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    Bottom Balancing Batteries (to avoid using a BMS)

    One of the more popular questions, especially among the new folks, is "Do I need a BMS?". The reason is usually price, complexity, lack of trust in cheap BMS and so on.And the answer is always the same because it depends. For un-supervised operation 24/7 the answer is yes, for example for a...
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    Fixing the AEG CX8-50EB, battery powered vacuum cleaner

    Technically it isn't broken, so fixing means actually modifying. Enhancing the unit and getting rid of some stupid issues (from my point of view) that AEG has built into this model. Oh, and when I say AEG I mean Electrolux. AEG used to be a german company but has been bought by swedish...
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    A new reason for not using reclaimed cells emerged...

    Recently there was the question again where to get cheap 18650s. And this was my reply:http://secondlifestorage.com/t-Where-to-get-cheap-18650-s?pid=21773#pid21773 Basically I've described the issues that I have here and why buying new cells mightactually be cheaper. And this isn't new...
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    kWeld battery powered spotwelder available for pre-order again

    --- SOLD OUT FOR THE MOMENT --- I've posted this before on some occasions, there is a german guy who made a battery powered spotwelder which seems to work pretty well. The last batch was sold out but now it is available again. Videos about it can be found...
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    EU/Germany: SkyRC D400 7S 20A AC/DC Charger

    All details can be found here:http://www.skyrc.com/Charger/Multi-Channel/D400_Charger Or just ask if you want to now some specific details :) Input VoltageAC 100-240V/DC 11-18V Charge Circuit Power400W Discharge Circuit Power36W Charger Current Range0.1-20A Discharge Circuit Power0.1-5A Current...
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    Spam prevention

    Most forum softwares have some means of prohiting automated spam like we are experiencing at the moment. Maybe you should look into this. Or, if something like this is already active, there is a bug or security issue because it obviously doesn't work :)
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    Belgian power company changes AC frequency to disable solar systems

    Well, sort of :D Not as in sabotage because they don't like solar power,but to protect their improvised grid. No idea why it made it into the german news, but it did:https://www.tagesschau.de/schlusslicht/uhrenchaos-belgien-101.html Basically the power company is working on their main systems...
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    Statistics: Possible results when harvesting cells

    As promised, here is my thread where I will post the results of my harvesting. Every so and so often the question comes up what is to be expected when reclaiming cells from old laptop batteries. The answer is always the same, it depends and if you are unlucky you will get hardly anything useful...
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    Differences between discharging/testing devices

    Alright, I've been thinking about this for some days now. But before I dive into this completely I wanted to ask around. Can't imagine I'm the first one thinking about it. Have you come across someone who tested various devices against each other (and maybe the same device several times) for...
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    EU/Germany: 3x SkyRC IMAX B6 Mini

    My first batch of cells was processed with these. Close to7x24 operation was a bit stressful for the rubbish fans inside these units, they got completely wrecked. The fans that is, not the charger :)I've taken the fansout and used an external fan to cool the chargers. Apart from that they work...
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    Cell Database: Maximum discharge current / Saving datasheets to own storage

    Two separate things regarding the Cell Database I want to put up for discussion: 1. Today I've realized that there is some confusion going on regarding the discharge current of a cell. Two entries in the Cell Database were shown to me as examples of cells with supposedly very low discharge...
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    Fake 18650 Cells, Anything with 'fire' in it will probably result in one.

    I felt the need to add something to the latest video for beginners. I didn't want to post it on Youtube so I'd rather do it here where people might actually read it :) I love the "Fire" joke by the way, that one never gets old. For quite some time we even have cheap knockoffs of Trustfire...
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    Hello there!

    Greetings to all of you powerwall people! My name is Chris, I'm from Germany and just joined this nice community to share my, pretty small, powerwall project I've just dubbed the Powerboard. Before posting my introduction here I have prepared a little project thread so you have something to...
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    My little ~2 kWh Powerboard

    -------------------------------------------- Intro / tl;dr Powerboard is the name I just came up with, basically a second ago for the sake of being able to name it something other than mini powerwall (what it will be really). It will literally bea wooden board sitting there in the corner of my...
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