TronxII

Well indeed, it seems possible to fly that high with propellers. the Helios Prototype piloted remotely by Greg Kendall reached an altitude of 96,863 feet (29,524 m),

Could any of the aeronautical experts explain how this thing flies at 65 000 feet? Solar powered jets? I thought there is little air up there for propeller planes to fly. big H2 balloons under the wings?

The chinese girl has a power supply. But it seems that the controller box of the pump should be directly connected to the solar panels and handles switching on. Thanks all for instructing me.

Flyingtiger's video suggests these pumps need a separate controller. Bandersnatch, are your pumps also in this voltage range of 110 - 180V DC? To what power do you connect these directly to the panels via some controller?

Solar pumps 110V or the bigger one 185V DC, 17A, This is nice power and the pump will probably work much better than any other "solar toy pump". But my question is, how do they use them? I would struggle to find a nice way to connect them to ... what? A 180V battery? How to charge this? An array of solar panels with 30 A output and no battery? And then switch them on manually when the sun shines? - imagine the spark at the DC switch Maybe the Thai are more clever and have a simple solution, but for me I would struggle to make these work. Apparently they sell them, so there might be a market. Can anyone enlighten me please.

Most likely because they have been repeatedly discharged to 0% and then charged to 100% again, which damages them irreversibly. I have Lenovo Laptops with 17 years old batteries which still hold charge for 20min to half hour. But there, you can set discharging and charging thresholds.

Also, is it really needed in locations near the Equator?

Did you already get your quality LiFePo4 from China ? I remember you wanted to order some in November or December.

How do you guys handle the initial rain water collection? I suppose you have a metal roof. So the first rain, takes all the bird <deleted> and dust away. How do you switch to fill the "clean" water in your big bottles ?Or do you have a filter?

This one does the job for me. 12V 2 to 3A current draw, less than 500Baht I wish we could buy them in Europe.

There is no issue, it's all "end of the world is near" propaganda. If Lithium was as rare as gold, we would still have thousands of tons available per year, as we do with gold. 35 000 tons Li are extracted every year. We will not have a shortage of this by tomorrow, neither will we have a shortage of gold and silver which are much less abundant. Tobacco ash contains 0.5% Lithium. But I was wrong, it is only the 25th element by abundance.

Sounds promising. Seems like the Chinese improved the already poor quality of the british MG manufacturing even further.

Well, if they always fail open then this is fine. Trusting these mechanical devices from China for a battery which can deliver 1kA , well ... yeah.... For me, a sand filled fuse very close to the battery is a must, so I recommend it to the newbies.

Most of this stuff is not anymore what it was 30 years ago. Especially what you can buy in Thailand, is all from China with different quality, mostly in the lower range. Once I lived in the UK, and the house had a power cut from time to time. Usually the main breaker would switch off. Probably we drew too much power. But it also happened when nearly nothing was on. On one occasion, we had the power cut again, but the main breaker was on. Electricity company came, measured, no power. Next day, they started to dig a hole in the street, took them a day, they didn't find anything. In the end, the electricity guy switched the main breaker off and on again, and instantly the power came back. We looked at each other like idiots. Neither me nor them have tried to switch the main breaker off, because it was on. That breaker was not a RCD. Since then, I do not trust these breakers very much. I don't have a picture of the breaker, but I documented the emergency measures, and I was very proud in these days to provide 230V out of the car battery with a UPS.

There must be a fuse. These circuit breakers cannot be trusted. For the DC fuse it is important to be filled with sand to extinguish the arc. The linked datasheet does not mention the sand, but to break 50k A as they claim, there should be sand inside.