Comments on: Photovoltaic systems using micro inverter ?

By: S.M.Hossainb

S.M.Hossainb — Fri, 23 Apr 2010 16:05:36 +0000

If I have an solar unit, how I shall get electricity with that, does it need more aparatus? Batery,circuit or any interter? Could you please help me to set up one unit?

By: shashi

shashi — Thu, 22 Apr 2010 09:10:31 +0000

what sort of help you exactly need?

By: k.saidareddy

k.saidareddy — Sat, 17 Apr 2010 07:07:14 +0000

can u help me set -up for a small unit on my roof that can give 1kw or 500w

By: Dhiman

Dhiman — Fri, 09 Apr 2010 12:29:07 +0000

Can you help me set-up a small PV unit on my roof that can give me 650Watts or 150 VA power.

By: Francois

Francois — Fri, 02 Apr 2010 14:34:41 +0000

Hello Erlend,
do you any contracting particular experience in installing that type of PV system ? or your comment refers to design know how?
thanks to to tell us

By: Erlend

Erlend — Thu, 25 Mar 2010 10:27:07 +0000

I would think that no well-designed PV system is designet with only one large inverter, as described here. Everyone whos involved in designing systems like this, know that one have to take account of shadows, by installing several smaller inverters. One inverter per module seem expensive.

By: Dikran

Dikran — Thu, 25 Mar 2010 07:24:52 +0000

Guys,
Anybody has a design guide for PV systems, from A to Z.
If anybody can send me some useful documentation: mrdiko@hotmail.com
Regards.

By: Yves JEANJEAN

Yves JEANJEAN — Mon, 08 Mar 2010 13:44:44 +0000

The PV cells (5′ or 6′) are connected in serial inside a module and the modules are also connected in serial to obtain a string. If a cell is shading:
• Without bypass diode, you will limit the current for all the string and the yield harvest will divide by 10 or in the worst scenario, the cell becomes a receptor, heats up to a hot spot and destroys itself. In this case, you open the serial line and the PV production stop.
• With bypass diode, you will bypass the group where the cell is shading (i.e. 18 cells) and protect the rest of the string. You slash a small part of your string to preserve the rest of your yield harvest.
It’s wrong to say the bypass diode improves the efficiency, but we can say that the bypass diode optimizes the possible yield harvest in case of partial shadow or fault on the string.

By: Rajnish sharma

Rajnish sharma — Thu, 04 Mar 2010 10:18:15 +0000

Why diode is connect with PV module and how it will connect.IS it will improve the efficiecy of solar system if yes then How

By: Rajnish sharma

Rajnish sharma — Thu, 04 Mar 2010 10:14:42 +0000

Why diode is connect with PV module