade 12V to 48V DC-DC Converter Solar Panel Battery Electric Bike eBike Charger PC Board
February 19th, 2010 | 
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This circuit converts 12V DC from solar panel and battery storage system and produces 48V DC (60V) to charger the battery pack in my DAYMAK Austin electric bike. Faster charge than OEM charger. Great for someone driving an RV from campground to campground with an e bike on the back for short trips once they get to their destination. This circuit will keep the batteries fully charged and ready to go. You can also use this with a 12V battery charger charger if you original charger has given up the ghost. Or you could have a solar panel charge a battery during the day and use the energy stored to charge your electric bicycle or EV for “free” at night. Automatic circuit switches to trickle charging after battery is completely fast charged.
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You’re going to need a huge solar panel if you’re going to be drawing 10-11 amps from 12 volts. That’s between 120-132 watts.
Yes the TL494 drives four mosfets. cool eh!
Do you use the TL494 PWM driver?
Yes I designed the circuit and made up a board layout. Etched and drilled the PC board and assembled the complete unit.
How many amps do you want it to output at 24 to 36 volts??
did u build this, i need to do something like this for my power supply im building
i would like to turn 8 volts 320 A to 24 or and 36 v for experimenting and electrolysis rigs
Thanks for the free info!…keep it coming… San Diego Artificial Turf… Let me know how i can help.
Exceptional work, enjoyed the information given here. Thanks!
A Treehugger report claims that solar panels may not be as environmentally-friendly as was initially thought given the potential for waste generated from the life-cycle of a solar panel. The article discusses the early development of a recycling plan as a plausible solution.
Being in diy solar panels for 22 years now, its great to know that I can still learn new things from content like this. Thanks for your thoughts, I’ll be back soon for more!
Wow that is a great point, thanks for pointing that out! I’ll be back again soon, I hope to see some more great content in the future from you!