Mean Well RSP-500-15 Switching Power Supply
IT just arrived. Initial impressions: Much heavier than the cheapowatt 1/2" wider, 1/2 inch longer and almost 1/2 inch less High than cheapowatt. The casing is about 50 to 75% thicker aluminum t...
Forum Discussion
I do believe the voltage drop is a bit excessive. It seems since it still remains at 0.2v even when the battery is accepting under 5 amps is more indicative of inaccuracy of the IPNV.
I've always been suspicious of its single decimal point reading. I find that my DMM directly on the battery terminals reads higher than the IPNVat most voltages where the opposite is expected.
I nearly cut a 60MM fan hole directly on fan lid directly over internal CB finned heatsinkyesterdat when i cut the 80MM hole, but decided to test it with just the 80MM fan, and it did not really do any better compared to just having the 80MM fan hanging against openings ny terminals. The 40mm fan shut off at 25.03 amps vs 23.97a.
I also placed/hung the 60mm Noctua fan blowing into interior at 24 minutes into test.
I believe the MW provided NMB fan is actually more powerful than the 9500 rpm 0.12a 11.3cfm rating of that link. Mine has a BA designation, and claims 0.18 amps on it. it is rather surprising how little air the Noctua 80MM fan exhausted when the 40Mm fan fired up. I've got to think that the internal finned heatsink is directly in front of the biggest front opening in the casing, and must be getting a good amount of air velocity across it as is.
I'm not keen on running it without the lid. The 40MM fan would move very little air over the internals with the lid removed. With lid in place the air drawn by the fan to be exhausted has to run over the internals. When it does fire up its loud and a narrow dense column of air expelled is quite warm to the feel. I think even with a different fan blowing air at the open casing, there will be some airflow shadowed areas that would get a lot hotter than they would with case on and 40M fan running.
Theses muffin fans vary widely how they move the air. usually there are 4 hotspots of flow that do not exit perpendicularly from the fans face, but at a much wider angle. When resistance is presented behind the impeller, the angles get even wider. So just aiming a fan in the general diretion does not cut it.
The fans with the angled steering vanes in front of the Blades, like Vantec tornado models, some Delta fans, and the SS AP 182, these keep the airflow focused and very aimable. I use 2 Vantec fans for internal air circulation, a 92mm and an 80mm, both on voltage/speed controllers.
I simply have to make use of those purdy heat sinks you mailed me Westend. Getting them mounted to the cases recesses will take some doing as there are screwholes which are tapered so a perfect mating of heatsink base with case exterior is not ideal. The Arctic silver thermal adhesive is going to have to fill in some voids. Better than air, but obviously not as good as direct contact across entire base/case. Last nights test, I just rested two heatsinks on the port side and they were warm to the touch( and read 84f before I added more external airflow) despite minimal surface area in direct contact between heatsink base and case exterior.
The expected lifespan is quite impressive. Since my depleted batteries are sucking an additional 90 watts over the 500 watt rating of the unit for 45 minutes or so, I feel anything I can do to help dissipate the extra heat can only be beneficial for longevity. I think external heatsinks adjacent to the transistors will keep the case internals much lower. The metric will continue to be at what amp level the 40MM fan shuts off. Without my additional fans it was ~6 amps. with the 80mm fan aimed at the openings at was 23.97a, with the 80MM fan mounted to lid and exhausting it was 25.03a.
I think with a Noctua60Mm pushing into case lid and the Noctua 80MM pulling, I can achieve improved numbers, and the little 40MM turbo fan only comes on for those 45 minutes during bulk charging, that is fine too. I've already achieved my noise goal. On overnight float voltage/power supply duty, the loud 40MM fan will never turn on with my expected loads. But improvements can still be sought which might or might not increase longevity of the unit, but anyway, I am impressed with the PSU. The 127$ delivered price tag was well worth it to me.
The ability to choose any ABSV and let the unit do 40 amps CC for a period of time?.................. priceless.
I've always been suspicious of its single decimal point reading. I find that my DMM directly on the battery terminals reads higher than the IPNVat most voltages where the opposite is expected.
I nearly cut a 60MM fan hole directly on fan lid directly over internal CB finned heatsinkyesterdat when i cut the 80MM hole, but decided to test it with just the 80MM fan, and it did not really do any better compared to just having the 80MM fan hanging against openings ny terminals. The 40mm fan shut off at 25.03 amps vs 23.97a.
I also placed/hung the 60mm Noctua fan blowing into interior at 24 minutes into test.
I believe the MW provided NMB fan is actually more powerful than the 9500 rpm 0.12a 11.3cfm rating of that link. Mine has a BA designation, and claims 0.18 amps on it. it is rather surprising how little air the Noctua 80MM fan exhausted when the 40Mm fan fired up. I've got to think that the internal finned heatsink is directly in front of the biggest front opening in the casing, and must be getting a good amount of air velocity across it as is.
I'm not keen on running it without the lid. The 40MM fan would move very little air over the internals with the lid removed. With lid in place the air drawn by the fan to be exhausted has to run over the internals. When it does fire up its loud and a narrow dense column of air expelled is quite warm to the feel. I think even with a different fan blowing air at the open casing, there will be some airflow shadowed areas that would get a lot hotter than they would with case on and 40M fan running.
Theses muffin fans vary widely how they move the air. usually there are 4 hotspots of flow that do not exit perpendicularly from the fans face, but at a much wider angle. When resistance is presented behind the impeller, the angles get even wider. So just aiming a fan in the general diretion does not cut it.
The fans with the angled steering vanes in front of the Blades, like Vantec tornado models, some Delta fans, and the SS AP 182, these keep the airflow focused and very aimable. I use 2 Vantec fans for internal air circulation, a 92mm and an 80mm, both on voltage/speed controllers.
I simply have to make use of those purdy heat sinks you mailed me Westend. Getting them mounted to the cases recesses will take some doing as there are screwholes which are tapered so a perfect mating of heatsink base with case exterior is not ideal. The Arctic silver thermal adhesive is going to have to fill in some voids. Better than air, but obviously not as good as direct contact across entire base/case. Last nights test, I just rested two heatsinks on the port side and they were warm to the touch( and read 84f before I added more external airflow) despite minimal surface area in direct contact between heatsink base and case exterior.
The expected lifespan is quite impressive. Since my depleted batteries are sucking an additional 90 watts over the 500 watt rating of the unit for 45 minutes or so, I feel anything I can do to help dissipate the extra heat can only be beneficial for longevity. I think external heatsinks adjacent to the transistors will keep the case internals much lower. The metric will continue to be at what amp level the 40MM fan shuts off. Without my additional fans it was ~6 amps. with the 80mm fan aimed at the openings at was 23.97a, with the 80MM fan mounted to lid and exhausting it was 25.03a.
I think with a Noctua60Mm pushing into case lid and the Noctua 80MM pulling, I can achieve improved numbers, and the little 40MM turbo fan only comes on for those 45 minutes during bulk charging, that is fine too. I've already achieved my noise goal. On overnight float voltage/power supply duty, the loud 40MM fan will never turn on with my expected loads. But improvements can still be sought which might or might not increase longevity of the unit, but anyway, I am impressed with the PSU. The 127$ delivered price tag was well worth it to me.
The ability to choose any ABSV and let the unit do 40 amps CC for a period of time?.................. priceless.
