The Problem Index → Water
I need to move water and there's no electricity out there
If you have falling water, the answer is almost certainly a ram pump, and it has been the answer since 1796. If you don't, it's solar. Everything else is a compromise between those two.
What actually works
◆ Proven
The hydraulic ram pump
Two moving parts, no power, runs 24 hours a day for decades. Lifts 10–25× the drive head and needs no attention beyond an $8 'is it thumping' sensor.
$150–200 in parts◆ Proven
Solar submersible pump
$150–1,200. The right answer when there's no fall to work with. Pump to a tank in daylight and gravity-feed from there — a tank is a cheaper battery than a battery.
Run the numbers
- Ram pump output → — free calculator, works offline.
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