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


Oasis Montana Renewable Energy Newsletter July 2002 page 3

RV Power Products Solar Boost™ MPPT
 Charge Controllers

Who says you can’t get something for nothing? The line of Solar Boost™ charge controllers from RV Power Products can increase your solar array’s output by 30% or more* when compared to conventional charge controllers. Depending on the size of your solar array, that could be like getting the output of an additional solar module (or two) for free! The Solar Boost™ charge controllers do this by using maximum power point tracking (MPPT) to extract the highest amount of power from your solar array. MPPT forces the solar module(s) to operate at a higher voltage than normal which puts them as close to their maximum power point as possible. Other charge controllers simply connect the solar module(s) to the battery and let them operate at whatever the battery voltage is. If the battery voltage is low, this can be wasting 30% or more of the solar module’s output.

There are three different Solar Boost™ charge controllers available and they are all covered by a 3 year limited warranty. The SB2000E is a 12V, 25A unit intended mainly for RV applications and it comes with a built in LCD display. Then there are the SB50L and SB3048L units that are UL listed and intended for residential or commercial applications. The SB50L is a 50A, 12 or 24V unit while the SB3048L is a 30A, 24 or 48V unit. Both the SB50L and SB3048L will allow you to step up your solar array voltage to 24 or 48V respectively while charging a lower voltage battery bank. This feature comes in handy if you have a large solar array that is some distance away from your battery bank because it minimizes the voltage drop as well as the array wire size required. RV Power Products offers several options for their Solar Boost charge controllers including LCD displays (front panel & remote), a battery temperature sensor and a wall mount box (SB2000E). Call us for prices on all of these options as well as sizing assistance. While the line of Solar Boost charge controllers might be more expensive than other units on the market, keep in mind that in addition to getting a state of the art charge controller you are also getting additional solar power from your modules. Now that’s a great deal!

 

Problems cannot be solved at the same level of awareness that created them.         —Albert Einstein

 

SMA Sunny Boy Inverters

You don’t have to live out in the boonies to use solar power!
The exciting line of Sunny Boy grid-tie inverters from SMA makes it easy for the majority of us that are connected to the utility grid to use the clean energy from the sun. Founded in Germany in 1981 as an engineering/control systems company, SMA started producing the Sunny Boy line of inverters in 1996. They currently manufacture 1800 and 2500W units for use here in the United States as well as 700 and 1100W units for the European market. These inverters allow you to install a photovoltaic system without having to worry about purchasing an expensive heavy battery bank. The DC power that is produced by the solar array is inverted to AC by the Sunny Boy inverter after which it is either used by your AC appliances or sold back to the utility grid to lower your monthly utility bill. The Sunny Boy units are called "string" inverters because they are designed to be wired to a single series string of 12-24 solar modules. This makes the solar array wiring very easy since you don’t have to worry about paralleling multiple strings of solar modules together in a combiner box. However, the high DC voltage that this series string of solar modules produces needs to be handled very carefully because it can be lethal! To minimize the potential shock hazard of this system’s high DC voltage, the solar array wiring should be done with all of the solar modules lying flat on the ground or roof after which the entire array can be lifted or tilted into place. If that is not possible, be sure to completely and securely cover each and every solar module with a heavy opaque material (blanket, cardboard, tarp, etc.) before wiring the array. A professional installer is recommended for those not familiar with these systems.

The 1800 and 2500W Sunny Boy inverters are both UL listed, come with a 5 year warranty and have a built-in ground fault protection device that is required by the NEC for roof mounted solar arrays. The optional Sunny Boy Display (SBD) can be ordered separately or integrated into the front of the inverter at the time of purchase. The SBD is the simplest meter option and it continuously scrolls through the following 6 parameters: AC power (W), PV voltage (VDC), total energy yield (kWh), daily energy yield (kWh), operating hours and inverter status. The other option for monitoring and controlling the output of a single Sunny Boy inverter is to install an optional RS-232 module inside the inverter. This in conjunction with the Sunny Data software running on your PC will allow you to monitor the performance of your Sunny Boy inverter. If you plan to install a large solar array that would require multiple Sunny Boy inverters, then your best bet is to install a power line carrier module in each inverter and connect them all to a single Sunny Boy Control unit where the data can be monitored and/or stored for later use.

We could go on and on about all of the features and options of the SMA Sunny Boy inverters, but we don’t have enough space here to do so. We have listed some of the key components below along with a short description and price. If you would like some more specific information on any of these items or would like to place an order for one of these exciting new grid-tie inverters, please don’t hesitate to call us.

MODEL NUMBER / DESCRIPTION / PRICE
SWR 2500U, 2500W, 240VAC, 60 Hz, UL listed string inverter, ground fault protection device included
SWR 2500U SBD, 2500W, 240VAC, 60 Hz, UL listed string inverter with GFP device and LCD display $
SWR 2500U-208, 2500W, 208VAC 3-phase, 60 Hz, UL listed string inverter, GFP device included $
SWR 2500U-208 LCD, 208VAC 3-phase, 60 hz, UL listed inverter with GFP device and LCD display $
SWR 1800U, 1800W, 240VAC, 60 Hz, UL listed string inverter with GFP device included $
SWR 1800U SBD, 1800W, 240VAC, 60 Hz, UL listed string inverter with GFP device and LCD display $
SBD Sunny Boy Display, 2-line LCD  continuously scrolling through six operating parameters $

Other options available, including data communications with a PC, remote communications, and modular control systems.  email us for more details.

 

Efficient Appliances — one of the first steps in energy independence is to reduce your electrical power requirements. Here are some viable options.
ConServ AC refrigerator/freezer white or with stainless steel doors and matching gray sides.
Energy Star rated clothes washers
For more info see http://www.eco-fridge.com

Current Summer 2002 Newsletter

Page 1 Page 2 Page3 Page4
Other Sites of Interest:
Renewable Energy Gas Appliances Solar Modules Efficient Appliances

Visit our Renewable Energy
Quick Link Site Map

 
 

Solar Array Flag
Independent power is as American as apple pie!

There’s never been a better time to go solar!

This is the last year for the 30% federal solar Investment Tax Credit (ITC) for a solar power system. Then it will drop 4% and be at 26% for 2020; this includes installations on both residential and business properties – and may even include your RV, if you can call that a second home. The federal tax credit for all installations will end by the end of 2022.mounted solar array

You can also find out what state incentives are available for you at www.dsireusa.org. In some states, their incentives, combined with the ITC, can negate up to 80% of the system’s total cost. And all costs are deserving of the credit with the ITC, including permitting, installation and shipping (and perhaps even a new roof if it is needed).

If you use some tax software, it should ask you if you’ve installed a solar power system in the past year, but if not, and you do your own taxes, be sure to fill out IRS form 5695 – and keep all of your receipts related to your system purchase. IF you need a link to that residential tax form, here it is: https://www.irs.gov/pub/irs-pdf/f5695.pdf

Reducing or negating your utility bills, and gaining energy independence (an American value!) through solar power has never been a better deal!


The Importance of WATER...

You can live without a lot of things in the world, but water isn’t one of them; clean potable water is running low or just becoming unavailable in many parts of the world, including the U.S. We’ve been engaged in solar water pumping for two decades, and there’s been many changing technologies to address water needs for residential use, and commercial endeavors such as irrigation, livestock, fish farms and wildlife management. One of the latest is to run a 240VAC pump array direct – that is, it will run when the sun is shining, and requires a solar array but no batteries. These will run a variety of pumps, 120/240V, three-phase, and change a 1 or 2 speed motor pump to a soft start. You can view information about this new technology at http://www.pvsolarpumps.com/PDFs/PicoCell Spec Sheet_Oasis Montana.pdf

Now there are even more options; if you have the need for higher amperage and horsepower, the Picocell will now handle up to 3 HP and 12 amps. These solar-powered pumps will allow your home or business to qualify for a variety of tax credits, grants, and incentive programs. If you are looking for something to power your large AC pump, We Have It!  Check out our new Picocell controllers.  Give us a call for more information, 406-777-4321.

And if you’ve been thinking of an off-grid water pumping project, you are likely to enjoy this short video from one of our pump suppliers, Lorentz.
https://www.youtube.com/watch?v=9vbONlDqmZQ


If you are a Montanan: Northwestern Energy is proposing some bad news for its net-metered customers; more information at http://montanarenewables.org/programs/general-electric-rate-case/

And if you really want to help support renewable energy in MT, please consider joining the Montana Renewable Energy Association (http://montanarenewables.org/about-us/join-mrea/). They’ll keep you informed as to legislative issues, promote our annual energy fair and offer an informative web site to help promote the advantages of renewables (www.montanarenewables.org). Please consider joining today! Your membership will make a difference.

Why energy efficiency is SO important.

http://files.constantcontact.com/0cef2499301/ac396408-0aa7-45c8-81b7-c3905aebed37.jpg

The cheapest power is that which we do not use.   https://nwenergy.org/ for more information!


Is this proper grounding?
Power line down at river crossing

Power line down at river crossing, often local power production is more dependable

Sometimes utility power is at the mercy of the elements,
as shown by these downed power lines in a flooding Montana river.

We caught these picture canoeing the Bitterroot River last June.


 

Is small wind right for you? Here’s your opportunity to find out!
For a limited time only, we are offering the Chinook wind turbine for half-price, at $495 plus shipping. You won’t find a better deal for a quality, American-made wind generator! With a top end of 250W output, this can be a valuable addition to your battery charging set-up if you regularly have winds of 10-12 mph or greater. These mount on 1.5” schedule 40 steel pipe and come with their own dump load controller. They are available as a 12, 24 or 48V charging unit, and were originally designed and built in Montana (so you know they are tough).

We’ve had one of these here at Oasis Montana for about five years now, and it still works great. Every spring and summer, we have winds in excess of 80 mph but it keeps quietly making power for our 48V battery bank. These are also suitable for marine use, to help keep your navigation equipment charged and working (as the wind on the water generally seems to be blowing most of the time). We have installation manuals and other information we can send you on these; call if you are interested, 406-777-4309, e-mail us at Oasis or visit our web page at http://www.air403windgenerators.com/chinook-wind-generator.html.

 


System Spotlight

We assisted Bryan & Shannon Tarter of southeastern Montana in their system upgrade, adding more solar modules
and going from a 12V system to replacing with a new 48V inverter for their remote home. Nice going!


STAINLESS DOOR REFRIGERATOR FOR SMALL KITCHENS

If you have a space-challenged kitchen (or a small cabin needing a fridge), we have an efficient, beautiful AC refrigerator option for you.
MODEL FF923PL (uses only 865 watt-hours per day, or .865KWH).

.attractive ff923 refrigerator with door open

 

Attractive FF923pl Stainless refrigerator

FF923pl SPECIFICATIONS:

Height of Cabinet

66.63" (169 cm)

Height to Hinge Cap

67.13" (171 cm)

Width

21.25" (54 cm)

Width with Door Open

22.0" (56 cm)

Depth

23.25" (59 cm)

Depth with door at 90°

43.0" (109 cm)

Capacity

8.9 cu.ft. (252 L)

Defrost Type

Frost-Free

Door

Stainless Steel

Cabinet

Black

US Electrical Safety

CSA

Canadian Electrical Safety

CSA-C

Energy Usage/Year

316.0kWh/year

Amps

0.9

Voltage/Frequency

115 V AC/60 Hz

Weight

110.0 lbs. (50 kg)

Shipping Weight

115.0 lbs. (52 kg)

Parts & Labor Warranty

1 Year

Compressor Warranty

5 Years

Price (before shipping)

$585

We have other efficient refrigeration options available; visit www.eco-fridge.com for AC & DC offerings, and www.LPappliances.com, for refrigerators, freezers and gas ranges that operate off of NG or LP gas with NO electrical requirements.


Solar electric power from the sunInverters, solar modules, tariffs & trade deals

The import tariffs put on many incoming products hasn’t terribly hurt the renewable energy sector. True, employment in the solar power field has dropped a couple of percentage points in the past 18 months, and some utility-size projects were put on hold, but in general renewable energy jobs are still a very a bright spot in the U.S. economy. Renewable technologies are a global industry; many solar modules considered ‘made in the USA’ still have cells made in other countries; likewise inverters and inverter parts are often made abroad. If you are looking to buy American, Mission Solar, Panasonic and SolarWorld are cranking out high-quality modules in our fair country, and we also have access to Longi, Seraphim, Canadian Solar, Trina, Jinko, LG, Silfab, CSun, Yingli and more. We can also get ahold of some of the smaller, 12V nominal modules that are sometimes difficult to find. Let us know what you need for your power project, and we shall find what you seek!


 


 

Batteries for back-up power: what are your critical loads?

6v batteries wired in series for 48 voltsThe least costly way to get into solar power (if you are hooked up to a utility) is to have a batteryless, grid-tied power system; when the sun shines, the solar modules on your roof or mounting rack make power that goes into an inverter, which converts the electricity into grid-palatable AC power and makes your meter spin slower – or makes your meter spin backwards, if you are making more power than you use. It’s a simple and direct method of reducing or negating your utility bill. However, without batteries, if the power goes out, these systems shut down (to keep the power lines from being live to protect any line workers). It can be frustrating to have a solar power system but not be able to use it if the power goes down!

There are now ways to add battery back-up to these kinds of power systems. The number of batteries needed will depend on the loads you want to power. It may be very costly to, say, power your entire home or business but if you have any important loads (like a refrigerator, or keeping necessary computers on line) – that’s how we design the size of the battery back-up needed. If your power outages are brief and rare, then you won’t need the number of batteries that someone might need if the power tends to go out for days at a time! Like any other system design, the electrical load information is most important.

We have a lot of basic battery information at www.oasismontana.com/batteries.html; most of the information is about FLA (flooded lead-acid) batteries, but we offer a lot of other options for battery back-up. Call us if you are interested in back-up power in the event of a utility outage!

 


Renewable Energy News Bites


WINTERING CHICKENS AT THE OASIS IN WESTERN MONTANA

Anyone who knows me, knows I am a chicken fancier and raise batches of chickens from time to time. Some of my friends even refer to me as the ‘chicken whisperer’.

Organic Chickens at Oasis Montana

 I’ve been keeping chickens for nearly forty years, and was raised around them as a kid, and I’ve learned some tricks about helping them to survive winter in good health. One of them is to keep clean water in front of them at all times. I have one of those heated dog waterers; it holds about a gallon; I put fresh water out every morning then top it off later in the day, and that provides enough water for my 14 chickens. The waterer itself uses about 40 watts, and when it gets above freezing it shuts off as it is thermostatically controlled. So it is not a large electrical load on my solar power system (still, that’s almost a kilowatt-hour a day when it’s cold). There are companies that sell heated chicken waterers, but they tend to use substantially more power.

I have a small chicken house that is only 6 x 8 on the floor area, but with the nests and built-in roosts, it’s pretty easy to keep clean, and its smaller size enables the chickens to stay warmer in winter than they would in a larger shed. I use a good grass hay for bedding, and rake it out when it getsOrganic eggs grown at Oasis Montana Inc. soiled (and have enough from ‘the girls’ to side dress all of my fruit trees with the manure and hay at least once a year). I have to clean their house more in winter, as the days are shorter and they spend more time indoors. But I do have a 10W LED light and timer that comes on in the chicken house about 3 a.m. – and that increases the photoperiod enough that my hens lay very well through the darkest time of the year. I used to think that hens needed some ‘time off’ in the winter – but I no longer believe that is true; when a hen chick is hatched, she contains all the embryonic eggs she will ever lay, so it’s up to us to provide the nutrition and environment to maximize their egg-laying capabilities.

There are breeds that are certainly more suitable for colder climates (and I won’t go into that in great detail, as there’s lots of information about that available), but the breeds I favor are for hardiness and egg-laying ability. The Plymouth Rocks and Ameraucanas are high on my list (and I love the colored eggs), although I presently have some crossbreeds that are prolific layers of large eggs. I feed my chickens organic grains; it’s considerably more costly but – when you consider what goes into chicken feed (mostly corn and soy) – I’d rather not have any transgenic pesticides in their feed. I eat (and sell) their eggs and sometimes I eat my chickens too, so I want all to be of the highest quality and free of chemicals.

We have designed systems for barns and sheds to provide lighting; like all systems it all depends on how much power you need and the loads you desire to run. We don’t get a lot of sun in the winter, here on the western side of the continental divide, and I don’t have a separate system just for the chicken house; we run an electrical line out there from my inverter system that powers my home/office. And the results are gorgeous, tasty eggs and healthy chickens.
 


Quotable quotes

"One doesn’t have to operate with great malice to do great harm. The absence of empathy and understanding are sufficient.”
-Charles M. Blow

“People don’t notice whether it’s winter or summer if they’re happy.” 
–Anton Chekhov

 “Winter is not a season, it’s an occupation.” 
–Sinclair Lewis

 “Optimize the way we use the world’s resources.  Do more with less.  Don’t wait for the politicians.  See what needs to be done and do it.” 
–R. Buckminster Fuller                                              

 “Ah, the Summer Solstice, all is green and growing, potential coming into being, the miracle of manifestation painted large on the canvas of awareness.  At the Winter Solstice, the wind is cold, the trees are bare, and all lies in stillness beneath the blanket of snow.” 
–Gary Zukav

“Humans have complicated every simple gift of the gods.” 
–Diogenes

“Bad days happen to everyone, but when one happens to you, just keep doing your best and never let a bad day make you feel bad about yourself.”
-Big Bird

“People of North America, may the example of all those nations that have preceded you, and especially that of your motherland, instruct you. Beware of the affluence of gold that brings with it the corruption of morals and the scorn of laws; beware of an unbalanced distribution of wealth that will give rise to a small number of opulent citizens and a horde of citizens in poverty, a situation that will engender the insolence of some and the deprivation of others.” 
-Diderot

“I had always hoped that this land might become a safe and agreeable asylum to the virtuous and persecuted part of mankind, to whatever nation they might belong.”
- George Washington

 
 

 

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