Hedges
I See Electromagnetic Fields!
- Joined
- Mar 28, 2020
- Messages
- 20,059
<I put a 48VDC fan in the attic and have a couple 12V panels in series feeding that, so afternoon sun vents the attic. Also used to power fans on my older passively cooled inverters.>
About $50 at Weird Stuff Warehouse (RIP).
Some Pabst fans for $12 at HalTed Specialties (RIP).
The trick is finding one that works with slowly waking up PV. Some will shutdown until the next power cycle.
I hung the 48V fan which had been from top of a rack in a gable vent, put Pabst box fans lying on top of SWR2500U heatsinks (but they didn't like rain exposure.) Couple spare panels in the yard, and I get variable cooling in proportion to sunshine. No timer or thermostat required.
What did that rig run you? Rather than burning up one of my rack positions, I think I’d rather just accept the 25% efficiency loss and power with AC (or pick up one if those fan/vents with an integrated panel).
About $50 at Weird Stuff Warehouse (RIP).
Some Pabst fans for $12 at HalTed Specialties (RIP).
The trick is finding one that works with slowly waking up PV. Some will shutdown until the next power cycle.
I hung the 48V fan which had been from top of a rack in a gable vent, put Pabst box fans lying on top of SWR2500U heatsinks (but they didn't like rain exposure.) Couple spare panels in the yard, and I get variable cooling in proportion to sunshine. No timer or thermostat required.