I have begun to plan a solar water heater for the spa/hot tub that came with the house I've recently acquired.
I am thinking of trying to use a pump that is powered by a 12v/24v DC brushless motor with the following specs:
- Power: DC12~24V
- Current: 3.5A@24V, 1.6A@12V
- Output: 40.0L/m (635 GPH) @24V or 380GPH @ 12V
- Pressure: 9.3psi @24V
- Motor: DC 3 phase coil, more torque and quiet
- Power: 84Watt/ 19.2Watt
- Speed control(3 wires): 0-5V analog
- Intake: G1/2 (1/2")
- Outlet: G1/2 (1/2")
- Vertical lift: 6.5m (21ft)
- Life span: > 20,000hrs @ 1600rpm~10,00rpm
- Noise: << 38dB
- Working Temp: 100'C/ 212'F (non-submersed)
- Envir Temp: <50'C
- Size(L*W*D): See "More images for the exact dimension"
- Weight (net): 21.0oz
The amps - wattages for the 12/24v applications seem a bit screwey.
I'm wondering if they might have mixed up the amperage requirements, if 3.5A@24V & 1.6A@12V might more accurately be 1.6A@24V & 3.5A@12V.
Then, the wattage requirements would change from 84Watts @ 24v & 19.2Watts @ 12v to 42 watts @ 24v and 38 watts @ 12v.
Those numbers seem to be a bit more reasonable to me.
But then, my electrical knowledge is skimpy to say the least.
Anyone out there with enough knowledge to confirm or deny my feeling about this?