Victron 100/15 "load output" maximum?

[Gummies]

I have a strange question that I havn't been able to test, but you are all smarter, so... on a "good" day, right now it's quite rainy in California, the charge controller can't seem to get to more than 220w maximum output (the right spec in victron spec sheet per 12v battery setting)

Victron MPPT 100/15 has a load output with a continuous max of 15A.

The setup:
0. PV in: 4S 195W solar panels (80V 10A)
1. Charge Controller to Battery: 2P 12v100ah batteries in parallel
2. Charge Controller to load: "amazon" battery bank (~1000wh)

The question/answer:
1. Is the "load output" shared with the battery "output"? eg. I see it bulking on the battery at ~100W while dispersing out ~120w to the "amazon" battery bank; would this ever be 220W battery charging + 220W load output?
2. Would 2P2S make a difference compared to 4S on battery charging maximum given this is a MPPT (if i upgraded to a victron 100/20)?


Thanks!

 

[sunshine_eggo]

I have a strange question that I havn't been able to test, but you are all smarter, so... on a "good" day, right now it's quite rainy in California, the charge controller can't seem to get to more than 220w maximum output (the right spec in victron spec sheet per 12v battery setting)

Victron MPPT 100/15 has a load output with a continuous max of 15A.

The setup:
0. PV in: 4S 195W solar panels (80V 10A)
1. Charge Controller to Battery: 2P 12v100ah batteries in parallel
2. Charge Controller to load: "amazon" battery bank (~1000wh)

The question/answer:
1. Is the "load output" shared with the battery "output"? eg. I see it bulking on the battery at ~100W while dispersing out ~120w to the "amazon" battery bank; would this ever be 220W battery charging + 220W load output?

Load output is an alternate location to connect to battery. It has a relay in it that allows you to turn on/off output based on various criteria.

https://www.victronenergy.com/upload/documents/Datasheet-SmartSolar-charge-controller-MPPT-75-10,-75-15,-100-15,-100-20_48V-EN.pdf

The load port is rated for 15A - never exceed, not even for surge.

The MPPT output to anything is limited to 15A. Period.

2. Would 2P2S make a difference compared to 4S on battery charging maximum given this is a MPPT (if i upgraded to a victron 100/20)?

No. You're massively over-paneled. You should stick with 4S as you don't want to exceed the 15A PV input current limit.

 

[Gummies]

Load output is an alternate location to connect to battery. It has a relay in it that allows you to turn on/off output based on various criteria.

https://www.victronenergy.com/upload/documents/Datasheet-SmartSolar-charge-controller-MPPT-75-10,-75-15,-100-15,-100-20_48V-EN.pdf

The load port is rated for 15A - never exceed, not even for surge.

The MPPT output to anything is limited to 15A. Period.



No. You're massively over-paneled. You should stick with 4S as you don't want to exceed the 15A PV input current limit.

thanks! Sounds like I may need to step it up to 24v to better utilize some of the over paneling (I only had 300W of panels previously, just bought 4x195w bifacial for ~$530 after tax last month) :D

 

[zeeman]

I have a similar situation, the difference is that I have 2 panels that are facing in wrong direction (North) instead of South, since I am at 44 parallel in Northern hemisphere. Reason for that is that I got those panels is that I can use them as spares for my main solar array, should one or 2 panels fail I can move them to my main solar array that is facing South. So, please do not tell me to place the panels in proper direction, it is impossible at this time. Panels are 540W, 2 panels are connected in series and they are connected to victron solar charger 15/100. I plan to upgrade the charger to proper capacity.

My question is, what is the panel output (or percentage of rated value of panel) that I should expect in best case scenario (sunny day, no clouds) and If anyone has any experience with this kind of setup it will be awesome.
thanks for any feedback.

 

[Gummies]

I have a similar situation, the difference is that I have 2 panels that are facing in wrong direction (North) instead of South, since I am at 44 parallel in Northern hemisphere. Reason for that is that I got those panels is that I can use them as spares for my main solar array, should one or 2 panels fail I can move them to my main solar array that is facing South. So, please do not tell me to place the panels in proper direction, it is impossible at this time. Panels are 540W, 2 panels are connected in series and they are connected to victron solar charger 15/100. I plan to upgrade the charger to proper capacity.

My question is, what is the panel output (or percentage of rated value of panel) that I should expect in best case scenario (sunny day, no clouds) and If anyone has any experience with this kind of setup it will be awesome.
thanks for any feedback.

So, this is just a beginner talking, so take it with a grain of salt (or shaker of it). It depends on your battery's voltage.

If your battery bank is 12v, them Max output you'll get out of your 1080W of solar panel with this charge controller would be that the 12v battery tends to charge at 14.67v or so, therefore, max on 12v battery is 14.67v*15a = 220W

Or you can charge on a 24v battery system at a max of 440W.

 

[zeeman]

So, this is just a beginner talking, so take it with a grain of salt (or shaker of it). It depends on your battery's voltage.

If your battery bank is 12v, them Max output you'll get out of your 1080W of solar panel with this charge controller would be that the 12v battery tends to charge at 14.67v or so, therefore, max on 12v battery is 14.67v*15a = 220W

Or you can charge on a 24v battery system at a max of 440W.

Thanks for your feedback.
I have came up to same conclusion after looking at victron spec sheet and doing some calculations myself.
that scenario applies on on a good solar day with solar panels facing South, but what if they are facing in wrong direction?
I think that would produce lot less energy because sun light is not directly hitting the panels.
I wish there was some tester I could use to figure out the real output.