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

November 2007 Newsletter Navigation 
Page 4:  Solar Water Pumping

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Oasis Montana Site Map

Lorentz solar powered stock watering systems

Lorentz solar water pumpingIt’s never too early to start planning your spring or summer stock watering system and the Lorentz line of super efficient solar-powered pumps can help you get it done cost effectively. From their surface mounted centrifugals to submersible helical rotor pumps, Lorentz has a pumping solution that will fit almost every need and budget. For shallow well applications (less than 70’ deep) their amazing PS150-Centric submersible centrifugal pump can deliver high volumes of water with a small solar array. For deeper applications, the Lorentz PS200/600/1200 submersible helical rotor pumps can provide lower volumes of water from depths up to 760’. These helical rotor (or progressive cavity) pumps are positive displacement units which means that they will pump some water even in low light level conditions. They have brushless motors, but no problematic diaphragms so they don’t require any regular maintenance; that means that you can just set it and forget it. This will save you a lot of time, money and maintenance over the life of the pumping system. If something should go wrong, all of the electronics for the Lorentz submersible pumps are located in the above-ground control box which makes trouble-shooting and repair/replacement a lot easier than having to pull the pump. All of the Lorentz submersible pumps and controllers are covered by a 2-year manufacturer’s warranty against defects in material and workmanship except the PS150 Boost pumps which have a 1 year warranty. Please look over these Lorentz sample submersible pumping system below and let us know if any of them will meet your needs. If not, give us a call with the details on your particular pumping situation and we will design a system just for you.

Lorentz PS150 submersible centrifugal (shallow well, high volume)
1 Evergreen Spruce ES-190-RL 18V 190W solar module
1 single module top-of-pole mount structure (2” ID SCH40 steel pipe required)
1 15’ array-to-controller wiring kit
1 Lorentz PS150 pump controller
1 Lorentz CSJ5-8 submersible centrifugal pump
1 Lorentz low water sensor
1 float switch

Equipment total = Please call for pricing.
On average this system will produce ~2,100 gpd when pushing against 50’ of head with 5 hours of full sun per day.

Lorentz PS1200 submersible helical rotor (deep well, low volume)
4 Evergreen Spruce ES-190-RL 18V 190W solar modules
1 four module top-of-pole mount structure (4” ID SCH40 steel pipe required)
1 15’ array-to-controller wiring kit
1 Lorentz PV disconnect & junction box
1 Lorentz PS1200 pump controller
1 Lorentz HR-03H-2 submersible helical rotor pump
1 Lorentz low water sensor
1 float switch

Equipment total = Please call for pricing.
On average this system will produce ~600 gpd when pushing against 760’ of head with 5 hours of full sun per day.

Note: the PS600 & PS1200 systems can be powered by a 120/240 VAC generator or utility power during cloudy periods by using the Lorentz AC power pack.

Here’s the chart that shows the cost versus performance of four more Lorentz pumping systems; let us know if any of them will meet your needs. All systems come with detailed wiring diagrams.

Lorentz system description Head (feet) Volume (gpd)
PS150 Boost-125 surface mounted rotary vane 100 600
PS600 BADU Top12 surface mounted centrifugal 33 4,200
PS200 submersible helical rotor 130 1,100
PS600 submersible helical rotor 400 640

Head values listed include static and drawdown levels along with friction loss. Volume values shown assume a minimum of 5 full sun hours per day and are averages (i.e. your situation may vary somewhat). Prices shown do not include freight. Visit www.pvsolarpumps.com/water_pumping_questionnaire.html and answer the questions so
we can quote a system specific to your project needs….we basically need the following information:

  • What is the watering application? Domestic use, stock, irrigation, etc.?

  • How many full-time residents, or how many head of stock (and what type of livestock) will be needing the water?

  • Where is this system going to be located (city, state, country or latitude & longitude)?

  • What is your water source (well, pond/lake, spring, stream)?

  • What is its production rate?

  • If your source is a well, we need to know interior casing size, depth of the well, static water level from the ground, and what is the drawdown level from the ground?

  • Will this system need to push water to a tank or cistern located above your water source? If yes, what is the linear distance as well as the elevation difference between the water source and the storage tank? Also, what is the storage capacity of this tank or cistern?

  • Is there at present a pipe installed connecting the water source to your tank or cistern? If yes, what size is the pipe ID and what type (steel or PVC) is it?

  • Will this pumping system be used year round or seasonally?

  • We need to know your daily volume of water needed during each month of the year that the system will be in use.

  • Is there already a pump installed at this location? If so, we need to know what sort of pump it is (manufacturer, model number, AC or DC, operating voltage & amperage, years installed, etc.)

  • Any other details regarding your existing system or site that you feel may be helpful in our system design process.

Questions? Call us at 406-777-4321 or 877-627-4778.

“Real generosity towards the future lies in giving all to the present.” --Dietrich Bonhoeffer


November 2007 Newsletter Navigation 
Page 4:  Solar Water Pumping
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Oasis Montana Site Map
Now in autumn, we are enjoying cool and wet (even snowy) conditions, but it was one hot and smoky summer and fall for many parts of the western U.S., and Montana was no exception. We were smug with our good snowpack, back in spring. Then our summer started with a week of 100+ degree weather, and continued to stay hot. We were blanketed in smoke from the horrific fires (1.3 million acres burned) until the middle of September, and unfortunately, many homes and a few lives have been lost. We have been able to help some people with water pumping to protect their properties, but our drought conditions and warm temps made for a very dry western tinderbox. If only those folks in Texas could’ve share perhaps 1/20th of their deluge from their state…

Even so, the garden and fruit trees kept us busy, and despite the smoke we still enjoyed camping, fishing, and canoeing in our local river (even though the water was quite low). We hope our legislators will work on commonsense future measures to mitigate the effects of warming temperatures and prolonged drought. One thought we have had (since we were less than a mile from our local small airport, a helibase that launched many helicopters and other aircraft for fighting fires) is that actual planning for these events would be a good idea (seeing as they are now part of our new normal)—how about reservoirs near these airports to make hauling the big buckets faster and more affordable? Here in Stevensville, we have several large irrigation ditches in close proximity to our airfield…. Well, it’s just my 2 cents worth!

PICOCELL controller inverter for array-direct water pumping for your 240VAC AC pump
In this issue we have some new products to share; one is an exciting new AC pump controller/inverter that can run your 240VAC (or 120V, or 3 phase, or 230VAC 50 hz) 1/3 to 2 horsepower pump directly off of a solar array – click here for more information on the PICOCELL controller/inverter (cost: $1220 plus shipping). This exciting new technology is designed for off-grid use, or emergency back-up. We have installation manuals, spec sheets, and pump kit information on our water pumping site.  Call or e-mail for more information.

New, small Energy Star rated AC refrigerator
We also have a new, small AC refrigerator, 7.1 cu.ft. for your home or cabin, the CP972SS. It’s a great size for space-limited kitchens, only 22”W x 22”D x 57”H and will sell at the great price of $459 plus shipping. With its lean size, the CP972SS is the ideal refrigerator for studio apartments, yachts, offices, and other settings in need of reliable cooling in a slim-fitting footprint. Visit here for more information on this and other (larger) refrigerators.

The best nuclear generating station is 93 million miles away, and is available for pretty much everyone!
Thomas Edison quote on Solar Energy

Iron Edison Batteries
We also have a new line of batteries to offer, manufactured by Iron Edison;
visit our information on this exciting new product line.


The International Trade Commission (ITC) is responding to a lawsuit brought about by SolarWorld and Suniva (U.S. module manufacturers) that low cost imported (i.e. Chinese) solar modules have hurt their competitiveness, so they are asking for a tariff on imported solar panels to ‘level the playing field’. Many pro-solar groups are opposing these tariffs, as they will increase the dollar-per-watt cost of installed solar power systems, and very negatively impact job growth in the solar sector – which had been bourgeoning in the past few years. In fact, it is estimated that 1 out of 50 new jobs is in the renewable energy sector. The ITC has approved tariffs, but it will be up the President Trump to set the rate; those of us in the industry are waiting to see what will happen, and many jobs are on hold pending the decision. It sounds like costs may go up 10% to as much as 40%. For more information visit:  https://pv-magazine-usa.com/2017/10/31/breaking-usitc-recommends-quotas-tariffs-on-crystalline-silicon-solar-imports/  

Renewable Energy (and related) news bites

             1912 Warning on coal cuasing climate change



  • When autumn darkness falls, what we will remember are the small acts of kindness: a cake, a hug, an invitation to talk, and every single rose. These are all expressions of a nation coming together and caring about its people.
    --Jens Stoltenberg
  • Designers want me to dress like Spring, in billowing things. I don't feel like Spring. I feel like a warm red Autumn.
    --Marilyn Monroe
  • The cost of solar energy has not been opened up because the oil industry does not own the sun.
    –Ralph Nader
  • The spring, summer, is quite a hectic time for people in their lives, but then it comes to autumn, and to winter, and you can't but help think back to the year that was, and then hopefully looking forward to the year that is approaching.
  • A kestrel can and does hover in the dead calm of summer days, when there is not the faintest breath of wind. He will, and does, hover in the still, soft atmosphere of early autumn, when the gossamer falls in showers, coming straight down as if it were raining silk.
    --Richard Jefferies
  • I love nuclear energy! It's just that I prefer fusion to fission. And it just so happens that there's an enormous fusion reactor safely banked a few million miles from us. It delivers more than we could ever use in just about 8 minutes. And it's wireless!
  • I prefer winter and fall, when you feel the bone structure of the landscape - the loneliness of it, the dead feeling of winter. Something waits beneath it, the whole story doesn't show.
    -- Andrew Wyeth
  • There has been a systematic repression of solar energy. It seems pretty funny to me that the government, if it is completely neutral--why wouldn't they pursue this far safer alternative of solar energy with the same intent that they pursue nuclear energy? Solar power is the last energy resource that isn't owned yet--nobody taxes the sun yet.
    --Bonnie Raitt
  • The problem with winter sports is that--follow me closely here--they generally take place in winter.
    --Dave Barry
  • If we had no winter, the spring would not be so pleasant: if we did not sometimes taste of adversity, prosperity would not be so welcome.
    --Anne Bradstreet