Hi, I have had Solar since 2018. I found a good deal on a second inverter and would like to use some stimulus money to upgrade. My installer has gone out of business so I am looking at doing a lot of this myself. I have the following:
Fronius Primo 6.0
22 - 345w Panels
MPPT1 - 12 - 4140w
MPPT2 - 10 - 3450w
Total - 7590w
I clip in the spring quite a bit. I have room on my Pergola to mount 6 panels in Portrait. Trying to come up with the best configuration. My plan would be to reconfigure the strings to keep panels that are close to each other on their own string. My thought was the following:
Fronius Primo 6.0 - Inverter 1
13 - 345w Panels
MPPT1 - 2415w (existing)
MPPT2 - 2070w (existing)
Total - 4485w
Fronius Primo 6.0 - Inverter 2
7 - 345w Panels
6 - 395w Panels
MPPT1 - 2415w (existing)
MPPT2 - 2370w (new)
Total - 4785w
Grand Total - 9270w
I was talking to someone online that supposedly knows solar and they told me that it is not a good idea to mix wattage even if they are on their own strings. He is saying I should stick with 345w across both MPPT. He said that it could cause premature inverter failure. Is this accurate advise? I want to get the most out of the space I have but don't want to cause problems for myself.
Next question is the solar disconnect. I was thinking the best way to wire this would be to replace my 30amp disconnect with a 60 along with replacing the wire to the panel with appropriate gauge wire and 60 amp in the main panel. Then run each inverter to small 60 amp sub panel with each inverter having a 30amp breaker and the sub panel connected to the disconnect. Does this sound correct or should I have a disconnect for each inverter?
Any suggestions for racking on top of a Pergola? I was hoping to have something I can change the angle but I don't want to break the bank.
Thanks for the help!
Fronius Primo 6.0
22 - 345w Panels
MPPT1 - 12 - 4140w
MPPT2 - 10 - 3450w
Total - 7590w
I clip in the spring quite a bit. I have room on my Pergola to mount 6 panels in Portrait. Trying to come up with the best configuration. My plan would be to reconfigure the strings to keep panels that are close to each other on their own string. My thought was the following:
Fronius Primo 6.0 - Inverter 1
13 - 345w Panels
MPPT1 - 2415w (existing)
MPPT2 - 2070w (existing)
Total - 4485w
Fronius Primo 6.0 - Inverter 2
7 - 345w Panels
6 - 395w Panels
MPPT1 - 2415w (existing)
MPPT2 - 2370w (new)
Total - 4785w
Grand Total - 9270w
I was talking to someone online that supposedly knows solar and they told me that it is not a good idea to mix wattage even if they are on their own strings. He is saying I should stick with 345w across both MPPT. He said that it could cause premature inverter failure. Is this accurate advise? I want to get the most out of the space I have but don't want to cause problems for myself.
Next question is the solar disconnect. I was thinking the best way to wire this would be to replace my 30amp disconnect with a 60 along with replacing the wire to the panel with appropriate gauge wire and 60 amp in the main panel. Then run each inverter to small 60 amp sub panel with each inverter having a 30amp breaker and the sub panel connected to the disconnect. Does this sound correct or should I have a disconnect for each inverter?
Any suggestions for racking on top of a Pergola? I was hoping to have something I can change the angle but I don't want to break the bank.
Thanks for the help!
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