The SURT5000XLT (593g3) and the SURTD5000XLT are incredibly similar. Two obvious things changed. The first is the newer "D" model replaced the serial port with a RJ45 type communication jack. Apparently, this has changed all sorts of comm protocols (which causes my eyes to glaze over). The second thing is that the unit is no longer a rack/tower combination. APC now makes the rack version a different part # (SURTD5000RMXLT3U) and $150 more.
However, 2 specs have changed. The first is Online Thermal Dissipation, which has increased from 1040 BTU/hr to 1150. (To be honest, I really dont what that exactly is). The second is the runtime. Though they both use the RBC44, one has a half load runtime of 15mins and the newer18mins.
So does that mean the new unit is more efficient and uses nano-piezelloic power to increase runtime OR did APC change the specs for the RBC44? It sounds like something we can test.... anyone want to bet on the nano-piezelloic power?
Since more people are asking for the D version, I guess I am going to make another part #. Look for the 593g4 to indicate the SURTD5000XLT.
