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Grupo Casa Saba, S.A. de C.V. C Message Board

investors_liberation_movement 1445 posts  |  Last Activity: May 11, 2015 9:04 PM Member since: Jul 6, 2010
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  • investors_liberation_movement by investors_liberation_movement May 11, 2015 9:04 PM Flag

    are available everywhere in the United States, although some areas receive less sunlight than others,
    depending on the climate and seasons.
    The greatest solar resources are located in the Southwestern states, where sufficient solar energy
    falls on an area of 100 miles by 100 miles to provide all of the nation's electricity requirements.--EPA

    Sentiment: Strong Sell

  • Reply to

    Sonnenbatterie

    by investors_liberation_movement May 8, 2015 10:10 AM
    investors_liberation_movement investors_liberation_movement May 11, 2015 8:53 PM Flag

    fyi: CBAK profile
    China BAK Battery, Inc., together with its subsidiaries, focuses on developing, manufacturing,
    and selling high-power lithium batteries in China and internationally.
    The company’s products are used in various applications, including electric vehicles,
    such as electric cars, electric buses, hybrid electric cars, and buses; light electric vehicles,
    such as electric bicycles, electric motors, and sight-seeing cars; and electric tools, energy storage,
    uninterruptible power supply, and other high power applications.
    China BAK Battery, Inc. was founded in 2001 and is based in Dalian, People’s Republic of China

    Sentiment: Strong Sell

  • Reply to

    DC vs. AC

    by investors_liberation_movement May 11, 2015 8:48 PM
    investors_liberation_movement investors_liberation_movement May 11, 2015 8:50 PM Flag

    Search Web "Direct Current Appliances"
    NOTE especially "DC House" Realizing a cost-effective zero net energy building
    through direct current (DC) residential distribution Jul 29, 2011 by Satish Rajagopalan
    and Brian Fortenbery, EPRI | Electrical Construction and Maintenance
    (ecmwebdotcom/contractor/dc-house)

    Sentiment: Strong Sell

  • investors_liberation_movement investors_liberation_movement May 11, 2015 8:42 PM Flag

    My point is self-evident to those who've read my posts.
    Obviously one shouldn't buy an inverter unless one intends
    to profitably SELL surplus electricity to the utility.
    Buying an inverter to change rooftop-solar DC to AC for in-house use
    is highly inefficient because most appliances are DC. All electronics are!
    Many ENPH clients are probably mistakenly buying an expensive inverter
    rather than a battery and a few DC appliances to replace AC-only ones.
    Perhaps some will sell their "pre-owned" inverters after going off-grid.

    Sentiment: Sell

  • investors_liberation_movement by investors_liberation_movement May 11, 2015 8:11 PM Flag

    Established by The Energy Policy Act of 2005, the federal tax credit for residential energy property
    initially applied to solar-electric systems, solar water heating systems and fuel cells.
    The Energy Improvement and Extension Act of 2008 extended the tax credit to small wind-energy
    systems and geothermal heat pumps, effective January 1, 2008. Other key revisions included an
    eight-year extension of the credit to December 31, 2016; the ability to take the credit against the
    alternative minimum tax; and the removal of the $2,000 credit limit for solar-electric systems beginning
    in 2009. The credit was further enhanced in February 2009 by The American Recovery and
    Reinvestment Act of 2009, which removed the maximum credit amount for all eligible technologies
    (except fuel cells) placed in service after 2008.

    A taxpayer may claim a credit of 30% of qualified expenditures for a system that serves a dwelling unit
    located in the United States that is owned and used as a residence by the taxpayer. Expenditures with
    respect to the equipment are treated as made when the installation is completed. If the installation is at
    a new home, the "placed in service" date is the date of occupancy by the homeowner. Expenditures
    include labor costs for on-site preparation, assembly or original system installation, and for piping or
    wiring to interconnect a system to the home.

  • investors_liberation_movement by investors_liberation_movement May 11, 2015 7:46 PM Flag

    is exclusively manufactured at the company's headquarters in Allgäu
    has also been TÜV certified since 2011.
    Sonnenbatterie GmbH consistently invests in research and development that also predominantly
    takes place at the company's Bavarian headquarters. The detailed data of several hundred systems,
    which have been evaluated using anonymous online monitoring since 2011,
    form the solid and realistic basis for the customized development of the Sonnenbatterie.
    In 2010 the practical feasibility of the first Sonnenbatterie were tested in several single-family homes
    under real world conditions. Once the fine-tuning based on these findings had been completed,
    the Sonnenbatterie was introduced to the German and Austrian markets in January 2011
    as one of the first proven and transportable intelligent lithium storage systems.
    The company is a pioneer in what is now a rapidly growing storage market
    and now has over 80 qualified employees. (homepage excerpt)

    Sentiment: Strong Sell

  • Reply to

    Sonnenbatterie

    by investors_liberation_movement May 11, 2015 6:27 PM
    investors_liberation_movement investors_liberation_movement May 11, 2015 7:42 PM Flag

    fyi: CBAK profile
    China BAK Battery, Inc., together with its subsidiaries, focuses on developing, manufacturing,
    and selling high-power lithium batteries in China and internationally.
    The company’'s products are used in various applications, including electric vehicles,
    such as electric cars, electric buses, hybrid electric cars, and buses; light electric vehicles,
    such as electric bicycles, electric motors, and sight-seeing cars; and electric tools, energy storage,
    uninterruptible power supply, and other high power applications.
    China BAK Battery, Inc. was founded in 2001 and is based in Dalian, People’s Republic of China

    Sentiment: Strong Sell

  • investors_liberation_movement investors_liberation_movement May 11, 2015 7:40 PM Flag

    Inverter Inefficiency (continued)
    Another important factor involves the wave form and inductive loads
    (i.e. an appliance where an electrical coil is involved, which will include anything with a motor).
    Any waveform that is not a true sine wave (i.e. is a square, or modified square wave) will be
    less efficient when powering inductive loads - the appliance may use 20% more power than
    it would if using a pure sine wave. Together with reducing efficiency, this extra power usage
    may damage, or shorten the life of the appliance, due to overheating.
    (Search Web "inverter efficiency" for more.)

    Sentiment: Sell

  • Reply to

    DC vs. AC

    by investors_liberation_movement May 7, 2015 11:27 AM
    investors_liberation_movement investors_liberation_movement May 11, 2015 7:36 PM Flag

    Search Web "Direct Current Appliances"
    NOTE especially "DC House" Realizing a cost-effective zero net energy building
    through direct current (DC) residential distribution Jul 29, 2011 by Satish Rajagopalan
    and Brian Fortenbery, EPRI | Electrical Construction and Maintenance
    (ecmwebdotcom/contractor/dc-house)

    Sentiment: Strong Sell

  • Reply to

    DC vs. AC

    by investors_liberation_movement May 7, 2015 8:20 AM
    investors_liberation_movement investors_liberation_movement May 11, 2015 6:33 PM Flag

    Search Web "Direct Current Appliances"
    NOTE especially "DC House" Realizing a cost-effective zero net energy building
    through direct current (DC) residential distribution Jul 29, 2011 by Satish Rajagopalan
    and Brian Fortenbery, EPRI | Electrical Construction and Maintenance
    (ecmwebdotcom/contractor/dc-house)

    Sentiment: Strong Sell

  • Reply to

    Sonnenbatterie

    by investors_liberation_movement May 4, 2015 4:33 PM
    investors_liberation_movement investors_liberation_movement May 11, 2015 6:30 PM Flag

    fyi: CBAK profile
    China BAK Battery, Inc., together with its subsidiaries, focuses on developing, manufacturing,
    and selling high-power lithium batteries in China and internationally.
    The company’s products are used in various applications, including electric vehicles,
    such as electric cars, electric buses, hybrid electric cars, and buses; light electric vehicles,
    such as electric bicycles, electric motors, and sight-seeing cars; and electric tools, energy storage,
    uninterruptible power supply, and other high power applications.
    China BAK Battery, Inc. was founded in 2001 and is based in Dalian, People’s Republic of China

    Sentiment: Strong Sell

  • investors_liberation_movement by investors_liberation_movement May 11, 2015 6:27 PM Flag

    is exclusively manufactured at the company's headquarters in Allgäu
    has also been TÜV certified since 2011.
    Sonnenbatterie GmbH consistently invests in research and development that also predominantly
    takes place at the company's Bavarian headquarters. The detailed data of several hundred systems,
    which have been evaluated using anonymous online monitoring since 2011,
    form the solid and realistic basis for the customized development of the Sonnenbatterie.
    In 2010 the practical feasibility of the first Sonnenbatterie were tested in several single-family homes
    under real world conditions. Once the fine-tuning based on these findings had been completed,
    the Sonnenbatterie was introduced to the German and Austrian markets in January 2011
    as one of the first proven and transportable intelligent lithium storage systems.
    The company is a pioneer in what is now a rapidly growing storage market
    and now has over 80 qualified employees. (homepage excerpt)

    Sentiment: Strong Sell

  • Reply to

    DC vs. AC

    by investors_liberation_movement May 6, 2015 11:18 AM
    investors_liberation_movement investors_liberation_movement May 11, 2015 6:21 PM Flag

    "DC transformer" Web Search shows there's no such thing.
    For a transformer to work, the current in one coil has to somehow make
    current flow in the other coil and the circuit it's connected to. A DC current
    in one coil will make a magnetic field on the other coil, but a magnetic field
    by itself won't drive any electrons around. A CHANGING magnetic field,
    however, does create an electric force which will accelerate those electrons
    in the other coil into carrying a current. This process is described by
    Faraday's law of induction. You get a changing field from an AC current,
    since the current which makes the field is changing.

    You're apparently referring to "DC-to-DC converters". (Wikipedia)
    Your response was intentionally misleading and electrically illiterate.

    Sentiment: Strong Sell

  • investors_liberation_movement by investors_liberation_movement May 11, 2015 5:54 PM Flag

    By efficiency, we are really saying, what percentage of the power that goes into the inverter
    comes out as usable AC current (nothing is ever 100% efficient, there will always be some
    losses in the system). This efficiency figure will vary according to how much power is being
    used at the time, with the efficiency generally being greater when more power is used.
    Efficiency may vary from something just over 50% when a trickle of power is being used,
    to something over 90% when the output is approaching the inverters rated output.
    An inverter will use some power from your batteries even when you are not drawing any
    AC power from it. This results in the low efficiencies at low power levels.
    A 3Kw inverter may typically draw around 20 watts from your batteries when no AC current
    is being used. It would then follow that if you are using 20 watts of AC power,
    the inverter will be drawing 40 watts from the batteries and the efficiency will only be 50%.
    A small 200W inverter may on the other hand only draw 25 watts from the battery to give
    an AC outpur of 20 watts, resulting in an efficiency of 80%.

    Larger inverters will generally have a facility that could be named a "Sleep Mode" to increase
    overall efficiency. This involves a sensor within the inverter sensing if AC power is required.
    If not, it will effectively switch the inverter off, continuing to sense if power is required.
    This can usually be adjusted to ensure that simply switching a small light on is sufficient to
    "turn the inverter on". This does of course mean that appliances cannot be left in "stand-by" mode,
    and it may be found that some appliances with timers (e.g. washing machine) reach a point in
    their cycle where they do not draw enough power to keep the inverter "switched on",
    unless something else, e.g. a light, is on at the same time.

    Sentiment: Sell

  • investors_liberation_movement by investors_liberation_movement May 11, 2015 9:58 AM Flag

    246,547 solar projects
    2,381 megawatts installed
    $5.45 avg cost/watt (under 10kW)
    NOTE: Above figures include non-CSI data
    last updated: May 6, 2015
    only 65 projects more than last week
    Avg cost/watt came down 1% in a month nevertheless
    suggesting new project costs are significantly lower.
    What can the matter be with but 34 weeks left in 2015?

    Sentiment: Strong Sell

  • Reply to

    DC vs. AC

    by investors_liberation_movement May 6, 2015 11:18 AM
    investors_liberation_movement investors_liberation_movement May 11, 2015 9:08 AM Flag

    The authors of "DC House" are electrical engineers whose vision
    that DC is the best answer appears to be already vindicated.

    A transformer is an electrical device that transfers energy between two or more circuits
    through electromagnetic induction. A varying current in the transformer's primary winding
    creates a varying magnetic flux in the core and a varying magnetic field impinging on the
    secondary winding. This varying magnetic field at the secondary induces a varying
    electromotive force (EMF) or voltage in the secondary winding. Making use of Faraday's Law
    in conjunction with high magnetic permeability core properties, transformers can thus be
    designed to efficiently change AC voltages from one voltage level to another within
    power networks.
    Transformers range in size from RF transformers less than a cubic centimetre in volume to
    units interconnecting the power grid weighing hundreds of tons. A wide range of transformer
    designs is encountered in electronic and electric power applications. Since the invention in
    1885 of the first constant potential transformer, transformers have become essential for the
    AC transmission, distribution, and utilization of electrical energy. (more at Wikipedia)

    Teach us about "step up and step down transformers for DC", Banshee!
    Explain why "electrical storage is very expensive and dangerous" and why
    "the average person does not care or have knowledge to maintain batteries".
    Only utilities "need distribution and remote generation" obviously.

    Sentiment: Strong Sell

  • investors_liberation_movement by investors_liberation_movement May 11, 2015 8:39 AM Flag

    246,547 solar projects
    2,381 megawatts installed
    $5.45 avg cost/watt (under 10kW)
    NOTE: Above figures include non-CSI data
    last updated: May 6, 2015
    only 65 projects more than last week
    Avg cost/watt came down 1% in a month nevertheless
    suggesting new project costs are significantly lower.
    What can the matter be with but 34 weeks left in 2015?

    Sentiment: Strong Sell

  • Reply to

    DC vs. AC

    by investors_liberation_movement May 10, 2015 2:49 PM
    investors_liberation_movement investors_liberation_movement May 11, 2015 8:35 AM Flag

    Disclosure: I have no position in SEDG nor in its competitors yet.

    Sentiment: Sell

  • Reply to

    DC vs. AC

    by investors_liberation_movement May 7, 2015 9:49 AM
    investors_liberation_movement investors_liberation_movement May 11, 2015 8:29 AM Flag

    Search Web "Direct Current Appliances"
    NOTE especially "DC House" Realizing a cost-effective zero net energy building
    through direct current (DC) residential distribution Jul 29, 2011 by Satish Rajagopalan
    and Brian Fortenbery, EPRI | Electrical Construction and Maintenance
    (ecmwebdotcom/contractor/dc-house)

    Sentiment: Strong Sell

  • investors_liberation_movement by investors_liberation_movement May 11, 2015 8:22 AM Flag

    is exclusively manufactured at the company's headquarters in Allgäu
    and has also been TÜV certified since 2011.
    Sonnenbatterie GmbH consistently invests in research and development that also predominantly
    takes place at the company's Bavarian headquarters. The detailed data of several hundred systems,
    which have been evaluated using anonymous online monitoring since 2011,
    form the solid and realistic basis for the customized development of the Sonnenbatterie.
    In 2010 the practical feasibility of the first Sonnenbatterie were tested in several single-family homes
    under real world conditions. Once the fine-tuning based on these findings had been completed,
    the Sonnenbatterie was introduced to the German and Austrian markets in January 2011
    as one of the first proven and transportable intelligent lithium storage systems.
    The company is a pioneer in what is now a rapidly growing storage market
    and now has over 80 qualified employees. (homepage excerpt)

    Sentiment: Strong Sell