Oasis Montana Inc.
Renewable Energy Supply and Design
406-777-4321or 4309
e-mail: info@oasismontana.com
Home Page: www.oasismontana.com

Visit us on the web for product and project information!
For grid-tied power systems, www.grid-tie.com
Solar water pumping:  www.PVsolarpumps.com
Non-electric gas appliances, www.LPappliances.com
Efficient and DC appliances, www.eco-fridge.com
And our main page at www.oasismontana.com

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Call 877-627-4778 or email us for the current pricing an any featured items listed within.


The Mirage of a Growing Fuel Supply
Mathematically, drilling more oil is a losing game.

Reprinted with permission, originally printed in the June 4th edition of the New York Times, written by Evar D. Nering, professor emeritus of mathematics at Arizona State University (A side note: it is generally considered that we have about 50 years of oil left, at the present rate of usage and current growth rate of 5%--and growing--per annum).

When I discussed the exponential function in the calculus classes I taught, I used consumption of a non-renewable natural resource as an example; since there is a national debate about energy policy, it may be useful to talk about the mathematics involved in making rational decisions about resource use.

Here’s the hypothetical situation: we have a 100 year supply of oil—that is, oil that would last 100 years if consumed at its current rate. But the oil is consumed at a rate that grows by 5% each year. How long will it last under these circumstances? It’s an easy calculation, about 36 years.

But let’s say we underestimated the supply, and we actually have a 1,000 year supply. At the same annual growth rate of 5%, how long will that last? The answer is about 79 years. Then let’s say we make a striking discovery of more oil—a bonanza—and now we have a 10,000 year supply. At the same rate of our growing use, how long would it last? Answer: 125 years. Estimates vary for how long currently known oil reserves will last, but all are considerably less than 100 years. But the point of this analysis is that it really doesn’t matter what the estimates are; there is no way that a supply-side attack on America’s energy problem can work.

Calculations also show that if consumption of an energy resource is allowed to grow at a steady 5% annual rate, a full doubling of the available supply will not be as effective as reducing that growth by half – to 2.5%. Doubling the size of the oil reserve will add at most 14 years to the life expectancy of the resource if we continue to use it at the currently increasing rate. On the other hand, halving the growth of consumption will almost double the life expectancy of the supply, no matter what it is. This math reality seems to have escaped the politicians pushing to solve the energy problem by simply increasing supply.

Building more power plants and drilling for more oil is exactly the wrong thing to do, because it will encourage more use. To avoid dire consequences, we need to find the political smarts and will to reduce the growth in energy consumption to zero—or even begin to consume less. I must emphasize that reducing the growth rate is not what most people are talking about when they advocate conservation; the steps they recommend are just Band-Aids. If we increase the gas mileage of our vehicles and then drive more miles, for example, that will not reduce the growth rate. Reducing the growth of consumption means living closer to where we work or play. It means telecommuting. It means controlling population growth. It means basic conservation techniques that work. It means shifting to renewable energy sources. It is not, perhaps, necessary to cut our use of oil, but it is essential we cut the rate of increase at which we consume it. To do otherwise is to leave our descendants in an impoverished world.

 —Mohandas Ghandi

Wind power — right for you?

There are several factors to determine the feasibility of wind generation at your site; the first is obviously a good average wind speed—at least 10 to 12 mph or better. Check with your local weather station or airports to help determine this. Zoning requirements are another consideration; will your community let you put up a tower?

Utilizing efficient appliances and lighting in your home will help make the system cost much less—every dollar spent on efficiency will save you three to five dollars in the cost of your power system, solar or wind.

To figure what components it would take for your system, we need to know 1) your power requirements in terms of watt-hours a day, or how much power you’d like to make with this system 2) the average wind speed 3) your peak loads (the total watts of all appliances, lights, etc., that might be running at one time—this is how we size the inverter) and 4) any special load considerations, like 240VAC loads, utility interactive or not, battery back-up or not.

Bergey Windpower Corporation now offers another option with their Excel 10 model: you can have your system hooked to utility power without batteries—a grid interactive system. When the wind blows, the power you make goes directly against your loads, and when you’re making more power than using, you can sell your power back to the utility. If you’re interested in this type of system, contact your local utility and ask what sort of net metering plan they offer.

Bergey Windpower has a great web site with state-by-state wind maps at www.bergey.com —if your zone rating is "3" or higher, you‘re likely in a very good site for wind generation. You can print pricing, spec sheets, installation manuals and tower options right off their site. For information on small wind gennies for remote cabins with modest power requirements, see

www.air403windgenerators.com/air_403.html —there are links at the bottom with more information on other components, basic wiring diagrams, etc.

Wind power is a vastly underdeveloped resource in this country; there’s enough viable wind power in eastern Montana and the Dakotas to supply the electrical needs of all of North America! But if you have a good site with consistent moderate to high winds, at least you can put it to work for you.

Bergey Windpower Corp’s XL.1 Wind Generator

This is the most technically advanced small wind turbine ever. It comes backed by a full five year warranty. The XL.1 is designed for high reliability, low maintenance, and automatic operation in adverse weather conditions. The unit comes with its own PowerCenter (controller) which includes the ability to add up to 30 amps of photovoltaic capacity. Owner installations are a snap with tilt-up tower options from 30 to 104 feet. . Units currently available are for 24V battery charging systems; the XL.1-S is in the forecast for next year, which will be a grid-interactive unit for batteryless systems! More voltage ranges are coming too.
* Five year warranty
* Maintenance-free design
* Nearly silent operation
*Good low wind performance
* Autofurl storm protection
* State of the art airfoil
* Direct-drive neodymium PM alternato

Bergey is swamped right now—lead time is 4 to 6 months for these popular units. Here’s data on the predicted energy production:

10.7 mph 12.1 mph 13.0 mph 13.9 mph 15.0 mph 18.8 mph
30 ft.
64 ft.
104 ft.

(above output is in Kilowatt Hours)

CONSERV Energy Efficient Refrigeration by Vestfrost

The ConServ refrigerator/freezers offer an AC alternative for efficient refrigeration. Available with stainless steel doors, and white exterior, their tall, slender design is a handsome addition to any kitchen, and their small "footprint" makes them desirable for apartment dwellers or for anyone with a small or galley-style kitchen.


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Greetings from our solar powered office!

In the event of a lengthy power outage, what are your critical loads?

With the presence of winter storms, hurricanes, tornados and aging grid infrastructure as part of daily life, many people are rethinking how reliable utility power really is, and we are getting more calls for back-up power for certain loads. Some of our customers just need to have power for charging their cell phones, Kindles, tablets or similar devices (and a couple of lights or a small TV for an hour or so); a small system for them might entail the following components:

System #1, small system: One ~300W solar module, 300W sine wave inverter, charge controller, 12V 55AH AGM battery, combiner enclosure with fuse, flush roof rack, panel output cable; $1449
For additional information on smallish, RV-type systems, visit http://www.oasismontana.com/RV_systems.html.

Other folks are concerned about losing their food if the grid goes down, so they’ll want to power their refrigerator and perhaps a freezer too. If your appliances are of more recent vintage, backing them up will cost much less than if they are older, less efficient models. An efficient refrigerator shouldn’t use much more than a kilowatthour a day, and a freezer might be in the ~1.5KWH range (but contact the manufacturer to be certain). A system to power those loads, plus a couple of lights, might entail these components:

System #2, medium system: (MS2812 Magnum inverter, 6 ~300W solar modules, 6X top of pole mount, Classic 200 MPPT charge controller, 4 L16 type batteries + cabling, battery monitor, interconnects, combiners and disconnects; $8700

If you don’t have city water, a common concern is powering your well pump. One can live without a lot of things but water is not one of them! And many deep well pumps are 240VAC; if you needed a backup power system to run your ½ HP 240VAC pump, say, one hour a day, plus extra power for a fridge and small loads, you might be looking at a system of this size:

System #3, large system: (Radian GS4048 – loaded, on a pre-wired power center that includes the charge controller, MATE3 system monitor, disconnects, etc., 12 – ~300W solar modules, 16 – L16 type batteries, pole mount, battery cabling = $14750

Costs do not include freight, installation, concrete footer for pole mounts, ground rod & clamp, and miscellaneous electrical widgets or wire runs.


Some people think solar modules are ugly – but I think they’re beautiful…and how wonderful it is to get electricity from sunlight!
And, you can enjoy saving money while saving the planet.


Are you looking at a stock watering project this year? Or you want power for a pump if the utility fails? Or perhaps you have a pond to fill, or fruit trees that need irrigating? A remote cabin? Contact us for all your remote water pumping needs; visit www.PVsolarpumps.com for more information.

If your only concern if the power goes out is water and you have a, say, 1.5 HP 240VAC pump, we can now run many of those pumps array direct whenever the sun is shining. So if you need water for irrigation or stock, this new PicoCell system might be just what you need. The PicoCell, from SunTech Drives, is now part of our line of quality solar products, and we look forward to the next generation of their solar evolution as the newer and more robust water pump solutions come on board. Being powerless doesn’t mean being waterless any more! Depending on your water pump make and model, we may have a solution for those times when the power is gone but the need for water exists and the sun is shining. Three-phase water pumps and motors under 2HP manufactured by Berkley, Franklin, Flint, Goulds, Grundfos, Myers and Wailing are all great candidates for using the new PicoCell from SunTech Drive to run your water pump while the sun is shining and conventional power is out. Single phase pumps up to 1HP from these same manufacturers, including Sta-Rite are able to operate effectively also. Call for more information or to see if your pump will work with a PicoCell. 406-777-4321

Cows LOVE solar water pumping!


We offer the Grundfos, SunRotor, Dankoff and Lorentz pump line, from submersible to surface pumps. And we can power your 240VAC pump too! 406-777-4321 for tech support on pump systems.


TAX SEASON is nearly upon us! If you had a solar power system installed and running by 31st December, 2017, you are eligible for a 30% tax credit of the cost of your solar module installation, less any state incentives or rebates. The 30% tax credit is still available through the end of 2019, so now the time is ripe for investment in the solar power system of your dreams. It is also available for certain types of solar thermal (hot water and space heating) systems. https://www.energystar.gov/about/federal_tax_credits/solar_energy_systems for the links about the federal tax credit; http://www.dsireusa.org for a state-by-state database of all renewable incentives; and https://www.irs.gov/pub/irs-pdf/f5695.pdf for the personal tax credit form. We are NOT tax experts, so when in doubt, consult your accountant or visit the IRS website at https://www.irs.gov/instructions/i5695?utm_source=Iron+Edison+Newsletter&utm_campaign=35a4413d23-EMAIL_CAMPAIGN_2018_01_22&utm_medium=email&utm_term=0_eaf26bfcab-35a4413d23-135295541&mc_cid=35a4413d23&mc_eid=6d3c772416

OUTBACK POWER has a new charge controller, the FlexMax 100! This will allow for longer strings of solar modules and is fully NEC 2014 compliant with the Outback ICS Plus. It offers:

> a rainproof outdoor IP54/Type PR enclosure
> 100A output for up to 5KW of charging
> suitable for 24, 36 or 48V battery banks
> updated MPPT software algorithm means more power than other controllers
> up to 99% efficiency; LED indicators status display
> Five year warranty
> system configures quickly (MATE3S required)
> minimum battery bank size: 100ah
> had built in GFCI, field-replaceable cooling fan
> built in 128 days of data logging

You can view more information on this exciting new charge controller at http://www.outbackpower.com/outback-products/make-the-power/flexmax-series-charge-controllers/item/flexmax-100?category_id=531
Now available at a special introductory price of $1045 plus shipping (offer good til 4/30/18)



MNChinook 200 Wind Turbine Now Officially Available http://files.constantcontact.com/aaa32e00401/5cc9c46b-fd24-4c58-8538-64e359dee783.jpg
The Chinook 200 is now new and improved, a direct-drive micro-turbine designed for use in 12, 24 or 48 volt DC battery charging applications. Its attractive low-profile design, exceptional performance in low winds and low rotor acoustics, make this turbine the ideal choice for almost any application. It’s also very quiet, and mounts on a 1.5” Schedule 40 steel pipe.

The Chinook 200 can also work hand-in-hand with PV panels to ensure that power is being generated in all weather conditions; they can be charging the same battery bank, and are also suitable for marine use. The MidNite Chinook Diversion Load (CDL) is an integrated solution designed to prevent 12, 24 or 48 volt batteries from overcharging and is included with the Chinook 200. Compact and easy to install, the CDL incorporates a 300 Watt resistive heating element and controller board in a powder coated steel enclosure. $995 plus shipping includes its dump load controller. The output voltage is not field selectable and must be ordered for either 12V, 24V or 48V battery charging. Designed in Montana and still made in the USA, if you have good average wind speeds (10-12 mph+) you will find this to be an excellent addition to your battery charging scheme.



SOLAR PANELS: Despite the 30% import tariff on certain incoming solar modules, there are still a lot of good deals to be had.

NEO Solar Power 360W Mono 72 cell, Tier 1 module Vmp 39.01V Imp 9.23A 77” x 35”, pallet quantity is 30; minimum order quantity is 10. Cost is $309 per module in pallet quantities.

MightyMax Solar 150W 12V nominal modules, 24/pallet, Vmp 17.7V Imp 8.47A 39.’” X 39”, cost is $215 each in pallet quantities.

Hanwha QCells Black Q.Peak G4.1 295W Vmp 32.19V Imp 9.17A 65.7” x 39.4”, minimum quantity 4, cost $269 each

Canadian Solar MaxPower CS6U-325P (poly), 325W, Vmp 37V Imp 8.78A 77.2” x 39.1”, minimum quantity 4, cost $298 each

LG Mono 330E1C-A5 330W AC module (includes Enphase IQ6+Micro-inverter) 66.38” x 40”, minimum quantity 4, $555 each (max string 13 of these AC modules)

SolarWorld Plus SW300 Mono 300W Vmp 32.6V Imp 9.31A 65.95” x 39.4”, minimum quantity 4, $360 each

GLC 325W Multicrystalline Vmp 37.6V Imp 8.64A, 77” x 39.05”, 26 per pallet, cost is $269 each in pallet quantities.

We can also source a variety of other solar products including Trina, ET Solar, Yingle, Jinko, Csun, etc.
Many of our suppliers have a substantial fee for less than pallet quantities.


Yes it’s finally SPRING and we are offering our gorgeous indigenous corn seed to you for the price of postage. An ounce is about 100 seeds and (since the P.O. considers this a ‘package’), cost to mail you about 1.5 ounces is $1.21

No power is no problem with our gas refrigerators – now featuring the new economical HOMESTEADER line by Diamond

The manufacturers of the Diamond propane gas refrigerators are now offering a non-CSA certified offering available as a refrigerator/freezer unit in 19 cu.ft. and 21 cu.ft. capacities. While this means we cannot ship these to Canada, their cooling performance is not compromised in any fashion – in fact these have the same identical cooling unit as those installed in the Diamond gas fridges of the same size. These are some of the finest performing gas absorption units in the industry. Both sizes will be offered in the popular white, black and also stainless steel finishes, and they are less costly than most other models in the full size range. Here are the specifications:

19 cu.ft. Homesteader





Our customer Rick Freeman from southern California swaps out his old batteries for new to re-charge his PV system.
These 6V batteries weigh about 110 lbs. each.



  • “Spring won’t let me stay in this house any longer! I must get out and breathe the air deeply again.”
    --Gustav Mahler

  • "We have to prepare our cities for the increasing scarcity of resources by increasing their density and energy efficiency." -- Mathis Wackernagel

  • "Saying that you don't care about privacy because you got nothing to hide is no different than saying that you don't care about freedom of speech because you got nothing to say."
    --Edward Snowden

  • “April hath put a spirit of youth in everything.”
     --William Shakespeare

  • "In reality, studies show that investments to spur renewable energy and boost energy efficiency generate far more jobs than oil and coal."
    --Jeff Goodell

  • “Now every field is clothed with grass, and every tree with leaves; now the woods put forth their blossoms, and the year assumes its gay attire.”

  • “At the end of the day, no amount of investing, no amount of clean electrons, no amount of energy efficiency will save the natural world if we are not paying attention to it - if we are not paying attention to all the things that nature give us for free: clean air, clean water, breathtaking vistas, mountains for skiing, rivers for fishing, oceans for sailing, sunsets for poets, and landscapes for painters. What good is it to have wind-powered lights to brighten the night if you can't see anything green during the day? Just because we can't sell shares in nature doesn't mean it has no value.”
    --Thomas Friedman

  • “Spring is the time of plans and projects.”
    --Leo Tolstoy

  • "As the saying goes, the Stone Age did not end because we ran out of stones; we transitioned to better solutions. The same opportunity lies before us with energy efficiency and clean energy."
    --Steven Chu

  • “Never cut a tree down in the wintertime. Never make a negative decision in the low time. Never make your most important decisions when you are in your worst moods. Wait. Be patient. The storm will pass. The spring will come.” --Robert H. Schuller

  • "Of all the questions which can come before this nation, short of the actual preservation of its existence in a great war, there is none which compares in importance with the great central task of leaving this land even a better land for our descendants than it is for us."
    -- President Theodore Roosevelt

Please feel free to share this newsletter – knowledge is power!

Visit us on the web for product and project information!
For grid-tied power systems, www.grid-tie.com
Solar water pumping:  www.PVsolarpumps.com
Non-electric gas appliances, www.LPappliances.com
Efficient and DC appliances, www.eco-fridge.com
And our main page at www.oasismontana.com