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  1. T

    CHEAP NEW ORIGINAL 18650 21700 BATTERY CELLS, POUCHES AND PACKS

    I have already ordered three times (100+ cells each time) cells from Tumich, all came brand new, tested excellent, no issues whatsoever, properly unwelded. Shipping was always fast, 5 days or so to France. Some of the latest batch comes at various voltage (3.30 to 4.10V) so a bit of balance was...
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    An off-grid install in the city

    That's a nice and clean install, Bravo ! One thing, for lead acid batteries, you usually want to charge them @0.2C max or you'll decrease their lifespan quite drastically, especially above 0.5C. For a 200Ah battery, 0.2C would mean no more than 40A (200*0.2) usually. Moreover, as your battery...
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    Off grid standalone electricity supply project

    Hello, vk4bxi is right, if you get 178V it is because you have a modified square wave inverter, and not a pure sinewave. It is allright for most appliances, but some don' t really like it much (such as power tools). Regarding the 18650 cells did you got through the 18650 post on ES ? - The...
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    off grid solar e-scooter charging facility

    Hello bobc, Glad to see another person with experience in solar then ! Sorry to have been a bit harsh, but I have to say your system is quite inefficient overall from my perspective as a designer of an off grid system, with no interest in feed in tariff whatsoever. You provided very little...
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    Solar Charger Built For E-bikes

    Hey st35326, I think no need to be perplex of people with solar and no batteries though, they are not doing solar to be offgrid at all, nor most off them do even actually understand how it works, as nowadays solar has been sold has a good money investment to people that are eco minded (or even...
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    Solar charging on ebike tour?

    Hello, No it will not work, because there is no inverter capable of working on a solar kit that has no battery (in your configuration your bike battery is considered as load, not battery for the solar system). Moreover, your solar panels are in DC, your battery in DC, so last thing you want is...
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    off grid solar e-scooter charging facility

    Hello bobc; Interesting project you have going on, always fun to play around with solar and batteries. From my experience working on solar systems, here are some tips for you, many solutions to improve your system, it is really up to what you want and your budget. Regarding the mppt, I think...
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    Crystalyte APM Setting Change - Now No Power

    It is quite an old thread, but if it may help people with the same crystalyte APM display "bug" as I found, it's worth sharing. Crystalyte Controller is 36-48V40A and 25A (EB312-C-2) Bug : When the controller is set to Assist(PAS), then back to Speed(Throttle), the display shows display mode...
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    Solar Charger Built For E-bikes

    Hello st35326 I am a tinkerer as well especially in the field of solar energy and weird battery configurations :D ... Far from me to suggest you to go through the crazy net metering application ! I tried to find something about self consumption in the US and its legality but can't find...
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    Solar Charger Built For E-bikes

    Hello, Good idea to solar charge, but I would use a grid tie inverter, a cheap one. They are not hard to come by at least in Europe, In the day, all the electricity produced by the panels will be available to the house. All the electricity not used is just not "produced". You can plug your...
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    Using a Computer UPS as a Solar Inverter

    Hey steveo, Thank you for sharing about the ups, it is definitely a great idea ! May I suggest you have a look at Dr Angel thread about homemade 18650 battery pack ? For the future at least... Are your batteries brand new ? Lithium is now much better to use for solar, and considering you...
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    48v 30ah battery Best cell config? BMS? Controller?

    Hello, Riding at 20 mph with my foldable bike (48V 13A limited), I get around 4h autonomy (80 miles) with my 13s9p (48V 26Ah) pack that uses 18650 LG MG1 (2900mAh). I do pedal a bit, and it's mostly flat here. In 48V I can reach 30 mph. Slowly but I get there (only 13A max). I doubt you'll get...
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    Possible answer for charging ebike batteries from solar?

    Hello Jonathan ! On the product, i don't think it has a CC-CV algorithm for Li ion charging. So it should not be used for charging li ion without this function, only a voltage limiter is not enough. It can be done but not recommended, and not sure your li ion protection circuit would like that...
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    Homemade Battery Packs

    I have to thank everybody in this thread, and a big one to DrkAngel, I have been experimenting a lot with reusing laptop cells and I am thrilled by the results, already three bikes equiped. It has been a big inspiration, and i hope soon to share some of my work on cell soldering, when i finally...
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    50 Cell 18650 Charger and Capacity Tester

    Not sure about hobostove, but I can see many reasons myself : - free or almost free (we can't all make the $$$ American make) - Reuse means much less impact on the environment for such a product. Ever wonder who dig your lithium and what are their working conditions, and where are your still...
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