SunSynk 8kW User Manual

Website: www.sunsynk.com E-mail: sales@globaltech-china.com
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3.2. BATTERY CONNECTION
The Sunsynk machine can work with both lithium and AGM batteries. The type of battery chosen often
depends on the user's available budget.
An important thing to be aware of with your battery is the C-rating. This is the maximum charge and
discharge of the battery. Charging or discharging the batteries with too much current can be dangerous and
also damage the battery cells. Once the Sunsynk inverter can deliver a high current level, be careful when
selecting the batteries and setting the parameters.
The batteries are often rated higher, however, we recommend keeping it well below the C-rating of the
battery. Generally, AGM batteries have a safe C-rating of 0.1, and lithium batteries have a safe separating of
0.35.
Remember: 4x12V AGM in series will give you just the same C rating.
Below is a rough guide only. For more accurate information, you need to refer to the battery manufacturers
specifications.
Table 1 - Battery guide.
4 x 200 AH AGM
8 x 200 AH AGM
1 x 5KW Lithium
4 x 5KW Lithium
Max Charge
Current
20 Amp 40 Amp 35 Amp 140 Amp
Max Discharge
Current
20 Amp 40 Amp 35 Amp 140 Amp
Cable Size 35 mm 35mm 35mm 50 mm
Fuse Rating 40 Amp 80 Amp 70 Amp 240 Amp
Take great care when connecting batteries, as they can be very dangerous.
For safe operation and compliance, an individual DC overcurrent protector or disconnection device is
required to connect the battery and the inverter. It is recommended to utilise a suitable fuse and DC isolator
(check Figure 15).
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SunSynk 8kW Specifications

General

Rated Power	8kW
Max. DC Voltage	500V
Number of MPPTs	2
Max Output Current	35A
Max Efficiency	97.6%
Battery Voltage	48V
Max Charging Current	190A
Max Discharging Current	190A
Frequency	50/60Hz
Max PV Input	10400W
Operating Temperature	-25°C to 60°C
Protection Rating	IP65
Max DC Input Voltage	500V
Max Input Current	22A
Nominal AC Voltage	230V
Communication	RS485
Protection	Overload Protection
Cooling	Fan