Synchronize 2 charging controllers SmartSolar 250/100 and BlueSolar 150/45

Q&A and troubleshooting
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1

My setup is as follows:

  • Cerbo GX firmware v3.55
  • BMV-700 firmware V3.11
  • BlueSolar charger MPPT 150/45 rev. 5 firmware 1.64
  • SmartSolar MPPT VE.can 250/100 rev. 2 firmware 3.16
  • 1 battery bank
    I would like to synchronize the operating mode using SmartSolar one as master and the BlueStar as slave (mode Off, Bulk, Absorption, Float).
    The SmartSolar switches to floating mode more quickly at the end of charging (up to 2 hours before) or sometimes it goes into absorbing mode while the main one (SmartSolar) is still in bulk mode.
    Is there a solution?
2

Change absorption time from adaptive to fixed, 6hours on both units.

3

Thanks for the reply. Just for my understanding, why do we have to put 6 hours rather than 4 or something else?
Is there another solution to synchronize the 2 charge regulators?

4

Well, the batteries seem to need up to 5 hours to fully balance, for this they need the absorption voltage.

For me personally : i like to have the full power when the sun goes down, also when fi i make a cup of coffee i dont want to take the energy from the batteries but as much as possible directly from the sun.

So my setting is 10 hours…

5

This solution does not work in my case. The BlueSolar does not behave at all in the same way as the SmartSolar.

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6

Either you did not set the absorption time long enough, or you are in “remote control”

The absorption time of the two chargers is different !

7

On both devices, it took me 4 hours.

8

According to your graphs…you did something wrong…