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voltmeister avatar image
voltmeister asked

Does Victron have a Dual input mppt?

I want a mppt capable of at least 2 separate strings with different voltage, combining and converting the two to battery. Fully utilizing both strings?

If the answer is you need 2 different mppts, one per string, then how can I merge the two mppt’s to provide stable output to battery?

Also can the victron mppts limit current to the battery. If yes, can I in the settings choose for the excess power to be added to the voltage? (Higher voltage).


I plan to feed power stations that can handle different voltages. (But not two different voltages)

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seb71 avatar image
seb71 answered ·

If the answer is you need 2 different mppts, one per string, then how can I merge the two mppt’s to provide stable output to battery?

For small systems, use VE.Smart Networking.

For larger systems, add a GX device.

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There is also the RS MPPT option (for large systems).

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voltmeister avatar image voltmeister commented ·
Thanks. Seems VE.Smart Networking can solve it.

I still need answer to; if I limit the current to e.g. 12amps on each mppt, can I have the excess power convert to increased voltage instead? Let's say I set the mppt to 24v and limit the current to 12amps, what happens to the excess amps the PV produce/injects? Is there a setting where I can utilize excess power when setting an amp limit on the mppt bellow PV.

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wkirby avatar image wkirby ♦♦ voltmeister commented ·
The PV does not "inject" power into the MPPT. The MPPT takes as much power as it needs from the PV array.

If the array is capable of providing more energy than the MPPT is taking, then that wasted is wasted.
If you want to maximise the capacity if the array, then you have to use it. Do this by applying a useful load on to the system. For example, if the MPPT can make 10A from the solar panels and the battery can only accept 5A because it is close to full, then you need to apply a load on the system of 5A to maximise the capacity of the array. There isn't a setting to apply a virtual load on the system, the load needs to be real.

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snoobler avatar image snoobler voltmeister commented ·
Limit MPPT to 12A, you will only get 12A output.


@Seb71 mentioned it, but to elaborate, if you want to have your maximum solar available for loads, but restrict charging, you:


  1. Get a GX device
  2. connect all MPPT/chargers to GX device
  3. enable DVCC
  4. Set maximum charge current in DVCC


This will limit CHARGING to that specified in 4, but it will draw whatever it can from the array to power loads.

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