Jump to content

Solar panel power


Recommended Posts


i would like to get some advice on solar panel power , I have two inverters , grid tie inverter and a off grid inverter , i will put 18 panels x 330w to my grid tie inverter , my off grid has no panels at this moment , I have a victron charge control for future panel installation of panels for off grid inverter , what i need to find out is it possible to change over my solar panels from my grid tie inverter to my off grid inverter when there is no city power , If someone can recommend which change over switch or which  contactors I can use to change the solar panels from grid tie inverter to off grid inverter when there is load shedding , please advice if possible 


Link to comment
Share on other sites

Hi Kiranbhowan

You need a DC contactor or a DC change over switch - both of which are more expensive than their AC counterparts. There is usually a magnet which deflects the ensuing spark when switched into a catch cage.  ABB make a DC rated contactor.  If you cannot get a DC contactor you can make a very good snuffing circuit by placing a large enough capacitor across the terminals of the contactor. While the contactor is closed the potential difference across the  terminals is zero. As the contactor opens  there is a potential difference  and the capacitor starts charging.  I am not sure your local authority would accept a contactor/capacitor combination.  Your capacitor  needs to have a voltage rating higher than your PV strings. There are some good videos on Youtube. Here is one.

I cannot find the one I was looking for. This pommie's demonstration is good but health and safety would have a field day 😁 

Edited by Chris Hobson
Link to comment
Share on other sites

Good morning . I am running a
Mercer sol-I-ax-5p hybrid inverter with 6 energia panels polycrystalline and 2 PYlontech lithium iron batteries US3000.
I am running  the following program settings

1: SBU
2: 60A
3 and 4, leave as default
5: select USER for battery type
6 to 9, leave as default
11: 60A
12: 48V
13: 51V
16: SNU
18 to 22,  on default.
23: BYE
25: default.
26: 53.2V
27: Default
29: 47.5V
31 to 38  on default.



I have this error appearing on the photo attached . The fault light is flickering. May you kindly assist


Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...