Forums
New posts
Search forums
What's new
New posts
New media
New media comments
Latest activity
Media
New media
New comments
Search media
Members
Current visitors
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Green Renewable Energy Forum
Solar PV Forum
More about AC coupled vs DC coupled system
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support Talk Electrician Forum:
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="Ronski" data-source="post: 549842" data-attributes="member: 26649"><p>DC coupled batteries are more efficient, therefore less loses. In a DC system such as the Victron system, current flows from the panels through the MPPT to the batteries, apart from the MPPT dropping the voltage down there is no conversion, so it is more efficient.</p><p></p><p>The batteries are normally connected to a busbars, the MPPT controlers connect to the same busbars, and the inverter connects to the same busbars as well.</p><p></p><p>My system has a SolarEdge inverter as well, because I have whole house backup the Victron inverter has to be able to control the SE inverter. If the grid is disconnected and the batteries are full the Victron system will slow down production to match loads, but the SE inverter sees a grid so carries on at full power, but there's nowhere for the power to go. So what the Victron does once setup, is change the frequency, and this stop the SE inverter generating, as it see's an out of spec frequency. New ones will actually de-rate as the frequency increases. If you're staying grid tied without backup there's no need to worry about this as both system will shut down on grid loss.</p><p></p><p>There's a lot to learn, and a lot to get you're head around.</p></blockquote><p></p>
[QUOTE="Ronski, post: 549842, member: 26649"] DC coupled batteries are more efficient, therefore less loses. In a DC system such as the Victron system, current flows from the panels through the MPPT to the batteries, apart from the MPPT dropping the voltage down there is no conversion, so it is more efficient. The batteries are normally connected to a busbars, the MPPT controlers connect to the same busbars, and the inverter connects to the same busbars as well. My system has a SolarEdge inverter as well, because I have whole house backup the Victron inverter has to be able to control the SE inverter. If the grid is disconnected and the batteries are full the Victron system will slow down production to match loads, but the SE inverter sees a grid so carries on at full power, but there's nowhere for the power to go. So what the Victron does once setup, is change the frequency, and this stop the SE inverter generating, as it see's an out of spec frequency. New ones will actually de-rate as the frequency increases. If you're staying grid tied without backup there's no need to worry about this as both system will shut down on grid loss. There's a lot to learn, and a lot to get you're head around. [/QUOTE]
Insert quotes…
Verification
Post reply
Green Renewable Energy Forum
Solar PV Forum
More about AC coupled vs DC coupled system
Top