Can I use the MPPT100/50 controller (connected to 4 x Eco Worthy 130W flexible panels in series-parallel) to feed two separate systems via an on-off-on 2-pole switch? One system is 24V and the other is 12V. I am concerned that the auto-voltage detection may not like frequent (once a day) changes or that any custom settings may not be retained after a change in battery voltage. Batteries are (for the moment) ordinary deep-cycle lead acid. Thanks in advance for your thoughts!
I would add an orion.
The Victron auto detect works only once the first time it is powered up by the battery and it then locks into the battery voltage. This avoids the problems some other makes of solar have which forget the settings if the battery is disconnected and reset to the wrong voltage. To swap, a manual reset is required. Charge settings would probably swap to default values for the new voltage bit you would have to check this.
As ever, the info is in the manual Section 3.1.
Thank you - if I used two controllers (say, a 100/20 feeding the 24v and a 100/30 feeding the 12v) would they be OK with having the solar panels switched between them? In other words are they happy to be connected to the batteries with no panels connected?
And if that worked, would I be able to monitor both controllers via bluetooth on the app?
Yes, you can disconnect panels while leaving the battery connected.
Or as pointed out above have the single mppt charge the 24V battery then have a 24-12V DC charger for the 12V. They charge at the same time and no need for constant plugging and unplugging.