My new van buildout thread
I figure I will have a lot of questions so I should put them all in one thread :). I got a new van! Well, an old one, but new to me. It's in another state, and I won't see it in person for a few m...
Forum Discussion
I have a masterflow MV-50 12v aircompressor, which draws 200 watts or so.
https://www.amazon.com/dp/B000L9AD2U/ref=pd_lpo_sbs_dp_ss_2/154-8797292-3188141?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=lpo-top-stripe-1&pf_rd_r=MCC54EAAEC6S86R9PMCF&pf_rd_t=201&pf_rd_p=1944687642&pf_rd_i=B000BM8RT8
I deflated my bags completely. I put my watt meter inline on the Mv-50's power cord.
Attached mv-50 to schrader fill valve.
Turned on.
Voltage dropped from 12.42v unloaded to 10.28v at ~ 19 amps.
51.25 seconds later the airbag reached 100PSI.
I filled other airbag, forgot to turn on stopwatch
I returned to first airbag, which was now ~75PSI and filled it back upto 100PSI, returned to other airbag, found it at 85PSI and returned it to 100PSI. One bag filling takes weight off the other airbag reducing its internal pressure which is why they PSi lowers when filling the other bag. Some escapes attaching the tire chuck too.
Watt meter claims I used 0.856AH, 9.0Wh to fill both bags to 100PSI, but it does not factor in peukert and its accuracy is not overwhelming, despite the 3 place decimal.
The masterflow compressor is rated at 150 PSI. I have modified it with better airlines and a locking tire chuck, and improved heat dissipation, but these modifications likely do not affect its speed much.
51 seconds is nearly twice what my estimate to 100PSI would have been, so hats off to real data and tools for measurement.
I can, and do, plug this compressor into a better shorter thicker circuit for doing tires, but where it is is basically for pressurizing my water tank to prime my water pump, and for the airbags, and while the 2.2 volt drop on the 12AWG from fuse block is more than desirable, it is not worthy of me running thicker cabling. I can just unplug compressor from here and move it to reach thicker copper via 45 amp anderson powerpole connectors on 8awg, as I have 45 amp anderson powerpoles in many places on shorter circuits to battery.
I have run compressor directly off meanwell rsp-500-15 set at 14.5v, Runs much much faster. Sounds much different too.
The voltage drop I measured does not take into account the drop from powerpole to actual motor which is another 6 feet one way of 14AWg as provided, so improvements can be made on this circuit too for faster speeds.
I was never impressed with any 12v air compressor which came with a ciggy plug. Each one was slow, and burned itself up at the worst possible time.
https://www.amazon.com/dp/B000L9AD2U/ref=pd_lpo_sbs_dp_ss_2/154-8797292-3188141?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=lpo-top-stripe-1&pf_rd_r=MCC54EAAEC6S86R9PMCF&pf_rd_t=201&pf_rd_p=1944687642&pf_rd_i=B000BM8RT8
I deflated my bags completely. I put my watt meter inline on the Mv-50's power cord.
Attached mv-50 to schrader fill valve.
Turned on.
Voltage dropped from 12.42v unloaded to 10.28v at ~ 19 amps.
51.25 seconds later the airbag reached 100PSI.
I filled other airbag, forgot to turn on stopwatch
I returned to first airbag, which was now ~75PSI and filled it back upto 100PSI, returned to other airbag, found it at 85PSI and returned it to 100PSI. One bag filling takes weight off the other airbag reducing its internal pressure which is why they PSi lowers when filling the other bag. Some escapes attaching the tire chuck too.
Watt meter claims I used 0.856AH, 9.0Wh to fill both bags to 100PSI, but it does not factor in peukert and its accuracy is not overwhelming, despite the 3 place decimal.
The masterflow compressor is rated at 150 PSI. I have modified it with better airlines and a locking tire chuck, and improved heat dissipation, but these modifications likely do not affect its speed much.
51 seconds is nearly twice what my estimate to 100PSI would have been, so hats off to real data and tools for measurement.
I can, and do, plug this compressor into a better shorter thicker circuit for doing tires, but where it is is basically for pressurizing my water tank to prime my water pump, and for the airbags, and while the 2.2 volt drop on the 12AWG from fuse block is more than desirable, it is not worthy of me running thicker cabling. I can just unplug compressor from here and move it to reach thicker copper via 45 amp anderson powerpole connectors on 8awg, as I have 45 amp anderson powerpoles in many places on shorter circuits to battery.
I have run compressor directly off meanwell rsp-500-15 set at 14.5v, Runs much much faster. Sounds much different too.
The voltage drop I measured does not take into account the drop from powerpole to actual motor which is another 6 feet one way of 14AWg as provided, so improvements can be made on this circuit too for faster speeds.
I was never impressed with any 12v air compressor which came with a ciggy plug. Each one was slow, and burned itself up at the worst possible time.
