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tmlangel asked

MPPT Maximum Amp charge output by Battery Voltage

I have an installation with a SmartSolar MPPT 100/50 24v system that is peaking out at 25amp output with 1280 Watts of PV Panels. (4Sx2P / 76.4v @ 16.76a

Is the amp capacity for the Smartsolar MPPT’s rated by the Battery Bank Voltage? (Watts)


For example, the SmartSolar MPPT 100/50 is capable of 12/24 Volt charging output.

Does that mean that mean its rated charge capacity is 50amp at 12v and 25amp at 24v?

I can not find any info in the spec sheet or manual that specifies max amps by voltage or max watts.


If this is the case would this be the same for the SmartSolar MPPT 250/100 VE.Can at 12/24/36/48 Volt? Assuming Amps x Volts = Watts is the case?

Volt Amps Watts
12 100 1200
24 50 1200
36 33.34 1200.24
48 25 1200


Thanks in advance

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1 Answer
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wkirby answered ·

The maximum output current of the 100/50 is 50A, simple as that

So, with a battery Voltage of 12V it would make 600W, with a battery Voltage of 14.8V it would make 740W maximum if conditions are favourable and the PV array is 740W or more.
24V battery Voltage = 1200W, 29.6V = 1480W
48V battery Voltage = 2400W, 59.2V = 2960W

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tmlangel avatar image tmlangel commented ·

Thanks wkirby for the quick response and confirming.

Great explanation.

Is that documented anywhere in Victron's specs or whitepapers for reference?

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wkirby avatar image wkirby ♦♦ tmlangel commented ·

Yes, the datasheet tells you the maximum output current and then you do the mathematics from there. There are some examples in the data sheet for a rough guide, the examples with the red arrows in your screenshot above.

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