Wind turbines
I know you can apparently connect a wind turbine to the sunsynk products....but the information on this is a little vague and sunsynk have not yet answered my tech question.
If I were to purchase a completely separate wind turbine, charge controller and an invertor how is the best way to connect it to compliment my current sunsynk system ?
Can I directly connect it to the batteries ? I assume not as you'll confuse the Sunsynk's BMS.
Can I connect it to my AUX / GEN port and set it up like a generator ?
Do I connect it to my grid supply and have a separate system ?
I'm sorry for these questions if they are silly I just need advice as i would love to add this functionality to my system
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This is my understanding of how you can use wind turbines. This is not intended as an approved recommendation.
The solution depends on the type of wind turbine controller you are using, but most controller will have some sort of brake mechanism which will control the turbine by applying some sort of dump load. When power from the turbine is not required or needs to be reduced a signal needs to be sent to the Wind turbine control to divert power into the dump load.
Using an AC coupled option allow many options. The most suitable option depends on how you want to use the Wind generated energy.
The solution will also depend if you are off grid or grid connected.
Let us assume you are grid connected.
1. AC coupled to the grid. This is probably the easiest to connect a wind turbine, but if you have a hybrid inverter and you want to use this energy to charge the battery, then you will need to use the grid charge settings on the inverter.
2. Use the AUX port and set the inverter to Micro Grid. In this mode inverter will use the power to supply the loads and charge the battery and you do not need to use the grid charge settings to charge the battery from the grid. This mode will also allow you to use wind power to support load connected to the "Load" port in the event the grid is not available. The only requirement here is that wind turbine controller will need to be able to manage the dump load depending on the power required by the inverter to supply the load and charging the battery. This would need a specail type of controller
3. Use one or both MPPT controllers of the inverter. This requires a turbine that can output DC voltage in excess of the minimum PV input voltage. But this is where things are different with wind turbines. Wind turbines will always produces power if the wind blows and if the there is no load the turbine will just speed up, therefore it is required to have some wayto apply a load to the output of the turbines to act as a break. This can be done by the specialised controllers with inbuilt dump loads, or in the case using a SS inverter, you can use the smart load option. However you need to deal with the scenario whe the inverter is not connected and you will need to make sure that the controller can apply a brake to turbine as there is no actual load on the turbine
4. If you want to combine PV and Wind You could use 2 inverters. the reason you may consider this is because you do not have enough MPPT connections. Due to the nature of Wind power, you need to rely on PV as the main source of power and suplement it with wind turbines. However the challenge of connecting the wind turbine does not change.
Option 3 is the suggest method that Synsynk recommend. I have attached a training manual which has a good section on how to connect a wind turbine - Page 50