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Post by papaof2 on Oct 17, 2023 22:28:02 GMT -6
30kw trailer mounted diesel gen. $7900 but you need to contact the vendor about shipping costs. www.aliexpress.us/item/3256802789360266.htmlIt's three phase, so maybe add metering to two of the phases and sell that power to your neighbors during power outages? Maybe a $20 connection fee (providing something for their extension cords to plug into) + $0.20 - $0.30/kwh? Possibly payable in advance (minimum $100 deposit?). |
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Post by feralferret on Oct 20, 2023 0:13:55 GMT -6
30kw trailer mounted diesel gen. $7900 but you need to contact the vendor about shipping costs. www.aliexpress.us/item/3256802789360266.htmlIt's three phase, so maybe add metering to two of the phases and sell that power to your neighbors during power outages? Maybe a $20 connection fee (providing something for their extension cords to plug into) + $0.20 - $0.30/kwh? Possibly payable in advance (minimum $100 deposit?). That's not how three phase works. There are three legs as opposed to two legs with single phase. It takes two legs to get 240 volts. Two legs are what comes from the power company to your house and what your breaker box is configured to use. The breakers in a vertical column alternate legs from one breaker to the next. That is why a 240 V feed uses two adjacent (vertically) breakers. The engine that they use would be a critical factor. That has been known to be a problem with some of the stuff an AliExpress. You could in theory do ONE drop with the third leg and a neutral return for a 120 volt feed for a neighbor. |
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Post by papaof2 on Oct 20, 2023 2:28:34 GMT -6
Wondered how long that answer would take ;-) Some forums don't have anyone with that level of electrical knowledge.
Practically, you could power a small neighborhood with 30kw but you'd need to build you own mini-substation to be able to feed a number of houses with separate monitoring and measurement. However, there are enough Hall effect devices to be able to build your substation in another small trailer and monitor them remotely by wifi or bluetooth.
There are a lot of cheap engines coming out of China so you have no idea what you are getting unless you know someone who has the same model. Lots of cheap electronics also - which is why I've done informal reviews on some of the things I've purchased. Unless an owner tells others, there's no way for anyone to know. The "USB-C" thumb drive I posted about has exactly ONE review and it had 5 stars. Obviously not someone who had tried to use the device with a standard USB-C phone or tablet - but the review had a picture of the drive in place on a device. And I could not post a review - surprise, surprise...
Unless I have experience with a China-made brand, I'll be in "Divide the amps, watts, lumens or other specs by 2 or more" mode. The WZRELB inverters (they are the unmarked inverters sold by reliablepower on ebay several years ago for about $200 for 2000 watts) are something I have positive experience with. They deliver a very good sine wave, they produce the rated power and I've had one in place for backup power for 5 years. At this point, I simply expect it to work. Not pretty, not the smallest package at that power (it's about 5 times the size of the Changi "4000 watt inverter"), but it works reliably. I did connect and load the spare reliablepower inverter to test it but that's the only time it's been out of the box - that's probably as good a recommendation as anyone could give.
The "4000 watt" Changi CJ-4000Q pure sine wave inverter Banggood sold for $115.18 including delivery in 2021 actually has a decent output waveform but it's maximum power is about 1500 watts (in a 61F environment - need to de-rate that in a warmer space because it shut down at 1650 watts in 61F space). However, if you put a piece of blue tape over the "4000" on the case and write in "1250" you won't be disappointed - that is all the power I expected at that price - in this case, that's "divide by 4000/1250" or 3.2.
There was a big (80kw or so) gen that was on Craig's List maybe a year ago. If you had space for that, you could have gotten a split 6000/2000 gallon fuel tank a few months later. Between the two offers, you would have had very good backup and the opportunity to be the new neighborhood power company ;-)
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