I just got 3 benchmark power supplies in the mail today. These are the ones you can buy from SPCracing.com. They are server PSU's converted or RC use. Let me just say... wow. This is a quality product.
I ordered 3. One for myself, one for a friend and one I dont really have a home for yet but shipping was good so I thought id just grab it anyway. You never know.
The two I ordered are both 12volt. One is 44.5 amps and the other is 47amps. I ordered both because the 44.5 amp unit is longer, but thinner than the 47amp unit. I have plans to build a sweet portable charging rig at some point so I wanted to make sure I had some options for power supply size.
Both chargers are converted the same. They are wrapped in shiny black shrink and look excellent. The lable has all the info youll need to know what the PSU is capable of.
The plug end is pretty non exciting. The 47amp does still have the handle attached. Which may be convenient for mounting or carrying... or it may not. Its not obtrusive IMO.
The business end of these units is the best part. The first and most obvious feature is the threaded binding posts. They accept 4mm bullet connectors which can be plugged in through the top of threaded cap, under teh bottom of the threaded cap... or, if you want to power 2 chargers, you can use both. Most converted PSU's simply have short wire leads with connectors on the end for plugging in your charger. Sometimes the 4mm bullets are soldered right to the power output tabs on the PSU. In this case, the binding posts are safer, look better and are more useful since they offer 2 plugs per post.
The next feature is a little hard to see. The little green wire loop on the back of the power output bar is actually a feature. Its the fan resistor wire. If you plug it in, the fan runs at low speed when nothing is connected and only moderate speed when the charger is running. These fan speeds are more than adequate to cool the PSU for RC use and the lower fan speed is much quieter. BUT... if your really concerned about cooling you can simply unplug the jumper and the fan will run at full speed, all the time. VERY cool feature ive never seen on any other converted PSU.
Finally, id like to point out that all the unused power connectors on the back of the PSU have been covered up with silicone or some other insulated medium. This is a great idea and a highly valuable safety feature. These connectors (originally used by whatever the PSU was powering) are not needed for RC use but are still live and can be shorted out if something gets dropped on them. Filling in this area will prevent this all together and gives the impression the builder actually knew what he was doing and had thought about the end user, not just getting the job done fast.
Overall, you cant beat this kind of power for the price. So there a great buy even without the nice build quality and attention to detail. But, add those extras in, and the value is just crazy. There are other models available also, some with even more power... but these ones were more than enough for the plans I have. With that said, I think Ill be switching from my current converted PSU to a benchmark unit strictly because of the additional attention to detail. Thats important to me.