EG4 / Fronius Primo / Gen25 / other??? for (2) Franklinwh Batteries and 15kw of panels

[ahreno]

Maybe i'll have a more productive thread here than in general. trying to figure out an inverter for a system i'm putting together.

Have:
(30) Longi Hi Mo 5 panels. (415w up to 550w bifacial). ( owned but not installed, i dont NEED to use all 30)
(2) FranklinWH Batteries
(1) Franklin aGate
Franklin generator charger thing.

Need:

Affordable grid tie inverter to feed 240 into the aGate to keep batteries charged, so i use as little power from the grid as possible.

I seem to keep landing on either a EG4 18kpV, a Fronius Primo 15kw or the newer Primo Gen24 (i think i'd need to utilize two of these though but not sure which sizes)

Anyone care to chime in on these choices or a more affordable alternative i should consider? Perhaps something by Growatt? Price is a concern of course, but i dont want to buy junk I'll regret either.

 

[BentleyJ]

I mentioned Fronius Primo in the other post. Our original Solar City System installed in 2011 has a Fronius IG Plus. Still working perfectly. I've only had to replace the main fan a while back. Only because it was getting noisy but had not failed yet.

Good news: Fronius does have spare parts and a Service Center in the US and I actually spoke to a real human. Bad News: They would not sell me parts directly.


Work around: This is an independent service center and he did sell me a fan which I installed. https://www.froniusinverterrepair.com/
Interestingly enough once I got the unit apart and removed fan and the rubber duct around the fan it turns out the fan is basically generic and could have sourced from a number of places.

Bottom Line, IMO. Fronius would be a good choice for your application.

 

[Quattrohead]

You will need RSD on the panels.
You can use APSmart or Tigo directly with the EG4 18Kpv.
For the Fronius, they have a bigger RSD box that lives with the panels, however it only seems code compliant upto 2017.
Enphase are good, but you are going to clip output, that's the problem of buying parts before you have a design.
Friends don't let random interwebs people use Solaredge.

 

[ahreno]

You will need RSD on the panels.
You can use APSmart or Tigo directly with the EG4 18Kpv.
For the Fronius, they have a bigger RSD box that lives with the panels, however it only seems code compliant upto 2017.
Enphase are good, but you are going to clip output, that's the problem of buying parts before you have a design.
Friends don't let random interwebs people use Solaredge.

does that mean there isn't an RSD for the fronius that will pass current code?

 

[BentleyJ]

does that mean there isn't an RSD for the fronius that will pass current code?

Don't confuse Anti-Islanding (inverter shuts down in an outage) with Rapid Shutdown modules on the panels themselves. The code requires that the DC String voltage must be reduced to 30V or less within 30 seconds of a power outage.

This is one of the main reasons microinverters are so popular. They take care of both Shutdown operations at the PV panels instead of having to purchase individual RSD modules for each panel AND a String inverter.

 

[ahreno]

Don't confuse Anti-Islanding (inverter shuts down in an outage) with Rapid Shutdown modules on the panels themselves. The code requires that the DC String voltage must be reduced to 30V or less within 30 seconds of a power outage.

This is one of the main reasons microinverters are so popular. They take care of both Shutdown operations at the PV panels instead of having to purchase individual RSD modules for each panel AND a String inverter.

this has me confused. I'm going to need an ~$35 RSD on each panel?

 

[BentleyJ]

PV wiring outside the 1 foot PV array boundary must be reduced to 30V or less in 30 Sec. The most common way to comply is by using RSD's on each panel. The alternative would be mount a small weather proof box near the last panel and install a DC Relay or Contactor connected to a rapid shutdown system that disconnects the whole array.

 

[ahreno]

PV wiring outside the 1 foot PV array boundary must be reduced to 30V or less in 30 Sec. The most common way to comply is by using RSD's on each panel. The alternative would be mount a small weather proof box near the last panel and install a DC Relay or Contactor connected to a rapid shutdown system that disconnects the whole array.

do i need RSD even on ground mount? i dont think i do?

 

[ahreno]

You will need RSD on the panels.
You can use APSmart or Tigo directly with the EG4 18Kpv.
For the Fronius, they have a bigger RSD box that lives with the panels, however it only seems code compliant upto 2017.
Enphase are good, but you are going to clip output, that's the problem of buying parts before you have a design.
Friends don't let random interwebs people use Solaredge.

RSD even on ground mount?

 

[going_commando]

Nope, you don't need RSD on a ground mount, only on roof mount or on a structure whose main purpose isn't to hold solar panels.

 

[Quattrohead]

How many more times are you going to dribble necessary info ?
Get a professional involved, not a bunch of randoms on the interwebs.
DONE.

 

[ahreno]

How many more times are you going to dribble necessary info ?
Get a professional involved, not a bunch of randoms on the interwebs.
DONE.

what? i'm just trying to talk about the damn inverter, my mounting location should not affect the actual inverter. you're the one that made the assumption and started talking about RSD's. i never brought them up as the installer never mentioned needing them since they aren't needed. I'm sorry you made an incorrect assumption but thats not on me.