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SunSynk Essential Loads & AC Coupled Solar

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I try to explain how to run you existing AC coupled solar on the essential loads side so it will still contribute to running your loads / charging your batteries when in off-grid mode.
This can be done in two ways.
1 - Directly connect existing AC solar directly to the Aux port and set the inverter AC couple connect / disconnect voltages.
2 - You can still have the AC coupled system contribute to the loads and charge the batteries in the event of a power-cut by having the circuits connected via the Essential Loads port.
The issue you will come across is if the batteries are fully charged and the load is satisfied / the solar is producing more than the load + the charge power of the Sunsynk. You'll need to install a Voltage Sensing Relay on the batteries and a Contactor on the supply to the AC coupled system. When the batteries are fully charged, the VSR will open and disconnect the AC coupled system which is wired via a Contactor.

Опубликовано:

28 авг 2024

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Комментарии : 11

@miltoneduardososa378 6 месяцев назад

Thanks a lot for this video!

@Eggnog3000 10 месяцев назад

Please could you run through how you would set the sunsynk inverter up as a stand-alone AC-coupled battery charger to an existing system with a string inverter (not using the aux terminals)?

@roadeycarl 10 месяцев назад

You simply set the AUX / gen port to "Micro inverter". Nothing physically needs to be wired into this port. The inverter will now watch for any power going past the CT and charge the batteries with this power.

@roadeycarl 10 месяцев назад

Nothing physically needs to be wired into this port. The inverter will now watch for any power going past the CT and charge the batteries with this power

@voltpv7759 6 месяцев назад

What would the AC couple OFF Batt and AC couple ON Batt percentages need to be?@@roadeycarl

@kharleymorgan 5 месяцев назад

this should be a bullet point! took me 5 days to find this answer as i have ac coupled solaredge system...@@roadeycarl

@sukmy1i 2 месяца назад

Hi, great info. When coupled to the grid and using a string inverter in the Gen port.... If the battery is fully charged will the string inverter carry on producing power exporting to the grid through the sunsynk inverter?

@roadeycarl 2 месяца назад

Good question.... I'm not entirely sure but I do know is you can set the gen port to frequency shift which will reduce the generation of the string inverter as the batteries get full. If you'd rather the string inverter still exported when the batteries were full then you'd be better off not connecting the string inverter into the generator port, but just leaving it connected to the supply as normal but selecting "micro inverter" on the SunSynk anyway. This tells the SunSynk to charge from exported power, so as long as the CT is at the origin of the supply, and that is the same supply the string inverter is connected to, the sunsynk will charge from it also.