question

mealingr avatar image

What size array for Victron 100/50?

I have 4 x 250watt panels 38v open cct and 8.8 amp short cct current as labelled on back of panels.

If I hook up the panels in parallel (volts should remain at 38v) and current should be 4 X 8.8 = 35.2 amps.

Is this correct, can I use this setup with a 100/50 Victron smart controller?

Thanks.

parallel
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2 Answers
Matthias Lange - DE avatar image
Matthias Lange - DE answered ·

https://www.victronenergy.com/mppt-calculator

What system voltage do you have?
The 100/50 can charge you battery with up to 50A.
-> at 12V around 700W
-> at 24V around 1400W
-> at 48V around 2800W <- the Voc of your panels in parallel is to low for that, you need to wire at least 2 in series.

So with a 12V system and good weather you maybe cannot use all the available power.

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I am running 2 x 110 ah deep cycle agm batteries in parallel.

The system is 12v with 2 x 110 ah deep cycle agm batteries in parallel with a 400w 12,- 240v inverter and powers a bush shack in outback far north Queensland Australia so ample sun is not a problem.

My main concern is if I would damage the 150/50 regulator with this setup.

Thanks

seb71 avatar image
seb71 answered ·

Better make two strings of two PV panels in series and then put those 2 strings in parallel.


What is the battery voltage (nominal voltage)?


If 12V, you will not use the maximum possible power that your 4 panels can produce (in summer).

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Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

The system is 12v with 2 x 110 ah deep cycle agm batteries in parallel with a 400w 12,- 240v inverter and powers a bush shack in outback far north Queensland Australia so ample sun is not a problem.

My main concern is if I would damage the 150/50 regulator with this setup.

Thanks

Two of your panels in series have 2x38V=76V (VOC).

Plenty of safety margin for that 100/50 solar charger (that 100 means maximum 100V from panel array).

Sound good to me. Have bought the 100/50 and will hook it up tomorrow.

Thanks for your help. I