Good day.

 

The inverter takes what it needs from panels. So its rated at 4000 watt pv and said do no exceed. But why then can u add panels to have more. I have 3900 watts total panels most i have seen is about 2300 watt. Panels dont deliver 100%. so can i add. I have 3 sets off 3 in serries 430 watt that is 1290 per serries and multiply by 3 3870. Max used on inverter 2200 that i have seen. I want to add 2 more rows off 3. Can i do it, how will this affect the max 4000watt of inverter.

 

Thank U

15 minutes ago, JacoBusa said:

Good day.

 

The inverter takes what it needs from panels. So its rated at 4000 watt pv and said do no exceed. But why then can u add panels to have more. I have 3900 watts total panels most i have seen is about 2300 watt. Panels dont deliver 100%. so can i add. I have 3 sets off 3 in serries 430 watt that is 1290 per serries and multiply by 3 3870. Max used on inverter 2200 that i have seen. I want to add 2 more rows off 3. Can i do it, how will this affect the max 4000watt of inverter.

 

Thank U

What inverter do you have.What is your mppt operating range. Normal practice is not to exceed max pv by more than 20%.

meccer expert 5000 watt 5000va pv 4000watt sol i ax 5p64. mppt is 60 to 140 i think. Thats why 3 serries, 2 maybe not enough and 4 might exceed

@JacoBusa The operating range for that inverter is 40 to 115 volt. 145 VOC is the max voltage. Exceeding that can damage the mppt and is a waste because the mppt will clip the output when above operating voltage.What is the panel VOC 

 

1 hour ago, JacoBusa said:

Good day.

 

The inverter takes what it needs from panels. So its rated at 4000 watt pv and said do no exceed. But why then can u add panels to have more. I have 3900 watts total panels most i have seen is about 2300 watt. Panels dont deliver 100%. so can i add. I have 3 sets off 3 in serries 430 watt that is 1290 per serries and multiply by 3 3870. Max used on inverter 2200 that i have seen. I want to add 2 more rows off 3. Can i do it, how will this affect the max 4000watt of inverter.

 

Thank U

There are many variables that can affect how much the panel's real-world output is different from the ideal conditions under which the rated Wattage is measured. Typical issues:

When or what time of the year were the panels installed? Have you operated them through an entire summer season?

Are the panels installed pointing Northwards at an ideal roof angle for your location? Any chance they are catching shade?

Are all strings pointing in the same direction, or operating against each other at any time of the day?

What type of loads and batteries do you have connected? Do you normally run these loads or charge your batteries flat-out at the middle of the day?

 

I know it's been done to increase the Wattage of the connected panels, but I wouldn't suggest it without understanding your full setup. This includes the panel specs. I mean, just a random search of some specs of some 430W panels out there:

https://diyshop.co.za/products/solar-panel-mono-crystalline-solarwatt-2x430w , https://www.futurelight.co.za/products/430w-solar-panel 

And already there are 2 examples where if these are your specs, it would indicate you've got too many panels in series. Please confirm your exact make and model of all components in the system.