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  #31 (permalink)  
Old 27th July 2014, 08:49 AM
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Most people have batteries that store energy........that's the whole reason for having solar, so you don't have to depend on the power company. you have your own power, independent of exterior source, for as long as your batteries last. Of course, if you are tied to the power grid with NO batteries, then the energy you generate from solar will just lower your consumption during the day, while at night you continue consumption through local power company.

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  #32 (permalink)  
Old 27th July 2014, 03:56 PM
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Originally Posted by George6020 View Post
Most people have batteries that store energy........that's the whole reason for having solar, so you don't have to depend on the power company. you have your own power, independent of exterior source, for as long as your batteries last. Of course, if you are tied to the power grid with NO batteries, then the energy you generate from solar will just lower your consumption during the day, while at night you continue consumption through local power company.
The companies (one was Matec) I've spoken with in Manila all only have or push the grid type (no batteries) solar energy systems. From what I'm told when there is a brownout, the grid shuts down and to protect their workers, so will your inverter, thus no solar power available. Also, can anyone with solar energy confirm they've received credit for their excess energy from Meralco?

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  #33 (permalink)  
Old 27th July 2014, 10:50 PM
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Originally Posted by geandc View Post
The companies (one was Matec) I've spoken with in Manila all only have or push the grid type (no batteries) solar energy systems. From what I'm told when there is a brownout, the grid shuts down and to protect their workers, so will your inverter, thus no solar power available. Also, can anyone with solar energy confirm they've received credit for their excess energy from Meralco?
If that's they way their system is connected, then its connected incorrectly, because the inverter is powered by the DC generated by the solar panels. Proper connections will include a Disconnect also, possibly automatic...........thus to protect ANY back feed on Meralco lines.

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  #34 (permalink)  
Old 28th July 2014, 06:28 PM
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If that's they way their system is connected, then its connected incorrectly, because the inverter is powered by the DC generated by the solar panels. Proper connections will include a Disconnect also, possibly automatic...........thus to protect ANY back feed on Meralco lines.
As far as I'm aware all systems that back feed the grid do not have batteries and turn off if the grid goes down for safety and to protect the inverter. I know mine does this.

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Old 28th July 2014, 11:03 PM
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It appears systems like these/yours ONLY lower the consumption during the day, and ONLY operate when the grid is energized. These systems don't give you the best savings for your investment. Its much better to have the option of using your solar power even during brownouts. Even better is to have deep cycle batteries.
Peak loads are during the daytime for power companies, which could be the reason your system would function only during the daytime. Many small businesses also operate during daytime hours, which makes this design popular too.
Unfortunately, you won't get maximum savings from your investment, nor will you have emergency power during brownouts or at night.

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Old 29th July 2014, 06:40 AM
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Originally Posted by George6020 View Post
It appears systems like these/yours ONLY lower the consumption during the day, and ONLY operate when the grid is energized. These systems don't give you the best savings for your investment. Its much better to have the option of using your solar power even during brownouts. Even better is to have deep cycle batteries.
Peak loads are during the daytime for power companies, which could be the reason your system would function only during the daytime. Many small businesses also operate during daytime hours, which makes this design popular too.
Unfortunately, you won't get maximum savings from your investment, nor will you have emergency power during brownouts or at night.
I use the grid as my battery, put excess power back on to the grid which winds my meter in reverse and pull it back when the sun goes in. It means I don't have to pay for a system to cover peaks and not be used most of the time.

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  #37 (permalink)  
Old 29th July 2014, 06:59 AM
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I use the grid as my battery, put excess power back on to the grid which winds my meter in reverse and pull it back when the sun goes in. It means I don't have to pay for a system to cover peaks and not be used most of the time.
If you have an agreement with the power company to feed back excess power from your solar panels, that's a nice benefit, but I've not heard of anyone in the Philippines having that agreement.

Philippines has 1 of the highest kwh rates in ALL of Asia, called price gouging in the US. I doubt the government can do anything about it either.

Next year, I plan to install a solar power system for my house, but I will include the options for continuous power during brownouts and nighttime.

Solar power systems are still expensive and take 15-20 years to recap your investment, depending on your load. But for me, I just want the convenience of having power when I need it.

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  #38 (permalink)  
Old 29th July 2014, 08:06 AM
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Originally Posted by geandc View Post
This sounds good, but from what I've read the solar power systems still need some source of external electrical power to run, so if you're home power goes out (brownout) then your solar power system goes out as well.
Solar systems can be completely self contained.
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