Pond Aeration question

I want to use a brushless 24v DC pump (that says up to 60v is ok) for pond aeration (small pond, maybe 60' diameter, 8' deep). I'd like to simply connect a couple of 175w panels (30v) in parallel to the pump leads, and when the sun shines, let it pump. Anyone done this ? Question in my mind is would is would it harm the pump if the power output of the panels is near nothing at first and last light of the day ? I'd prefer to keep it simple, no batteries for buffer, no charge controller/etc....just panels to pump.
Have a SNAP (brand) DC fan in a greenhouse I connected this way....works fine. Cloud goes over, you can hear the fan RPM drop, or fade away to nothing as evening hits. Been running for several years now.
Comments
Linear Current Booster may be interesting (but not cheap):
https://www.solar-electric.com/sunpumps-solar-pump-controller-pca-60-bls-m2s.html
https://www.solar-electric.com/902-100.html
Basically, they act like a MPPT solar charge controller. The take the high voltage/low current from the solar array, and turn it into low voltage/higher current for the motor (DC motors need high current for high starting torque--voltage is less of an issue).
For pumps and compressors that have high starting torque requirements--The "high voltage/low current" from a solar array in the morning may not start a high torque requirement pump until the sun is way up in the sky (and/or you have to add more panels).
-Bill
|| Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
|| VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A
solar: http://tinyurl.com/LMR-Solar
gen: http://tinyurl.com/LMR-Lister ,
Tnndy
nice coop, yeah do it like your coop, keep it simple and no problems, even with sorta iffy batteries, you are using the sun to power, the battery only stabilizes the system. I have a few very small solar uses that have only a 12 watt panel, no controller, only a zener diode to prevent overcharging, and a minimum of battery for the task at hand.
Do you have a brand/model number and rework instructions that you have used to modify a buck mode switching power supply into a (roughly) constant/minimum input voltage (I think that is what you did)?
-Bill
|| Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
|| VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A
solar: http://tinyurl.com/LMR-Solar
gen: http://tinyurl.com/LMR-Lister ,