Growatt SPF 500 ES microgrid with Ecoflow DeltaPro

[dstoian]

Hi guys,

I'm owning 2 x DeltaPro EU version.
They are working fine as backup and main power for my house:
- I'm daisy chaining them
- both have 1.2KW PV arrays attached
- second DeltaPro AC-out is connected to my house transfer switch

But there are some drawbacks:
1. Solar PV charging is limited for my needs
2. Daisy chaining is not optimal
3. I would like a cheaper inverter to do the hard work in the front line

I'm wondering if it's possible to create a microgrid with Growatt SPF 500 ES:
- DeltaPro AC-out connected to Growatt AC-in as Utility
- Growatt AC-out conneted to my house transwer switch
- Growatt set in "SUB" mode
In this way Growatt will deliver from his own PV + from DeltaPro charged from his own PV.

Some people have pointed that Growatt is acting like an on-grid inverter with injection limitation.
This injection limitation will "spill" current in DP when big consumers are disconnecting.

So big dilema is:
- will this microgrid work ?
- what will happen if Growatt spills current in DP AC-out ?
- will it hurt DP ? DP has protection on AC-out for incoming current ?

Thank you.

 

[dstoian]

I found answers in another thread : https://diysolarforum.com/threads/h...ging-and-running-apliances.35282/#post-544244