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+ WHAT TYPES OF SOLAR &/OR RENEWABLE ENERGY POWER SYSTEMS ARE THERE AND HOW DO THEY WORK?
WHAT TYPES OF SOLAR &/OR RENEWABLE ENERGY POWER SYSTEMS ARE THERE AND HOW DO THEY WORK?
+ WHY SHOULD I CONSIDER A SOLAR POWER, RENEWABLE ENERGY OR BACKUP POWER SOLUTION?
WHY SHOULD I CONSIDER A SOLAR POWER, RENEWABLE ENERGY OR BACKUP POWER SOLUTION?
+ WHERE DO I START IF I'M CONSIDERING SOLAR AND/OR RENEWABLE ENERGY
WHERE DO I START IF I'M CONSIDERING SOLAR AND/OR RENEWABLE ENERGY
+ MISCONCEPTIONS & URBAN LEGENDS IN THE SOLAR & RENEWABLE ENERGY BUSINESS
MISCONCEPTIONS & URBAN LEGENDS IN THE SOLAR & RENEWABLE ENERGY BUSINESS
+ WHAT ARE THE KEY CONCEPTS TO UNDERSTANDING HOW SOLAR GEYSERS AND HOT WATER HEATING WORKS?
+ HOW DOES SOLAR WATER PUMPING WORK?
HOW DOES SOLAR WATER PUMPING WORK?
Solar water pumps have been in production since the 1980's. The concept is rather straight forward, even though a lot of cutting edge design, engineering and manufacturing has gone into the process of manufacturing these pumps; A solar panel array (1) converts sunlight into High voltage DC electrical current (power), the array is connected to a controller box (2) (linear current booster / MPPT / Maximum Point Power Tracker) that converts the high voltage DC to low voltage and then drives a special low voltage submersible Solar Water Pump (3)(Helical or Centrifugal type depending on delivery and depth requirements). The motor and wet end then pumps the water out of the borehole, river, dam or pit into a tank, reservoir or dam. The pump continues to deliver water for most of the daylight hours. Batteries can also be used to drive the pump, but in most cases this is not necassary. There are also dry run protection prods (for the pump) as well as over-flow/tank prods available that prevents the motor from running dry and/or the tank/reservoir from running over.
These solar water pumps (e.g. Oil/water based etc) are suitable to provide waters for: domestic use (pottable water), drinking water supply, irrigation, lifestock watering (suiping), pressurising, pond management, etc. (GPS monitoring/related @ e.g. switchup etc can be installed on SEG pumps, same applies to other power products!)
+ WHAT ARE THE MAIN REASONS FOR CONSIDERING A SOLAR WATER PUMPING SYSTEM?
WHAT ARE THE MAIN REASONS FOR CONSIDERING A SOLAR WATER PUMPING SYSTEM?
Cost effectiveness and long life: Once the pump has been bought and installed there are no running costs. With generators there are fuel and maintenance costs and the effort of keeping the tank full. With 220/360 Volt electrical pumps (dompel pompe) there is the cost of power and monthly Escom pole fees. With wind mills there is maintenance costs and well as the fact that the least amount of wind is available when water is needed the most. Sun is also more reliable than wind. We can build a pumping system for a deep well at a modest cost.
Low to no maintenance: The pumps are brushless, permanent magnet, oil filled units that are build to last many years in the field and since they are located a number of meters below ground they usually cannot be physically damaged. The solar panels typically have a 25 year warranty on their efficiency, if the rain does not wash the dust off the panels, then dust needs to be cleaned off every so often. The control boxes as also very reliable and water proof. So all in all it is a straight forward sytem with little room for error. The pumps can also be installed by hand and pulled up easily if need be.
Ideal for remote and rural areas: These pumps can work in areas where it would be very expensive to have grid power (Escom power) installed and can operate independently. Once installed and setup the pumps work on their own and do not need to be switched on or off. The pumps start pumping when the irridation from the sun reaches a certain level (in the morning) and stops when it falls below a certain level (late afternoon). Due to dry run protection prods and overflow protection prods that are installed with the pumps, they do not have to be manually monitored and swithched off.
Water when you need it: Solar pumps pump the most water during dry and sunny weather/days when it is needed most. Also works well on low yield boreholes (syfer boor gate) which only allows for drawing off small amouts of water over a longer period. Other pumps tend to pump these holes dry.
Pumping from multiple sources to multiple storage units: Solar water pumps can pump water from boreholes, dams, rivers, deep wells, shallow wells, ponds, streams, aquifers, etc. One can pump water to tanks, dams, aquaducts, cripps, animal watering ponds & holes, etc.
Suitable for various uses: Domestic (home use) water, off-grid homes, farms & cabins, aquaculture, livestock watering (suiping), etc.
Access to good quality, abundant water resources: Water may well be abundantly present on the Earth, but the salt water of seas and oceans accounts for 96.4% of the total water volume. Fresh water only accounts for 3.4% of the total volume of water on our planet. This supply of fresh water is broken down as can be seen below:
2.15% is contained in glaciers or permanent snow (this makes up about 70% of the total fresh water)
0.019% constitutes the surface waters : lakes, rivers of all sizes (about 0.6% only of the total fresh water)
(Please note only pumps made to work on this method (to be discussed) is cost effective, to put ANY 220 volt pumps especially to work from alternatives are not cost effective EVEN IF QUOTATION WAS/IS BASED ON PREPLANNING/NOT, there are e.g. Battery sustainability issues ETC; concerning all/any companies; Please be vigilent concerning " too good too be true quotations"; applied to this phenomenon especially, within industry). This prinsiple applies in general to all appliances (bought anywhere) not made to run of renewables (called non ecofriendly appliances etc), even if used for shorter periods of time. ALL Dc appliances must not work straight from batteries (any type), controllers are recomended, please see solar book section/consultation sessions for more! Savings are clean & easy with SEG!
+ What are the different types of batteries you get?
absorbed glass mat (AGM) battery
A relatively new type of sealed battery construction that uses saturated absorbent glass (boron silicate) mats between the plates instead of a gelled or liquid electrolyte. AGMs batteries are more expensive than the flooded (liquid) variety but offer a number of advantages.
An electrochemical battery that uses lead and lead oxide for electrodes and sulfuric acid for the electrolyte. Lead-acid batteries are the most commonly used in photovoltaic (PV) and other alternative energy systems because their initial cost is lower and because they are readily available nearly everywhere in the world. There are many different sizes and designs of lead-acid batteries, but the most important designation is whether they are deep cycle batteries or shallow cycle batteries.
Deep cycle batteries are designed to be repeatedly discharged by as much as 80 percent of their capacity so they are a good choice for power systems. Even though they are designed to withstand deep cycling, these batteries will have a longer life if the cycles are shallower. All lead-acid batteries will fail prematurely if they are not recharged completely after each cycle. Letting a lead-acid battery stay in a discharged condition for many days at a time will cause sulfation of the positive plate and a permanent loss of capacity.
lead-acid battery maintenance
The quickest way to ruin lead-acid batteries is to discharge them deeply and leave them stand "dead" for an extended period of time. When they discharge, there is a chemical change in the positive plates of the battery. They change from lead oxide when charged to lead sulfate when discharged. If they remain in the lead sulfate state for a few days, some part of the plate does not return to lead oxide when the battery is recharged. If the battery remains discharged longer, a greater amount of the positive plate will remain lead sulfate. The parts of the plates that become "sulfated" no longer store energy. Batteries that are deeply discharged, and then charged partially on a regular basis can fail in less than one year.
Always use extreme caution when handling lead-acid batteries and electrolyte. Wear gloves, goggles and old clothes. The sulphuric acid in lead-acid batteries will burn skin and eyes and destroy cotton and wool clothing. Adopt these specific measures for maximum safety:
1. Someone should be within range of your voice to come to your aid when you work near batteries
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