can i use a grid tie inverter as an off grid inverter

[placez]

these two are for sale​

Yeah i know its a stupid question​

Growatt PV Grid-Tie Inverter 3600W​

SolarEdge 5000W​

 

[davewsail]

Short answer-- no. Longer answer is it depends on what else you plan for your system. If you also plan on adding an AIO for battery connection, then maybe. I am upgrading my grid tie system to be off grid with grid backup. The SRNE AIOs I bought allow hooking grid tied inverters to the GEN input and thus grid doesn't need to be up to use them. I'm doing this because I already have a grid-tied system. But if you are buying something new, just build an off-grid system.

 

[placez]

someone is selling them for cheap and i wanted to use them cause they have high solar input

 

[SplitUniverse]

you can use them in conjunction with another inverter that can do "off grid".
Basically you want something that can AC couple with them and provide the "grid". A LOT of AIO units are capable of that or you can use a XW Pro currently on sale at NAZ.

Another option would be if they have an option for "off grid" in the software but I'm not familiar with the units.

 

[kommando]

They are cheap until you add the cost of a Grid forming inverter and then sort out how the grid forming inverter controls their output when the house load is satisfied and the batteries are full.

 

[frankrudis65]

Hi there, as SplitUniverse said,you might be able to put with another off grid inverter together,if the software allows you can run them into back-up mode which depends on the software but is not really an complete off grid situation(there might be even some power restriction on the back-up mode).I am running completely off grid and I've chosen an inverter which has been designed for off grid-even if now accept to be connected to the grid- in that way the system is running sufficiently without any surprises....Having more components in a system,as necessary is not really advisable....Best regards Frank