Growatt SPF 1000 DVM parallel

[magnet creek]

Hi,

I have two Growatt SPF 10000 DVM split phase off grid inverters that I want to install in parallel. They are connected to 7.5 kW of solar and 2 200 Ah Batteries.
One inverter is capable of powering all the loads, but we're running a 3HP pump sometimes and that puts a lot of strain on the inverter and I do have a spare inverter so I thought I'd reduce the load.

I cannot seem to find any documentation on how to run these inverters in parallel and what comm's cable is needed and if any of the settings need to be changed. The manual has a small note that the units can be installed in parallel but no information on how to do this.
These units were part of a delivery of other materials in China (long story) so I have no access to after sales whatsoever and Growatt US's customer service is virtually non-existent.

Does anybody have any experience in setting these up in parallel or can point to documentation that is usefull?

 

[timselectric]

Growatt SPF 10000 DVM

I can't find anything on SPF 1000 DVM.
Are you sure it's not a SPF 1000T DVM ?

If it's the "T" , it can not be paralleled.

 

[magnet creek]

Hi Tim,

It is a SPF 1000T DVM indeed. Maybe that explains why I had difficulties . There is a refernce in the user manual on parallel setting , but maybe that is just a copy past from a different manual.

 

[timselectric]

Hi Tim,

It is a SPF 1000T DVM indeed. Maybe that explains why I had difficulties . There is a refernce in the user manual on parallel setting , but maybe that is just a copy past from a different manual.
View attachment 249985

Yes, that appears to be a typo.
Or just bad chinglish.
I think that it's referring to bypass mode as "parallel".
Because this would cause a short if connected in reverse polarity. (Which really isn't polarity)