Stackable Power Inverter (Parallel Power Inverter) User’s Manual
Thanks for purchasing SUN-2500P Stackable Power Inverter. To help you operate the devices properly, please read the manual carefully before you use it and keep it at the safe place for future reference.

 

Designed with advanced conversion technology and controlled by MCU, SUN-Series Power Inverter is one of the most advanced DC to AC inverters. It can convert DC Power to AC power. It can be widely used in vehicles, trains, vessels, solar energy and wind energy generating electricity, mobile office, telecommunications, police and other rush to deal with emergency situations. SUN Power Inverter is of small size, less weight, and easy to use and causes less noise while working. SUN Power Inverter can work safely and smoothly for many years.

It can be used parallel, and also can be used singly. The quantities of stackable power inverters in one parallel system can be composed freely in the range of 10pcs. So the biggest output power can reach to 25KW after stacking.

To ensure proper efficiency the total load should not exceed 90% of the inverters continuous output power, and the start power of the load should not exceed the output surge power of the inverter. 

▲ Do NOT use the inverter in a raining or humid place, it may cause electric shock.

▲ Do NOT insert metals such as bare wire into the output sockets or inside of the inverter through the ventilation hole. This may cause electric shock.

▲ Do NOT put the inverter in a place where children can reach it, it may cause injury and/or electric shock.

▲ Keep the inverter away from flammable materials, fumes or gases when used.

▲ Proper cooling is necessary while operating.

▲ Please insure the inverter is in the “OFF” position when the vehicle is started, otherwise the large instant peak voltage will possibly damage the inverter or connected appliances.

▲ Reliable connections of the inverters DC input/output is necessary as the input current is considerably large when inverter is running. We recommend using a DC Breaker or Inline Fuse.

The inverter must be powered by a DC battery or bank of batteries that have the appropriate voltage and output current.   When the battery is full, the method used to calculate time is as follows:

1. The Master/Slave switch MUST be set to MASTER. If the selection switch is set to the slave position, there will be no power output.

2. The positive and negative terminals on the inverter must be hooked to their respective positive and negative terminals on the battery. The larger the system the thicker the wires need to be. Use only appropriately rated fuse blocks or breakers inline with the positive cable. If you cannot feed the inverter with enough input power, then the output will be low or no output.

3. Switch on the inverter. If the LED indicator is green, it means the inverter is working properly.  If the LED is red and you hear a beep, this means that the DC input voltage low or incorrect. Immediately turn off the inverter and check your connections. 

4.Plug your appliance into the inverter, then switch the inverter on. A green light indicates that everything is working as it should. The inverter has soft-start function.

5.When in use if the alarm beeps the LED indicator will turn red, which means the inverter went into protection mode. Protection mode is an automatic shut down to help avoid damage from happening to the inverter. The number of beeps corresponds to a fault code, these inverters are smart as they tell you what is wrong. You can check the fault code in the “Protection Features” section below.

There is an intelligent protection system with audio and visual alarms within the SUN-Series power inverters. SUN-Series Inverters feature a full range of protection including; over-voltage protection, low-voltage alarm, under-voltage protection, over-heating protection, overload protection, short circuit protection, reverse polarity protection etc.

1. Low-voltage alarm: When the input DC voltage is lower than low-voltage alarm voltage, the low battery alarm tell you that there is less power, but the inverter may continue to work. The alarm sound is a long sounding  "beep --- beep ... ...."

2.  Under-voltage protection: When the input DC voltage is lower than the cut off under-voltage, the power inverter output will be cut off automatically. The alarm will sound as "beep-beep-beep --- beep-beep-beep ... ...." When the input voltage is restored to normal, the inverter will restart automatically.  If the input voltage is immediately restored to normal after an alarm, the alarm will continue to sound for about 30 seconds before the inverter restarts itself.

3. Over-voltage protection: When the input DC voltage is higher than the cut off over-voltage, the power inverter output will be cut off automatically.  The alarm will sound as "beep-beep-beep --- beep- beep-beep ... ...." When the input voltage is restored to normal, the inverter will restart automatically. If the input voltage is immediately restored to normal after an alarm, the alarm will continue to sound for about 30 seconds before the inverter restarts itself.

4. Over-heating protection: When the internal temperature of power inverter is too high (above 85℃), the power inverter output will be cut off automatically. The alarm will sound as "beep-beep-beep-beep--- beep-beep-beep-beep ... ...." The inverter will need to be restarted manually. Turn the inverter off; allow it to cool down before you restart it.  

5. Overload protection: When the power of the load connected to the power inverter exceeds the inverters maximum output, the output would be cut off automatically. The alarm will sound as "beep-beep---beep-beep ... ...." The inverter will need to be restarted manually.

6. Short-circuit protection: When the output is short-circuited, the power inverter output will be cut off automatically. The alarm will sound as "beep-beep-beep-beep-beep---beep-beep-beep-beep-beep... ...." The inverter must be restarted manually.

7. Reverse polarity protection: When the positive and negative poles of the DC input are connected in a reverse fashion the internal fuses will prevent damage to the components of the inverter. The lid of the inverter must be removed to replace the fuses. After the fuses are replaced and the input polarity is corrected the inverter can be used again.

1.      Operating temperature: -10℃~40℃.

2.      Storage temperature: -40℃~85℃.

3.      Considerable air humidity should be less than 85%.

4.      The inverter is only to be used in an environment free of; electrical conductivity, dust or areas where dust explosion is possible, combustibles, fumes, and corrosion-free gas. The inverter may not be used in any are that may pose a fire risk. 

5.      The inverter must be used in an environment free of vibration

A. G.W.:7.5kgs

B. Size: 420 mm *255 mm *100 mm

Fault 1: No AC output

Fault 2：Low output voltage

 

 

 

 

 

Fig.1, Sketch map of inverters connection in a parallel system

SUN-Series Stackable inverters may be stacked in an array of up to 10 inverters. When stacked the “slave” inverters must be turned on first starting with the last slave inverter in the array. After the slave inverters are switched on the “master” inverter may be finally switched on. 

Fig.1 is sketch map of the inverter in parallel connection, where “1” is the master inverter of the parallel inverter system, and “2” & “3” are the slave inverters.   There may ONLY be ONE MASTER inverter per system. (The “master” and “slave” are set using the “master/slave” switch on the inverter). The inverters should be linked together with the sync cable. Now the AC output can be wired in parallel. On the DC side the each input should be connected directly to the battery with ITS OWN LEAD/CABLE. If each input is not connected directly to the battery with its own lead the array of inverters will not have enough input power, therefore it will not be able to make full output. (Note: Each inverter can be hooked to its own battery on the DC side, the do not have to share the same battery) 

 

Fig 2，Internal Diagram

Fig.2 Represents the inner workings of the inverter

 

 

1. The directions must be carefully followed or the inverters may be damaged.

2. In the system there can only be ONE “master” inverter. Decide which inverter you want to use as your master and set it to master. Now set the remaining inverters to “slave”. 

3. With all of the inverters switched OFF; connect the signal lines and the power lines. Pay careful attention when connecting the output power lines. L with L and N with N as shown in Fig 1. If these are mixed up the inverters will go into protection when they are powered on. Repeated mistakes can cause damage to the inverter.

4.Connect the DC negative and positive terminals on the inverters directly the respective negative and positive terminals on the battery.                      Important: If you are using multiple batteries make sure to connect the negative terminals of each of them using 4 gauge wire or thicker. E.g. A 12V inverter is stacked with a 24V inverter; the negative terminals of the 12V battery bank must be connected with the negative terminals of the 24V battery bank.

5. Once the array of inverters is properly installed they may be turned on. The SLAVE inverters MUST be turned on first. Once the slave inverters are powered on, the master may be turned on. If you turn on the master first, you may hear the alarm beep as; "beep---beep---beep… …" from the master, this is indicating that the slave inverters must be powered on. When all of the slaves are turned on and the beeps stop, AC output will be active.

6. When the system is on, you may power on or off any slaves according to the power that your load needs.

7.  Should an inverter go into protection while in use make sure to disconnect all loads prior to troubleshooting.

8. If you want to add or remove an inverter from the parallel system/array you must turn off ALL inverters, disconnect ALL loads, and disconnect the main power source.

There are additional protection features when the inverters are used in parallel, please see below:

1. Synchronization signals are interrupted or error protection: When a slave inverter experiences signal interruption or error the alarm will sound as "beep---beep ... ..." It will not affect the other inverters in the array, however the load is now larger on the remaining inverters as one of your slaves is disabled. After a short period of time the slave inverter will attempt to detect signals again, if successful the inverter will kick back on and operate as normal.  

2. Multiple “masters” protection: When more than one inverter in an array is set to master, the latter master will alarm, and cut off its output. The alarm will sound as "beep---beep ... ...." After corrected, the inverter must be restated manually.

3. N/L connection protection: When the slave inverter detects an error in the L/N connection, it will cut off its output. The alarm will sound as "beep-beep-beep-beep-beep-beep--- beep-beep-beep-beep-beep-beep... ...." After about 40 seconds, it will re-detect, if normal the output will resume automatically. The slave inverters only detect this when they are first powered on, during normal operation they will not continue to detect this. DO NOT make changes to your L/N connections when the inverters are powered on. ALWAYS power the inverters down before you make changes!