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Bought a cool-looking voltage and current meter for monitoring solar power usage in the shed. It can handle up to 300 volts, 100 amps and displays volts, amps, watts, watt-hours, amp-hours, time, temperature and more. It's powered by the solar panel so it's always on during daylight. An easy-to-read backlit LCD shows all the data you need. Costs about $25.
DC300V 100A Digital Voltmeter Ammeter Power Meter Car Battery Capacity Tester C https://ebay.us/qBQS6a

By Julian

Youtuber, shed dweller, solar charge controller aficionado

17 thoughts on “300 volt, 100 amp meter for solar panel”
  1. Avataaar/Circle Created with python_avatars AlivisoBob says:

    IIt brings me great joy to see you review these types of boards, and when I purchase one, I am left with my own personal video manual narrated by Mr. Julian. Do you happen to have a video that demonstrates a board sensing 120VAC, current, and frequency? I am in the market for creating a sensor that will notify me when the grid power goes out.

  2. Avataaar/Circle Created with python_avatars SSDi Boi says:

    So is a 300 watt solar panel 240 volts

  3. Avataaar/Circle Created with python_avatars Sanwizard says:

    Sold out. Is there another vendor?

  4. Avataaar/Circle Created with python_avatars Bob Wareham says:

    WHAT IS GOING ON WITH THE ANNOYING LEDs????????

  5. Avataaar/Circle Created with python_avatars movax20h says:

    No USB for computer data logging. So close to perfection. Damn.

  6. Avataaar/Circle Created with python_avatars Maximo474 says:

    Cheaper on AliE….

  7. Avataaar/Circle Created with python_avatars Black Arrow says:

    Please bring back the green cutting mat โ™ฅ

  8. Avataaar/Circle Created with python_avatars Mike Hawkins says:

    Chinese companies protecting their products against those that might rip-off the design, that makes me chuckle. I wonder it was theirs to start with.

  9. Avataaar/Circle Created with python_avatars MrCalldean says:

    You monster…. not taking the protective plastic off?!

    I have a compulsion to pull them off, it's got me in trouble more than once when I've ended up hitting something I shouldn't while I pull them off. :/

  10. Avataaar/Circle Created with python_avatars Frenchcreekvalley .frenchcreekvalley says:

    Thank you for this video. I would be very concerned about having anywhere close to 300 volts DC sticking out there in the open, though. And, in some of your other videos you have taken time to comment about the design/quality of the both the physical and the electrical isolation between a high voltage input and the low voltage stuff. I HAD to watch ALL the way to the end waiting for it! <G>

  11. Avataaar/Circle Created with python_avatars Simon Howroyd says:

    The trace separation looks questionable for 300V!

  12. Avataaar/Circle Created with python_avatars raja330seh raja330seh says:

    Available in india

  13. Avataaar/Circle Created with python_avatars fumthings says:

    looks like resistance was the resistance of the load with current running through it.

  14. Avataaar/Circle Created with python_avatars George Cohn says:

    Depends on the EV battery pack. I think my Tesla has a 450 volt 75KW battery pack. Cool device, I might get one to monitor the voltage and current on my landscape lighting system. It uses two 100 watt panels in series, an MPPT controller and two 125 amp flooded batteries in parallel.

  15. Avataaar/Circle Created with python_avatars Robert Wooten says:

    Would 1 or 4 of these handle the surge current of a cranking V8 motor without diodes? Would be amazing to use 2 of these modules with a VSR voltage sensor relay intended for dual batteries installations. Of course you know it would isolate two batteries under voltage and merge those same batteries above 13 volts.

  16. Avataaar/Circle Created with python_avatars Robert Wooten says:

    What would be the best blocking diode is best if I have a 14S 52v backpack battery and I want to use this as a power monitor the output would go to the EV input port. Would there be a blocking diode rated for 60v 15a to protect the external battery? Thanks

  17. Avataaar/Circle Created with python_avatars James S says:

    Thank Julian.

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