Friday, February 26, 2010

Prosine Inverter

My latest modification to Taj was all about making us more self sufficient while out there on the road. We have always had a coach battery with 75 Amp Hours of total storage which had been fine without the use of an inverter. Now we had our thoughts toward being able to use our microwave and small convection oven without being plugged into shore power. The oven uses 1850 watts peak so we needed to locate an inverter with a higher output than this. After doing a lot of research online, I was pretty set on getting a Xantrex Prosine or something very similar. The Prosine is a pure sine wave inverter which produces AC that works with electronic equipment that may otherwise have issues with the typical modified sine wave systems. This inverter also has a 3 stage charger that is a substantial improvement over the charger that comes factory in the RT.

The pictures above are of the system I bought off of Craigslist. It is a Prosine 2.5 which is a 2500 watt system. I paid $350 after testing it which is a pretty significant deal. At the time, the average new price was about $2000.

You can see from the picture, that we also decided to increase the size and capacity of our battery bank to 210 AH. Visible are 2 12V 105 AH AGM batteries from Full River. These are located in mounted boxes under the bed on the passenger side. They are connected with 2/0 welding cable which also is used to connect to the inverter through a 300 amp circuit breaker also visible. In these pictures, the box covers are not yet in place and the cables have not yet been secured out of the way.

At right is the fuse/circuit breaker box after removing the converter/charger which occupied the space below.

This picture shows the old
converter charger as removed. I took the guts out and put the housing back in place to allow the original cover to be re-attached.

A view with the empty housing now back in place. Maybe at some point in the future, I will have a good use for that little empty area!

The next picture shows the inverter in place cables attached but as mentioned earlier, they will be routed out of the way and secured. I intend also on shielding the circuit breaker and the positive post on the inverter better.

This last picture is the control panel with the inverter shown in standby and the charger just finishing it's job.

We gave up a little bit of storage space to improve our boondocking abilities and also to save LP by using the oven and microwave more often instead of the stove. I think it will be a good trade off. We still will find a way to carry everything we need and want with us.

Final note: I was a little concerned that this particular blog entry is not very entertaining. Heidi explained that with electrical, the best I could hope for was "informative"! Well, I hope I accomplished that goal at least.


  1. Nicely done Mike. I like that you now have a hidey-hole for your gold bullion as well. And to be able to heat up your circus peanuts any where, any time...heaven!
    I am entertained and informed...I have in the bus, what you had to start with and the annoying hum is reason enough to change to what you did...
    Good work! Now get out on the road...;^)

  2. That space would make a nice hiding place for stuff, but accessing it would be a hassle! I am saving it for something that needs "mounting". The cork floor is going to make it a pain to get the cover off. since only the top half is hinged.

    Heating up circus peanuts would be criminal and quite messy! However, nuking leftover liver sounds pretty handy!!

    Glad you were entertained :) Thanks for the comment Bri!


  3. I already read the good news on the yahoo board, but it's nice to see a few pics. I love the techie panel with the lights. Major find, indeed! My problem is that I want a 1000 watt inverter with a 50amp charger. The Xantrex Freedom is the perfect combo for me and it's going to be about 500-600.

  4. You know, I see them every now and then on the Seattle CL. I still search for deals for a few friends of mine almost daily. If I see another one, I will let you know :) Thanks for the comment!


  5. Not entertaining? I thought it was facinating, but then I guess I'm a techie- 200 odd amps from 12 volt batteries, thats interesting numbers

  6. Since I am learning all I can in hopes of ONE DAY getting out on the road with my wife in a class B I loved reading about your electrical set up. Desiging the basic interior is one area that I am not going to have too much trouble, BUT adding power into the design will not be a strong area for me.


  7. Entertainment? Blah! What I wants is info! I wants to know how to build my precious! And you've helped.

    Thanks! Nice post.

  8. Great info and pics! Thanks for taking the time to make this page.

    Dave F

  9. What might you do if you wanted to keep the original converter set up too, so you can plug into shore power? Can you have both and still wire it up to the current installed outlets?

  10. Anon, If you buy an inverter/charger, you can still plug into shore power as the charger replaces the converter function and has a built in transfer switch so the inverter can power the same outlets when the shore power is disconnected. If you don't have a charger/inverter, you can use the inverter in a similar manner if you wire in an automatic transfer switch or manual switches and are careful when switching sources. You can have specific outlets on the inverter that aren't tied into shore power too but it is a hassle. The inverter/charger is my preference of course. Easiest/cleanest install and operation.