Good morning

I am currently running 1 x Luxpower SNA6000, 1 x Hina 14.3kw Powergem Battery and 6 x Longi 555W panels on a single string. Due to my energy usage, I have bought 2 more identical panels to up my production.

Is it better to add all 8 panels on to a single string (panels are rated at 49V open circuit, in practice the 6 string setup runs at between 220V and 240V) and to bridge the MPPTs, or should I run 2 x strings of four panels per MPPT?

Also, does anyone have experience with bridging the MPPT's, and advise in this regards?

Thank you in advance.

Edited September 29, 2025Sep 29 by AppleJack
Correction on voltage range

@AppleJack ,

Seems your inverter's MPPT spec is 120 - 385 Volts. That means the max amount of panels (for optimum operation) = 385V/49V = 7.85 = 8 panels.

As your inverter's maximum PV input is 480V, that would allow sufficient cover for extra cold mornings (less than 0 deg C).

Some Inverter manufacturers specify/prefer that the PV source be "balanced" between the MPPT's, if so with yours, then split 4 + 4.

Personally I would go for a 1 x 8 setup, seeing that 8 x 555 = 4440W, only 10% above the rated capacity of the MPPT, which should cater well for all the losses etc. in the string.

Then you can plan your 2nd string at your leisure.

In theory, a 1 x 8 string will also "wake up" earlier in the morning, as it gets to the 100V MPPT threshold quicker that a 1 x 4 setup, but I think that much of a muchness.

7 minutes ago, Sidewinder said:

@AppleJack ,

Seems your inverter's MPPT spec is 120 - 385 Volts. That means the max amount of panels (for optimum operation) = 385V/49V = 7.85 = 8 panels.

As your inverter's maximum PV input is 480V, that would allow sufficient cover for extra cold mornings (less than 0 deg C).

Some Inverter manufacturers specify/prefer that the PV source be "balanced" between the MPPT's, if so with yours, then split 4 + 4.

Personally I would go for a 1 x 8 setup, seeing that 8 x 555 = 4440W, only 10% above the rated capacity of the MPPT, which should cater well for all the losses etc. in the string.

Then you can plan your 2nd string at your leisure.

In theory, a 1 x 8 string will also "wake up" earlier in the morning, as it gets to the 100V MPPT threshold quicker that a 1 x 4 setup, but I think that much of a muchness.

Thank you for this, feeling much better about it. My inverter's manual says I can bridge out the MPPT's to combine the input - do you think this is a good idea, or do I just stick to 1 x MPPT and clip the extra 10% as an when?

Edited September 29, 2025Sep 29 by AppleJack
Spelling

1 hour ago, AppleJack said:

Thank you for this, feeling much better about it. My inverter's manual says I can bridge out the MPPT's to combine the input - do you think this is a good idea, or do I just stick to 1 x MPPT and clip the extra 10% as an when?

The sna6000 firmware update pushes it to 4800w per mppt

If you want u can bridge it, remember to change it on the inverter software too

4 minutes ago, Stefan Cornelissen said:

The sna6000 firmware update pushes it to 4800w per mppt

If you want u can bridge it, remember to change it on the inverter software too

I was not aware of that, thank you!

Do you perhaps know what the latest firmware version is? My current version is cbaa-1A221F

3 hours ago, AppleJack said:

I was not aware of that, thank you!

Do you perhaps know what the latest firmware version is? My current version is cbaa-1A221F

cBaa-318D96 for my side but

Hi Guys

Thank you for your help with this. I have installed my 2 x new panels, and everything is humming along nicely.

Earlier today I got a spike of over 5kw on the PV1 circuit (i suspect it was cloud lensing), and now I am worried about popping the mppt. Seeing as though I do not have a 2nd string, I see no harm in bridging the 2 mppts.

The user manual explains the setting, but not how to wire the panel in order to bridge the 2 x mppts. Please would you help me here?

Edited October 5, 2025Oct 5 by AppleJack
spelling

1 hour ago, AppleJack said:

Hi Guys

Thank you for your help with this. I have installed my 2 x new panels, and everything is humming along nicely.

Earlier today I got a spike of over 5kw on the PV1 circuit (i suspect it was cloud lensing), and now I am worried about popping the mppt. Seeing as though I do not have a 2nd string, I see no harm in bridging the 2 mppts.

The user manual explains the setting, but not how to wire the panel in order to bridge the 2 x mppts. Please would you help me here?

Just a cable from the one side + to other + and same for the - side.

The best would probably be using a splitter on the cables. Not a big fan of 2 cables going into one connector plate but its possible

Edited October 5, 2025Oct 5 by Stefan Cornelissen

On 2025/10/05 at 4:00 PM, Stefan Cornelissen said:

Just a cable from the one side + to other + and same for the - side.

The best would probably be using a splitter on the cables. Not a big fan of 2 cables going into one connector plate but its possible

MPPTs have been bridged and everything is ticking over beautifully, thank you so much!

Edited October 7, 2025Oct 7 by AppleJack
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