Victron MPPT 150/60 -tr overpaneling

[mejiaks]

overpaneling Victron MPPT 150/60​

Hi

I am pretty sure this is an east one, but I want to be extremely sure about it.
I just bought a Victron MPPT 150|60 -tr controller
I've read the manual and I know a couple of things:
1. 150VOC is a hard limit, I cannot exceed this by any number or I risk burn down the controller
2. at 24v system my Nominal PV power would be 1720W

so, knowing this, I am using this type of panels
Pmax 455W
VOC 49.8V
Vmp 41.2
lmp 11.05
lsc 11.6a

for sure I am installing 2 units of 455w panels in series, so I would have 910W and 99.6VOC, this is a very safe bet regarding the max VOC of 150 in the MPPT Controller. But I think this controller would be under utilized.
so, here lie my issues:
I cannot use 3 panels in series because, even though I would have 1365W and this is way under the 1720w max, and it wouldn't be a problem, VOC would be 149.4VOC which is dangerously close to the 150VOC max, and , even though in my region we do not have temps under the 16 Celsius, it's still too risky and I won't do that.
In that circumstance, I have to go the next scenario
String # 1
2 panels of 455W and 49.8VOC in series = 910W and 99,6 VOC
String # 2
2 panels of 455W and 49.8VOC in series = 910W and 99,6 VOC

The I would parallel both strings having 1820W and 99.6VOC, I still comply with the 150VOC max of the controller, but the max watts goes 100W over

My question to you experts of Victron, would the 1820W damage my controller or I would be good doing so? I know I probably won't get anything near to that since no panel is 100% efficient, but i want to be double sure.

thanks in advance

 

[seneysolar]

Go for it, 2 strings in parallel will work good. Dont worry about the watts being a little over.

 

[outboard1196]

overpaneling Victron MPPT 150/60​

Hi

I am pretty sure this is an east one, but I want to be extremely sure about it.
I just bought a Victron MPPT 150|60 -tr controller
I've read the manual and I know a couple of things:
1. 150VOC is a hard limit, I cannot exceed this by any number or I risk burn down the controller
2. at 24v system my Nominal PV power would be 1720W

so, knowing this, I am using this type of panels
Pmax 455W
VOC 49.8V
Vmp 41.2
lmp 11.05
lsc 11.6a

for sure I am installing 2 units of 455w panels in series, so I would have 910W and 99.6VOC, this is a very safe bet regarding the max VOC of 150 in the MPPT Controller. But I think this controller would be under utilized.
so, here lie my issues:
I cannot use 3 panels in series because, even though I would have 1365W and this is way under the 1720w max, and it wouldn't be a problem, VOC would be 149.4VOC which is dangerously close to the 150VOC max, and , even though in my region we do not have temps under the 16 Celsius, it's still too risky and I won't do that.
In that circumstance, I have to go the next scenario
String # 1
2 panels of 455W and 49.8VOC in series = 910W and 99,6 VOC
String # 2
2 panels of 455W and 49.8VOC in series = 910W and 99,6 VOC

The I would parallel both strings having 1820W and 99.6VOC, I still comply with the 150VOC max of the controller, but the max watts goes 100W over

My question to you experts of Victron, would the 1820W damage my controller or I would be good doing so? I know I probably won't get anything near to that since no panel is 100% efficient, but i want to be double sure.

thanks in advance

The charge contoller should have VOC and PV current limit , that's your limiting factors . Looks like 50A

 

[740GLE]

Also keep in mind name Wattage rating is rarely achieved.

Chances are you won’t even hit max current charging and clipping.

 

[Q-Dog]

I have a pair of the 150/60s on a 24 volt system. I am slightly overpanelled with 6 Hyundai 300 watt panels (1800 watts) ... works great.

 

[sunshine_eggo]

Power is an OUTPUT rating not input.

Over-paneling rules for Victron:

Matching solar modules to MPPT charge controllers - Victron Energy

Life used to be so simple; in a 12V battery system you took a ‘12V’ solar module, watched carefully that the maximum PV current would not exceed the charge controller maximum current and the system would work. Unfortunately due to the fact, that with PWM controllers the PV module is not feeding...

www.victronenergy.com

Limits to Oversizing a PV array

How to determine by how much you can oversize a PV array? This can be done with help from the spreadsheet tool. Here though is the manual explanation of how it is done.

There are two limits, when determining the maximum array size that can be connected to an MPPT:

1. The Maximum PV open circuit voltage (Voc at STC)
2. The Maximum PV short circuit current (Isc at STC)

Both values are specified in the datasheets of all our MPPT Solar Charge Controllers. Those two ratings of the PV array must not exceed these MPPT limits.

Note that these two maximum ratings must not be multiplied to determine the maximum installable peak power. Instead, each of them needs to checked by itself

According to the above, you could have a 2S4P array of those panels safely on the controller. That's a 3640W array.

 

[oregonsun]

overpaneling Victron MPPT 150/60​

Hi

I am pretty sure this is an east one, but I want to be extremely sure about it.
I just bought a Victron MPPT 150|60 -tr controller
I've read the manual and I know a couple of things:
1. 150VOC is a hard limit, I cannot exceed this by any number or I risk burn down the controller
2. at 24v system my Nominal PV power would be 1720W

so, knowing this, I am using this type of panels
Pmax 455W
VOC 49.8V
Vmp 41.2
lmp 11.05
lsc 11.6a

for sure I am installing 2 units of 455w panels in series, so I would have 910W and 99.6VOC, this is a very safe bet regarding the max VOC of 150 in the MPPT Controller. But I think this controller would be under utilized.
so, here lie my issues:
I cannot use 3 panels in series because, even though I would have 1365W and this is way under the 1720w max, and it wouldn't be a problem, VOC would be 149.4VOC which is dangerously close to the 150VOC max, and , even though in my region we do not have temps under the 16 Celsius, it's still too risky and I won't do that.
In that circumstance, I have to go the next scenario
String # 1
2 panels of 455W and 49.8VOC in series = 910W and 99,6 VOC
String # 2
2 panels of 455W and 49.8VOC in series = 910W and 99,6 VOC

The I would parallel both strings having 1820W and 99.6VOC, I still comply with the 150VOC max of the controller, but the max watts goes 100W over

My question to you experts of Victron, would the 1820W damage my controller or I would be good doing so? I know I probably won't get anything near to that since no panel is 100% efficient, but i want to be double sure.

thanks in advance

I just had to learn all this recently for my 100/20 and 150/45 smartsolars.
You're fine at 2s2p and well within limits.

I was really disappointed I couldn't go 3s with similar 440w panels on the 150/45 or 2s with the 100/20 but it is what it is.

If I was still in the return window I'd have switched to a 250/60 so 4s was possible and I'd have more room for expansion.
I'd also want 48v not 24v setup.