Voidisyinyang Voidisyinyang - you are finding exactly what I found, the 12v lead acid battery doesn't absorb very much power (~30-40 watts). Lead acid batteries aren't very efficient with power storage anyway, at about 85% efficiency. That said, I only use lead acid batteries as a buffer and charge/power other devices. Check out my other videos where I power a 32" and 55" smart TVs. During my workouts, I typically charge my laptop using an automotive charger https://amzn.to/2Tpgnt4 which creates about 65 or so watts resistance, along other automotive chargers https://amzn.to/2x2xZC2 to charge a USB-C power pack (13w) an iPad (12w) and a fan (6w) https://amzn.to/2TPFEvx - if I need more resistance, I charge a Lipo battery using this charger iSDT https://amzn.to/2PO00E1 What I like about the iSDT charger is I can change the resistance (amps) mid ride without stopping and starting again, and with the giant 11.1v 177Wh Lipo I just picked up, I can crank the resistance over 150 watts! I then use the charged Lipo to finish charging my iPad, iPhone and portable battery packs. So, in a nutshell - don't bother using lead acid batteries for storage, get your resistance elsewhere with automotive chargers or Lipo chargers. Hope it helps!Pedal Generator Charging Various Batteries - vid
OK this answers my question! Or addresses it - so with that AC/DC converter - for 100 watts. So I get .83 amps. So the resistance is 120/.83 if I'm correct - so that's 144 Ohms. So I expected you to be pedaling a lot slower due to the resistance. But it seems you are pedaling faster to try to get your volts higher to then increase your amp output to power the t.v. But since it's only .83 amps - it appears that it is really the conversion to the higher volts that is the main reason you need to pedal so much faster.... Now I'm going to look for your lithium battery vid. thankspowering tvs using a DC/AC inverter - vid
OK I think I follow you now - I'm still fascinated by your 100 watt AC tv experiment - because that should have an ohms of 144 for the AC conversion - but it's only .83 amps? So how come the 144 Ohms resistance doesn't mean you need to pedal slower? Or how do you think - the inversion resistance is still DC? So it's 100/12 = 8 something amps so ohms is 12/8 - so not even 2 ohms. So the resistance must still be DC ohms? Maybe that's why you are pedaling so fast and having trouble getting up to 100 watts. What do you think? thanks.So based on that assumption - I get .8 ohms via DC power for the DVD player at 180 watts and 1.5 amps. So that's why I can't increase my amps high enough against the watt use draw! Fascinating. I mean I can while just watching the DVD player but not if I have another charger attached.
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Ok thank you so much for your response confirming that indeed it is the resistance level of the draw that limits the amp output on the treadmill motor. So first of all - that automotive charger has a 4.5 amp output - so you're saying you put that into your lithium battery to increase the load draw? I actually use a 31 Amp-hour lithium battery converter (the Chafon 346 watt-hour). So I also had been wondering about this - because when I powered a 1.5 amp DVD player along with a 50 watt battery charger (for an 18 volt drill) - so I think then the bicycle resistance did go down - but I was only meeting the charging amps as the same level as the draw amp use (so the drill charger draws 1.8 amps). OK I will try that AGAIN and try pedaling faster-harder to increase the amp draw. The thing is that I like to watch movies - instead of trying to power a Toaster at 700 watts - like that German cyclist - have you seen that vid?
OK I just tried powering the DVD player directly through the DC-DC buck converter using an AC-DC inverter and then inverting that back to DC for the DVD player. OK - I got no draw. I was hoping the draw would be more - since I'm at 80% on the Chafon lithum battery inverter. So I don't think I can charge as fast - the resistance has lowered too much on the Chafon. Maybe with the DVD player plugged in - it draws it down enough. But it's just about even - at the 80%. So anyway now I discovered that this inverter just doesn't work at all. It was a discontinued item. One hardware store had it priced at $22 and another had it priced at $7. haha. So I guess I gotta drive to Harbor Freight to get the same inverter I had before - only I blew that previous inverter by wiring into it the wrong way. oops. Yes I was trying to answer this same question - about how the resistance changes by inverting to AC power. So if you have any comments on that - I'd appreciate it. thanks.
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