Sethtrosity
New Member
- Joined
- Feb 22, 2022
- Messages
- 36
Hello,
I am looking for some advice on a system I have in mind and have a few questions.
The system: Growatt 5000ES (US Model) + 10 250W panels (37.6 Voc, 30.3 Vmp) from santansolar.
I will only be powering 240v loads, using the solar / grid mode for now.
I plan on adding more panels in parallel in the future (10 more).
I would eventually have two sets of 10 in series, linked in parallel.
Growatt 5000 taking input from PV and Grid (PV as priority)
The inverter will then feed a sub panel where my 240V loads will be.
50A Breaker from Main panel to Inverter input.
Inverter output to 50A Breaker on sub panel.
1. Do I need to worry about back-feed into the grid? The 5000ES isn't a grid-tied unit, only uses the grid for input, so I assume no.
2. Should I have a DC breaker on the PV lines coming in before connecting to the inverter? If so, what is the proper sizing or rating I should use?
3. Should I have a PV Quick Disconnect? If so, what is the proper sizing or rating I should use.
I understand that when adding panels in parallel, I should use a combiner box.
I'm just not sure if I need a specific one since the MPPT can handle up to 450 VDC.
Also, if I were to add a DC breaker in-between the PV and Inverter, I'm not sure how to size it.
This would be for protecting the inverter in case over-current happens for some reason.
I have seen the videos on the bond issues, which I made sure to get the US model.
I have also seen the videos on using the transformer to run 110V loads, which I'm not comfortable with.
Any advice is welcomed, thanks!
I am looking for some advice on a system I have in mind and have a few questions.
The system: Growatt 5000ES (US Model) + 10 250W panels (37.6 Voc, 30.3 Vmp) from santansolar.
I will only be powering 240v loads, using the solar / grid mode for now.
I plan on adding more panels in parallel in the future (10 more).
I would eventually have two sets of 10 in series, linked in parallel.
Growatt 5000 taking input from PV and Grid (PV as priority)
The inverter will then feed a sub panel where my 240V loads will be.
50A Breaker from Main panel to Inverter input.
Inverter output to 50A Breaker on sub panel.
1. Do I need to worry about back-feed into the grid? The 5000ES isn't a grid-tied unit, only uses the grid for input, so I assume no.
2. Should I have a DC breaker on the PV lines coming in before connecting to the inverter? If so, what is the proper sizing or rating I should use?
3. Should I have a PV Quick Disconnect? If so, what is the proper sizing or rating I should use.
I understand that when adding panels in parallel, I should use a combiner box.
I'm just not sure if I need a specific one since the MPPT can handle up to 450 VDC.
Also, if I were to add a DC breaker in-between the PV and Inverter, I'm not sure how to size it.
This would be for protecting the inverter in case over-current happens for some reason.
I have seen the videos on the bond issues, which I made sure to get the US model.
I have also seen the videos on using the transformer to run 110V loads, which I'm not comfortable with.
Any advice is welcomed, thanks!