New Tesla Battery (PowerWall) - Page 3 - Fiberglass RV


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Old 05-04-2015, 06:48 PM   #29
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I believe that even the 7 kWh battery would require far more solar panels to recharge completely than one would want to carry with a FG trailer.
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Old 05-04-2015, 08:09 PM   #30
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I believe that even the 7 kWh battery would require far more solar panels to recharge completely than one would want to carry with a FG trailer.
It got my attention because I could use solar panels and a generator to store enough power to run the ac for a few hours at night when generators are not allowed. It's too expensive now but the day is coming.

What would it take to charge the 7 kWh? Would 750 watts of solar panels do it? (In summer)
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Old 05-04-2015, 09:10 PM   #31
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"... The planet will survive just fine as it has for a few billion years. I often think human ego suggests that we're in charge of the earth, I'm afraid it's not so. Nature can create chaos in a day.
Well said. Reminds me of an old comedy skit that I hadn't seen in years - George Carlin "Saving the Planet". It's on YouTube if anyone is curious. (WARNING: contains typical George Carlin vulgar language, so if you fear being offended, don't watch the video.)
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Old 05-05-2015, 12:17 AM   #32
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Here is what I think
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Old 05-05-2015, 07:26 AM   #33
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Not to change the subject, but if you are heating with oil or propane and cooling with electric, put Geo-thermal in now. For most locations, its a no brainer. I put it in two years ago and I have recouped 1/3 of its cost and the house is warmer and in the summer more comfortable. I am eying solar next. Sadly, I don't think many change for the environment, but for the economics. I am hopeful for Tesla. I believe it is going to be an independent who challenges the establishement.
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Old 05-05-2015, 09:14 AM   #34
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Steve,

Actually the environment is doing pretty well. I read an award winning book by a Yale professor on New England's environment covering the 1700-1800's.

New England was virtually clear cut for farmland and wood. Deer were virtually non existent. I never saw a wild turkey in NE until I was almost 50, now turkey, deer and moose are every where. We live in a beach community of 1/6th acre lots and have had moose in our neighborhood.

We used to live in a Geodesic dome, 50 feet in diameter. Once we intentionally tried to find it from a small plane, almost impossible. Trees every where and growing faster than ever with all the CO2 in the air.

The rivers and skies are both cleaner.

We have driven much of North America and are always amazed by how much unoccupied space there is, good thing because people are clammering to get here.
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Old 05-05-2015, 03:34 PM   #35
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Not to change the subject, but if you are heating with oil or propane and cooling with electric, put Geo-thermal in now. .
Yup, our Provincial government is offering homeowners grants for those who make the switch to Geothermal.

We have a small city close to me has put in their own Geo Thermal system running under the streets, about ten years ago and any new residential towers and business are required to tap into it.
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Old 05-05-2015, 04:21 PM   #36
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Carol, What city is that?
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Old 05-05-2015, 04:28 PM   #37
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The City of North Vancouver - its a small city located in the centre of the much larger District of North Vancouver (were I am). We are known to be just a tab green around here ;-)

The city has a webpage on the subject. Lonsdale Energy Corporation - City of North Vancouver
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Old 05-05-2015, 05:36 PM   #38
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I think all of you have missed the presentation. This device is basically for load shifting. Charge it when energy is cheap, use the power from it when energy is expensive. In many markets (but not all) the price of electricity varies by the time of day. That savings is how you get a payback on this device. The time periods are relatively short - so 4 or 5 hours use is all that is needed.

To equate this to batteries you'd put in your RV, it's around 800 amp hours. That would be quite expensive in Lithium Ion's, especially when you include the costs of the included converter/charger, monitoring and liquid cooling systems. Go to SmartBattery.com and you'll see just a 100 amp hour battery with just the monitoring circuitry is $1299.

So the breakthru here is the Tesla GigaFactory. They are going to start churning out cheaper and cheaper high grade lithium batteries. This is only the start - they already have plans for even more factories.

Could this device be used in an RV? I imagine it could in something large enough to house it. Dimensions preclude it in our eggs. The capacity is surely large enough to run an RV for a long time, but solar charging would take a considerable amount of panels to do it quickly. In RV's like my B-Class, the alternator or generator could recharge it pretty quickly.
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Old 05-05-2015, 06:33 PM   #39
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I.
Could this device be used in an RV? I imagine it could in something large enough to house it. Dimensions preclude it in our eggs. The capacity is surely large enough to run an RV for a long time, but solar charging would take a considerable amount of panels to do it quickly. In RV's like my B-Class, the alternator or generator could recharge it pretty quickly.
I believe it can be used either inside or out, so maybe it could be mounted on the front of the trailer in an upright position. If you had a battery like this installed, you wouldn't need your regular battery(s) and only need 1 propane tank (for those with 2).
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Old 05-05-2015, 07:02 PM   #40
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I was thinking that it could be mounted on the underbelly of a trailer. But it would have to be protected from the cold, as you cannot charge lithiums below 32 degrees F without damaging them.

On an Oliver, probably not a problem as there is the fiberglass hull and the aluminum frame crossmembers to support it.

But then the point is probably mute anyways - we already have a dedicated battery compartment that holds 440 amp hours of batteries. I've never gotten even down to 75% yet.
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Old 05-05-2015, 07:07 PM   #41
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Ron, How many batteries do you have?
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Old 05-05-2015, 07:10 PM   #42
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I have 4, 6 volt AGMs. My total capacity is 400 amp hours. You can get regular lead-acids which have a bit higher capacity (440), but I wanted to avoid the maintenance of them and also wanted something that won't freeze in extreme cold temps.
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