High power SMPS 2kw 400v DC

Dizipia · 7th March 2011, 05:51 AM

Hi I am looking for a smps that can produce upto 2kw and 400 volts DC.
Can anyone please point me to were I can source these types of smps's, what they are properly identified as and what they may cost.
I wish to connect it to a grid connect solar PV system.
I thought it would be a good way to "extend" the day light ours of use by my panels, giving me a better return from the state electical wholesale supplier as I receive a greater payback for electricity i put in the grid verses what it costs me to run the smps.
I was planning to run the smps 2-3 hrs befor and after normal daylight operations.
Does anyone have any suggestions if the think there could be any negative issues with the panels.
Your idea's and advice will be appreciated.
Cheers, Dizipia

mastodon · 7th March 2011, 03:04 PM

Huh? I don't get it. You need an smps that outputs 400Vdc @ 2kW? What is the input going to be? And what are you going to feed those 400Vdc to?

kubeek · 7th March 2011, 07:23 PM

Do you mean simulating output of PV panels with diesel generator and smps?

luka · 8th March 2011, 08:23 AM

sounds like some sort of DC to DC, depends on what will be input voltage

Dizipia · 8th March 2011, 09:45 AM

I will be using 240 volts AC to run the smps. I am trying to "simulate" additional panels or "more" sun light hours.
If you can understand my meaning.
Thanks

mastodon · 8th March 2011, 03:17 PM

Yeah, I get it. And use a diesel gen to get 240Vac? How is the power fed back to the powerco, as 400Vdc over a special line, or through the regular 240Vac net? If the latter, then you don't need the whole smps, do you?

In any case, you don't necessarily need an smps. A linear power supply consisting of a 240V:300V transformer, a bridge rectifier and maybe a huge electrolytic will probably do just fine. A couple of diodes could prevent any damage to the panels, but the exact protection requirements depend on the auxiliary electronics for the panels.

I'm not aware of a commercial source for 240Vac - 400Vdc @ 2kW smps that sells to individuals. It's not something you come across on a daily basis in the market place.

luka · 8th March 2011, 09:09 PM

240AC, 400Vdc... check power PFC units, I'm sure you will be able to find 2kw unit easy

7th March 2011, 05:51 AM	#1
Dizipia diyAudio Member Join Date: Mar 2011	High power SMPS 2kw 400v DC Hi I am looking for a smps that can produce upto 2kw and 400 volts DC. Can anyone please point me to were I can source these types of smps's, what they are properly identified as and what they may cost. I wish to connect it to a grid connect solar PV system. I thought it would be a good way to "extend" the day light ours of use by my panels, giving me a better return from the state electical wholesale supplier as I receive a greater payback for electricity i put in the grid verses what it costs me to run the smps. I was planning to run the smps 2-3 hrs befor and after normal daylight operations. Does anyone have any suggestions if the think there could be any negative issues with the panels. Your idea's and advice will be appreciated. Cheers, Dizipia

8th March 2011, 08:23 AM	#4
luka diyAudio Member Join Date: Sep 2005 Location: in Slovenia :)	sounds like some sort of DC to DC, depends on what will be input voltage __________________ home page @ http://www.classdaudio.co.cc @ 24/7 all year long I FEEL SLOVENIA

8th March 2011, 09:09 PM	#7
luka diyAudio Member Join Date: Sep 2005 Location: in Slovenia :)	240AC, 400Vdc... check power PFC units, I'm sure you will be able to find 2kw unit easy __________________ home page @ http://www.classdaudio.co.cc @ 24/7 all year long I FEEL SLOVENIA

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7th March 2011, 03:04 PM	#2
mastodon diyAudio Member Join Date: Jan 2011	Huh? I don't get it. You need an smps that outputs 400Vdc @ 2kW? What is the input going to be? And what are you going to feed those 400Vdc to?

7th March 2011, 07:23 PM	#3
kubeek diyAudio Member Join Date: Dec 2005 Location: Prague, Czech Rep	Do you mean simulating output of PV panels with diesel generator and smps?

8th March 2011, 09:45 AM	#5
Dizipia diyAudio Member Join Date: Mar 2011	I will be using 240 volts AC to run the smps. I am trying to "simulate" additional panels or "more" sun light hours. If you can understand my meaning. Thanks

8th March 2011, 03:17 PM	#6
mastodon diyAudio Member Join Date: Jan 2011	Yeah, I get it. And use a diesel gen to get 240Vac? How is the power fed back to the powerco, as 400Vdc over a special line, or through the regular 240Vac net? If the latter, then you don't need the whole smps, do you? In any case, you don't necessarily need an smps. A linear power supply consisting of a 240V:300V transformer, a bridge rectifier and maybe a huge electrolytic will probably do just fine. A couple of diodes could prevent any damage to the panels, but the exact protection requirements depend on the auxiliary electronics for the panels. I'm not aware of a commercial source for 240Vac - 400Vdc @ 2kW smps that sells to individuals. It's not something you come across on a daily basis in the market place.

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