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Old 07-13-2017, 05:24 AM   #1
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Default Advanced RV using battery system from Volta

https://rv-pro.com/news/volta-power-...A2MDg3MzU3NAS2
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Old 07-13-2017, 08:13 AM   #2
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Just wonder which one would be less expensive; the Volta System versus a towable $30K Nissan Leaf with an inverter, a generator, wires, 30kWh oomph, and a gratis small car
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Old 07-13-2017, 12:06 PM   #3
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.

This is exciting news.

I like innovations,
especially those that are driven by people with knowledge and passion.
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Old 07-13-2017, 01:52 PM   #4
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No info on which of the Volta system components will be used but Volta uses 48v for the battery bank, inverter, alternator, and they use a DC-DC converter to get 12v.
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Old 07-13-2017, 01:59 PM   #5
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Originally Posted by gregmchugh View Post
No info on which of the Volta system components will be used but Volta uses 48v for the battery bank, inverter, alternator, and they use a DC-DC converter to get 12v.
This is almost exactly the type of system that we have discussed here several times as being the more practical in a big battery capacity RV. High(er) voltage charging, inverter, and batteries, and run the leftover 12v stuff on a DC to DC converter.

Smaller wires, less weight, less heat generated, probably more efficient alternator, and still under the 50 volt threshold that is often put on safety.
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Old 07-13-2017, 02:41 PM   #6
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Quote:
Originally Posted by booster View Post
This is almost exactly the type of system that we have discussed here several times as being the more practical in a big battery capacity RV. High(er) voltage charging, inverter, and batteries, and run the leftover 12v stuff on a DC to DC converter.

Smaller wires, less weight, less heat generated, probably more efficient alternator, and still under the 50 volt threshold that is often put on safety.
Look at the specs on the Volta 48v alternator...
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Old 07-13-2017, 02:53 PM   #7
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Look at the specs on the Volta 48v alternator...
I can't get anything Volta to open, just spins. Got a link?

Finally opened. 48v, 190 amps. They appear to really spin it, though, with a turn on speed of 2700 shaft rpm. To get turned on at idle of 600 rpm, you would be looking at between 15 and 20K rpm at highway speeds. Not an issue as long as it can handle it, and it will move a lot of air at those speeds or cooling. 35# is believable as the current will be low so small and easier to cool windings.

It would be capable of something like 3X the output of even the Delco alternator, and those are said to consume about 7hp (like an Onan of similar size), so unless the Volta is very, very, much more efficient, it is going to take a lot of hp, perhaps close to 20hp at full load. On a small engine like a Sprinter has, one would have to start being concerned over wear and tear on the drive system for it, if they are off the front of the engine. I assume it will be on a separate drive than the other parts, but you are looking at some pretty big side loads on the front main bearing of the engine. The bigger diesels that they have been doing for folks like Prevost are much more designed to handle big accessory drives. It would also slow down the van climbing steep hills as that definitely a "feelable" amount of power loss in smaller engines.
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Old 07-13-2017, 03:20 PM   #8
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Liberty Coach started using that system last year. Maybe there is more info on their site.
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Old 07-13-2017, 04:23 PM   #9
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Default Advanced RV using battery system from Volta

Quote:
Originally Posted by gregmchugh View Post
No info on which of the Volta system components will be used but Volta uses 48v for the battery bank, inverter, alternator, and they use a DC-DC converter to get 12v.

... and it has been reported that the new generation Sprinters will likely have a 48V start-stop mild hybrid system.

- - Mike
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Old 07-13-2017, 07:03 PM   #10
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If they are using LTO cells, they are quite expensive. They were available at the vender when I built my pack but were over 4x the cost. The temp parameters of the cells where much higher than prismatic cells. -5F to 131F which would accommodate exterior mounting.
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