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| Pictured Inverter is the Xantrex PROsine 2.0, 2000 inverter / charger true sine wave inverter with a built in transfer switch. A phone cord used as an interface cable can be used to create a 240-volt AC output using two PROsine inverters. The unit as well comes with an external display to control the unit. The PROsine inverter is can charge your battery bank from a generator or from grid power. So as a backup only system solar module are not required. Could be a great way to get your system setup at a lower cost and add solar power at a later date. |
| Taking a look at the DC input end of the PROsine inverter. You will need to incase the wiring to stay within the NEC and International Builders codes. Xantrex provides the conduit box as an option. Use large cables capable of handling the high current of low voltage inverters. For the PROsine 2.0 you should use 4/0 size cables and a 250-amp breaker. This is because this unit uses a 12-volt power source. Doing the math 2000 divided by 12 = 166 amps draw.But you have to use the shutdown voltage of 10.5 volts because that will be the lowest |
| voltage and highest amperage put on the inverter. So 2000 divided by 10.5 = 190 amps. Plus 125% for the national electric code is 238 amps. The next size up is a 250-amp breaker. So you can see how this could change if you were running 24 volts or 48 volts DC current. You might save a little on smaller wires but the inverter normally cost more and the 175-amp breaker and box cost the same as the 250-amp breaker and box. Toss a coin in the air on that part. However if you were stuck with some long wire runs you would be better off going 48 volts. |
| The AC end of the PROsine inverter is almost as simple as the DC end. I did not open this end of the unit because there are only 4 wires and a couple of ground wire hookups. There are 4 screws holding the cover on the unit. Inside you will find two wires for output to the AC power breaker box sub panel. As always the Black wire is the hot wire and the white wire is the neutral. The other two wires are for the AC input from either a generator or from household AC power one black and one white wire. |
| The AC input wires are attached to the inverter internal transfer switch. When wired correctly you can power your home from grid. The second the grid goes off line the transfer switch will auto switch to the inverter and solar backup power. By turning off the main breaker from the grid the PROsine inverter will think the grid is down. This allows you to run from solar power only allowing you to save money on your energy bill. The flexible conduit shown above attached to the top knockout on the prosine inverter is being used to output AC power to the AC breaker panel. The knockout you see below the flex conduit is for attaching a pigtail cord to allow you to plug the PROsine unit into a generator or hard wire it to another AC power source. |
| The inverter equipment ground don’t have to be hooked directly to the main breaker box ground bar. But in this case it was handy, easy and just looks good to run it through a cord connector into the box. Each end of the #6 cable is marked with green tape to show it is a ground wire. Always use an equipment ground, remember it is not just your life at risk. It could be anyone that might touch the inverter case. |
| Xantrex provides a setscrew to connect the grounding to the inverter. I think it would have been a lot nicer if they had placed this ground somewhere the wire could be hidden better. Like inside the inverter conduit box that it touches the edge of it. |
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05-26-08