USER MANUAL - Power Zone
 - # The specifications are subject to changes without notice.
| *The company reserves the right of final interpretation and correction. [| |
Always Power Ready
Pure Sine Wave Inverter & Charger
SPT/SPH Series
Suzhou Develpower Energy Equipment Co.,Ltd
Add: No.99 Gangtian Road,
Suzhou Industrial Park,215121,China
Tel: +86 512 68638910
Fax: +86 512 68638916 CE FCS ROHS
E-mail: [email protected]
|. Important Safety Information ++>..0000000000000000 00000 1
1-1 General Safety Precautions +-+===e==e=e=eeseserreceean. 1
1-2 Precautions When Working with Batteries -.......... 1
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7 5 O Audible Alarm: 000 A 8
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Appendix 0 0 CAE O ATA RAI NT NE NE 17
Important Safety Information
A WARNING! Before using the Inverter, you need to read and save the safety instructions.
1-1. General Safety Precautions
1-1-1.Do not expose the Inverter to rain, snow, spray, bilge or dust. To reduce risk of hazard, do not
cover or obstruct the ventilation openings. Do not install the Inverter in a zero-clearance
compartment. Overheating maybe resulted. Allow at least 30CM of clearance around the inverter for
air flow. Make sure that the air can circulate freely around the unit. A minimum air flow of 145CFM is
1-1-2. To avoid a risk of fire and electronic shock. Make sure that existing wiring is in good electrical
condition; and that wire size is not undersized. Do not operate the Inverter with damaged or
substandard wiring.
1-1-3. This equipment contains components which can produce arcs or sparks. To prevent fire or
explosion do not install in compartments containing batteries or flammable materials or in locations
which require ignition protected equipment. This includes any space containing gasoline-powered
machinery, fuel tanks, or joints, fittings, or other connection between components of the fuel system.
Refer Warranty for instructions on obtaining service.
1-1-4. Do not disassemble the Inverter/Charger. It contains no user-serviceable parts. Attempting to
service the Inverter/Charger by yourself may result in a risk of electrical shock or fire. Internal
capacitors remain charged after all power is disconnected.
1-1-5. To reduce the risk of electrical shock, disconnect both AC and DC power from the SPT Series
Inverter/Charger before attempting any maintenance or cleaning. Turning off controls will not reduce
this risk
CAUTION: Equipment damage
The output side of the inverter's AC wiring can not at no time be connected to public power or a
generator. This condition is far worse than a short circuit. If the unit survives this condition, it will
shut down until corrections are made.
Installation should ensure that the inverter’s AC output is, at no time, connected to its AC input.
Warning: Limitations On Use
1.2 Precautions When Working with Batteries
1-2-1. If battery acid contacts skin or clothing, wash immediately with soap and water. If acid enters
eye, immediately flood eye with running cold water and get medical attention immediately.
1-2-2. Never smoke or allow a spark or flame in vicinity of battery or engine.
1-2-3. Do not drop a metal tool on the battery. The resulting spark or short-circuit on the battery of
other electrical part may cause an explosion.
1-2-4. Remove personal metal items such as rings, bracelets, necklaces, and watches when working
with a lead-acid battery. A lead-acid battery produces a short-circuit current high enough to weld a
ring or the like to metal, causing a severe burn.
1-2-5. To reduce the risk of injury, charge only deep-cycle lead acid, lead antimony, lead calcium gel
cell, absorbed mat, or NiCad/NiFe type rechargeable batteries. Other types of batteries may burst,
cause personal injury and damage.
2-1. General Information
SPT Series Pure Sine Wave Inverter is a combination of an inverter, battery charger and AC auto-
transfer switch into one complete system with a peak conversion efficiency of 88%.
It is packed with unique features and it is one of the most advanced inverter/chargers in the market at
It features power factor corrected, sophisticated multi-stage charging and pure sine wave output with
unprecedentedly high surge capability to meet demanding power needs of inductive loads without
endangering the equipment.
For the regular model, when utility AC power cuts off{or falls out of acceptable range), the transfer
relay is de-energized and the load is automatically transferred to the Inverter output. Once the
qualified AC utility is restored, the relay is energized and the load is automatically reconnected to AC
SPT Series Inverter is equipped with a powerful charger of up to 90Amp(depending on model).
The overload capacity is 300% of continuous output for up to 20 seconds to reliably support tools and
equipment longer
Another important feature is that the inverter can be easily customized to Battery priority via a DIP
switch, this helps to extract maximum power from battery in renewable energy systems.
Thus, the SPT Series Pure Sine Wave Inverter is suitable for Renewable energy system, Utility, RV,
Marine and Emergency appliances.
To get the most output power of the inverter, it must be installed, used and maintained properly.
Please read the instructions in this manual before installing and operating.
2-2. Application
Power tools—circular saws, drills, grinders, sanders, buffers, weed and hedge trimmers, air
Office equipment — computers, printers, monitors, facsimile machines, scanners.
Household items — vacuum cleaners, fans, fluorescent and incandescent lights, shavers, sewing
Kitchen appliances — coffee makers, blenders, ice markers, toasters.
Industrial equipment — metal halide lamp, high — pressure sodium lamp.
Home entertainment electronics — television, VCRs, video games, stereos, musical instruments,
satellite equipment.
2-3. Features
Auto switch 4 FUN : DC to AC , AC bypass, AC charger and UPS
DIP Switches : Low Battery, AC Input Range , Power Saver,
O/P Frequency, Solar/Utility AC Priority ( optional)
Efficiency up 3~5% than SPT, Idle consumption down 30~50% ( optional)
Output AVR : stabilized AC voltage RMS( optional)
Start Auto restart while AC is recovering (optional)
Dry contact : input no AC signal to other device( optional)
Remote control RJ45/R 5232 : PTM-9 and PTM-12(optional)
Pure sine wave output ‚input & output fully isolation
Three-gear switches , With energy saving mode
Excellent loads with 3*rated start power
7 LED display working, Digital LCD display data info
Built-in AC bypass relay, UPS function
4-step intelligent battery charging
8 pre set battery type selector plus de-sulphation for totally flat batteries
Input AC : Utility AC or Generator etc
Advanced microprocessor control
13VDC battery recover point, dedicated for renewable energy systems(optional)
Input polarity/UVP/OVP/OSP/OLP/OTF
2.4 Order information
Typical part number » SPT 2000 = 2 12
1.Basic Series
SPT=Pure Sinewave Inverter&Charger
2 Power Rating
600=600W 1000=1000W 1500=1500W 2000=2000W
3000=3000W 4000=4000W 5000=5000W 6000=6000W
3.AC Voltage
2=230VAC 1=120VAC
4 Battery Voltage
12=12VDC 24=24VDC 48=48VDC Figure 1
Electrical Performance
2.5.1 Invert
The SPT inverter/charger 15 built-in according to the following topology.
Invert: Full Bridge Topology.
Charge: Isolate Boost Topology
Because of high efficiency Mosfets and lóbit, 4.9MHz microprocessor and heavy transformers, it
outputs PURE SINE WAVE AC with an average THD of 15% (min 5%, max 25%) depending of load
connected and battery voltage.
The peak efficiency of SPT series is 88%(SPH 93%).
Overload Capacity
The SPT series inverters have different overload capacities, making it ideal to handle demanding
1 For 110%<Load<125%(+10%]), no audible alarm in 14 minutes, beeps 0.55 every ls in the 15th
minute, and Fault( Turn off) after the 15th minute.
2 For 125%<Load<150%(+10%), beeps 0.5s every 1s and Fault{ Turn off) after the | minute.
3 For 300%zLoad>=150%(£10%), beeps 0.55 every 1s and Fault{Turn off) after 20s.
2.5.2 AC Charger
SPT Series is equipped with an active PFC (Power Factor Corrected) multistage battery charger. The
PFC feature is used to control the amount of power used to charge the batteries in order to obtain a
power factor as close as possible to 1.
Unlike other inverters whose max charging current decreases according to the input AC voltage, SPT
series charger is able to output max current as long as input AC voltage is in the range of 164-
243VAC(95-127VAC for 120V model), and AC freq is in the range of 48-54Hz(55-64Hz for 60Hz
The SPT series inverter is with a strong charging current of 90Amp (for 3IKW,12V), and the max
charge current can be adjusted from 0%-100% via a liner switch at the right of the battery type
selector. This will be helpful if you are using our powerful charger on a small capacity battery bank.
Fortunately, the liner switch can effectively reduce the max charging current to 20% of its peak.
Choosing “0” in the battery type selector will disable charging function.
5 1.5hore power on line battery charger active
2. Inverter power on line, battery charger off
3 Charger on fast charge mode
4 Charger on float charge mode
5 Over temperature trip
É Over load trip
7 Power save function on line
& Battery type selector
Figure 2
There are mainly 3 stages:
Bulk Charging: This is the initial stage of charging. While Bulk Charging, the charger supplies the
battery with controlled constant current. The charger will remain in Bulk charge until the Absorption
charge voltage (determined by the Battery Type selection) is achieved.
Software timer will measure the time from A/C start until the battery charger reaches 0.3V below the
boost voltage, then take this time asTo and Tox 10 = T1.
Absorb Charging: This is the second charging stage and begins after the absorb voltage has been
reached. Absorb Charging provides the batteries with a constant voltage and reduces the DC charging
current in order to maintain the absorb voltage setting.
In this period, the inverter will start a T1 timer; the charger will keep the boost voltage in Boost CV
mode until the T1 timer has run out. Then drop the voltage down to the float voltage. The timer has a
minimum time of 1 hour and a maximum time of 12 hours.
Float Charging: The third charging stage occurs at the end of the Absorb Charging time. While Float
charging, the charge voltage is reduced to the fl oat charge voltage (determined by the Battery Type
selection*). In this stage, the batteries are kept fully charged and ready if needed by the inverter.
If the A/C is reconnected or the battery voltage drops below 12Vdc/24V dc, the charger will reset the
cycle above.
If the charge maintains the float state for 10 days, the charger will deliberately reset the cycle to
protect the battery.
Battery Charging Processes
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Voltage Current- — —
STEP 1=Buik Charge (Constant Current} STEP? = Absorption (Constant Voltage!
ÊTEP 3=Float Voltage STEP 4 = RESET TO STEFP 1
Battery type selector
Switch setting Description Boost / Vde Float / М ас |
0 Charger Off
l Gel USA 14.0 13.7
2 AGM 1 14.1 13.4 |
3 AGM 2 14.6 13.7 |
4 Sealed lead acid 14.4 13.6 |
5 Gel EURO 14.4 13.8 |
6 Open lead acid 14.8 13.3 |
7 Calcium 15.1 13.6 |
8 De-sulphation 15.5 (4 Hours then Off) |
9 Not used | |
12Vdc Mode (*2 for 24V de ; *4 for 48Vdc)
The de-sulphation cycle on switch position 8 is marked in red because this is a very dangerous setting
if you do not know what you are doing. Before ever attempting to use this cycle you must clearly
understand what it does and when and how you would use it.
What causes sulphation? This can occur with infrequent use of the batteries(nor), or if the batteries
have been left discharged so low that they will not accept a charge. This cycle is a very high voltage
charge cycle designed to try to break down the sulphated crust that is preventing the plates taking a
charge and thus allow the plates to clean up and so accept charge once again.
Charging depleted batteries
The SPTseries inverter allows start up and through power with depleted batteries.
For 12VDC model, after the battery voltage goes below 10V, if the switch 1s still (and always) kept in
"ON" position, the inverter is always connected with battery, and the battery voltage doesn't drop
below 2V, the inverter will be able to charge the battery once qualified AC inputs are present.
Before the battery voltage goes below 9VDC, the charging can be activated when the switch is turned
to “Off”, then to “ON”.
When the voltage goes below 9VDC, and vou accidently turn the switch to OFF or disconnect the
inverter from battery, the inverter will not be able to charge the battery once again, because the CPU
loses memory during this process.
Charging current for each model
Model Current Model Current
SPT1000W12V230V 35+/-5A SPT1000W12V120V 20+/-5A
SPT1000W24V230V 20+/-5A SPT1000W24V120V 15+/-5A
SPT1500W12V230V 45+/-5A SPT1500W12V120V 45+/-5A
SPT1500W24V230V 25+/-5A SPT1500W24V120V 25+/-5A
SPT2000W12V230V 65+/-5A SPT2000W12V120V 40+/-5A
SPT2000W24V230V 30+/-5A SPT2000W24V120V 30+/-5A
SPT2000W48V230V 20+/-5A SPT2000W48V120V 15+/-5A
SPT3000W12V230V 85+/-5A SPT3000W12V120V 65+/-5A
SPT3000W24V230V 45+/-5A SPT3000W24V120V 40+/-5A
SPT3000W48V230V 30+/-5A SPT3000W48V120V 25+/-5A
SPT4000W24V230V 65+/-5A SPT4000W24V120V 50+/-5A
SPT4000W48V230V 35+/-5A SPT4000W48&8V120V 30+/-5A
SPT5000W24V230V8 70+/-5A SPT5000W24V120V 55+/-5A
PTI000W 487308 40+/-5A SPT5000W48V120V 35+/-5A
SPT6O00W48V230V 554/-5A
sPT7000Wa8v23ovs | | °5*-5A
The charging capacity will go to peak in around 3 seconds. This may cause a generator to drop
frequency, making inverter transfer to battery mode.
It is suggested to gradually put charging load on the generator by switching the charging switch from
min to max, together with the 15s switch delay, our inverter gives the generator enough time to spin
up. This will depend on the size of the generator and rate of charge.
2.5.3 Transfer
While in the Standby Mode, the AC input is continually monitored. Whenever AC power falls below
the VAC Trip voltage (154 VAC, default setting for 230VAC,90VAC for 120VAC), the inverter
automatically transfers back to the Inverter Mode with minimum interruption to your appliances - as
long as the inverter is turned on. The transfer from Standby mode to Inverter mode occurs in
approximately 10 milliseconds. And it is the same time from Inverter mode to Standby mode.
Though it is not designed as a computer UPS system, this transfer time is usually fast enough to keep
your equipment powered up.
There is a 1 5-second delay from the time the inverter senses that continuously qualified AC is present
at the input terminals to when the transfer is made. This delay is built in to provide time for a
generator to spin-up to a stable voltage and avoid relay chattering. The inverter will not transfer to
generator until it has locked onto the generator’s output. This delay is also designed to avoid frequent
switching when input utility is unstable.
2.5.4 Auto frequency adjust(optinal)
The inverter is with Auto Frequency adjust function.
The factory default configuration for 220/230/240VAC inverter 1s 50Hz, and 60Hz for
110/110/120VAC inverter.
The output freq can be easily changed once a qualified freq is applied to the inverter.
If you want to get 60Hz from a 50Hz inverter, just input 60Hz power, and the inverter will
automatically adjust the output freq to 60Hz and vice versa.
2.5.5 Power Saver
There are 2 different working status for Global LF inverter: “ON” and “OFF”.
When power switch 1s in “ OFF” position, the inverter is powered off.
When power switch is turned to either of “ SAVER ” or “ON”, the inverter is powered on.
Power saver function is designed to conserve battery power when AC power is not or rarely required
by the loads.
In this mode, the inverter pulses the AC output looking for an AC load (i.e., electrical appliance).
Whenever an AC load (greater than 25 watts) is turned on, the inverter recognizes the need for power
and automatically starts inverting and output goes to full voltage. When there is no load (or less than
25 watts) detected, the inverter automatically goes back into search mode to minimize energy
consumption from the battery bank.
In “SAVER” mode, the inverter will draw power mainly in sensing moments, thus the idle
consumption is significantly reduced.
The inverter is factory defaulted to detect load for 250ms every 30 seconds. This cycle can be
customized to 3 seconds thru SW3 on the DIP switch.
Note: The minimum power of load to take inverter out of sleep mode ( SAVER ) is 25 Watts.
SPT Series Idle Power Consumption
Idle 3Secs(Max) 30Secs(MAX)
1000W | 42W 16 W LOW
1500W 485 W 20W 10W
2000W | 60W 25W 10W
3000W 72W 28 W 12W
4000 W 120W 45W 15W
5000W 135W 50W LEW
6000W 145W 55W 18W
7000W 150W 60W 18W
When in the search sense mode, the green power LED will blink and the inverter will make a ticking
sound. At full output voltage, the green power LED will light steadily and the inverter will make a
steady humming sound. When the inverter is used as an “uninterruptible” power supply the search
sense mode or “Saver” function should be defeated.
Some devices when scanned by the load sensor cannot be detected. Small fluorescent lights are the
most common example. (Try altering the plug polarity by turning the plug over.) Some computers and
sophisticated electronics have power supplies that do not present a load until line voltage is
available. When this occurs, each unit waits for the other to begin. To drive these loads either a small
companion load must be used to bring the inverter out of its search mode, or the inverter may be
programmed to remain at full output voltage.
2.5.6 Protections
The SPT series inverter is equipped with extensive protections against various harsh
These protections include:
AC Input over voltage protection/AC Input low voltage protection
Low battery alarm/High battery alarm
Over temperature protection/Over load protection
Short Circuit protection (1s after fault)
Back feeding protection
When Over temperature /Over load occur, after the fault is cleared, the master switch has to be reset
to restart the inverter.
The Low batter voltage trip point can be customized from defaulted value 10VDC to 10.5VDC thru
the SW1 on DIF switch.
The inverter will go to Over temp protection when heat sink temp. =105°C, and go to Fault
(shutdown Output) after 30 seconds. The switch has to be reset to activate the inverter.
The Global LF series Inverter has back feeding protection which avoids presenting an AC voltage on
the AC input terminal in Invert mode.
After the reason for fault is cleared, the inverter has to be reset to start working.
2.5.7 Remote control
Apart from the switch panel on the front of the inverter, an extra switch panel connected to the RJ45
port at the DC side of the inverter thru a standard telephone cable can also control the operation of the
If an extra switch panel is connected to the inverter via “remote control port”, together with the panel
on the inverter case, the two panels will be connected and operated in parallel.
Whichever first switches from “OFF” to “ON” or “SAVER”, it will power the inverter on.
If the commands from the two panels conflict, the inverter will accept command according to the
following priority:
Only when both panels are turned to “OFF” position will the inverter be powered off.
The Max length of the cable is 10 meters.
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Figure 4
Never cut the telephone cable when the cable is attached to inverter and battery 15
connected to the inverter. Even if the inverter is turned off. It will damage the remote PCB
inside if the cable is short circuited during cutting.
2.5.8 LED Indicator & LCD
a o
& 1.5hore power online battery charger active
2 Inverter power on line, battery charger off
3.Charger on fast charge mode
4 Charger on float charge mode
5.0ver temperature trip
6 Over load trip
? Power save funetion on line
8 Battery type selector
al - |
2.5.11 DIP Switches(optional)
On the DC end of inverter, there are 5 DIP switches which enable users to customize the performance
of the device.
Switch NO Switch Function Position: 0 Position: 1
10.0VDC 10.5VDC
SWI Low Battery Trip Volt
*2 for 24VDC, *4 for 48VDC
AC Input Range / 230Vac HV 184-253 Vac /(176-276Vac) | 154-253Vac / (150-276 Vac)
Figure 5
INVERTER ON GREEN LED lit in Inverter Mode
FAST CHARGE Yellow LED lit in Fast Charging Mode
FLOAT CHARGE GREEN LED lit in Float Charging Mode
OVER TEMP TRIP RED LED lit in Over Temperature
POWER SAVER ON GREEN LED lit in Power Saver Mode (Power Saver Load £10W)
2.5.9 Audible Alarm
Battery Voltage Low Inverter green LED lit, and the buzzer beeps 0.55 every 5s.
Battery Voltage High Inverter green LED lit, and the buzzer beeps 0.55 every 15 and Fault after 60s.
(1)110%<load<125%(+10%), No audible alarm in 14 minutes,
Beeps 0.5s every ls in 15th minute and Fault after 15 minutes;
Invert Mode Qver-Load (2)125% <load<150%(=10%), Beeps 0.55 every 1s and Fault after 60s;
(3)Load>150%(+10%), Beeps 0.5s every ls and Fault after 20s;
Over Temperature Heat sink temp. =105%C, Over temp red LED Lighting, beeps 0.5s every ls;
2.5.10 FAN Operation
For 1-3KW, there is one multiple controlled DC fan which starts to work according to the following
For 4-7KW, there is one multiple controlled DC fan and one AC fan. The DC fan will work in the same
way as the one on 1-3KW, while the AC fan will work once there is AC output from the inverter.
So when the inverter is in power saver mode, the AC fan will work from time to time in response to the
pulse sent by the inverter in power saver mode.
The Operation of the DC fan at the DC terminal side is controlled by the following logic:
Condition Enter Condition Leave condition Speed
HEAT SINK. T<85C T>85C 50%
TEMPERATURE T>85'C T<80'C 100%
CHARGER [= 50% Мах | > 50% Мах 50%
CURRENT I > 50% Max | < 40% Max 100%
LOAD Percentage Load < 50% Load = 50% 50%
UNY MODE) Load > 50% Load < 40% 100%
Allow at least 30CM of clearance around the inverter for air flow. Make sure that the air can circulate
freely around the unit,
Fan noise level <60db at a distance of 1m
(AVR) 120VacLV. 100-135Vac / (92-144 Vac) 90-135Vac / (78-144Vac)
SW3 Power Saver Auto Setting | Detect Load Per 5Secs Night Charge Function
SW4 O/P Frequency Setting | 50Hz 60Hz
SW5 Solar/AC Priority Setting Utility Priority Solar Priority
Low Battery Trip Volt:
For 12 YDC model, the Low Battery Trip Volt 1s set at 10.0VDC by default. It can be customized to
10.5VDC using SW, this is to prevent batteries from over-discharging while there is only a small
load applied on the inverter.
*2 for 24VDC, *4 for 48VDC
AC Input Range:
There are different acceptable AC input ranges for different kinds of loads.
For some relatively sensitive electronic devices, a narrow input range of 184-253 VAC (100-135V for
120VAC model) is required to protect them.
While for some resistive loads which work in a wide voltage range, the input AC range can be
customized to 154-253VAC (90-135V for 120VAC model), this helps to power loads with the most
AC input power without frequent switches to the battery bank.
Load Sensing Cycle:
The inverter is factory defaulted to detect load for 250ms in every 30 seconds. This cycle can be
customized to 3 seconds thru the SW3 on the DIP switch.
O/P Frequency Setting:
You can choose 50Hz or 60Hz output via Dip switch
AC/Battery Priority:
Our inverter is designed with AC priority by default. This means, when AC input is present, the
battery will be charged first, and the inverter will transfer the input AC to power the load. Only when
the AC input is stable for a continuous period of 15 days, the inverter will start a battery inverting
cycle to protect the battery. After | cycle normal charging and AC input will be restored.
The AC Priority and Battery Priority switch is SW5. When you choose battery priority, the inverter
will invert from battery despite the AC input. Only when the battery voltage reaches low voltage
alarm point(10.5V for 12V), the inverter transfers to AC Input, charges battery, and switches back to
battery when battery is charged full. This function is mainly for wind/solar systems taking utility
power as back up.
2.5.12 Output Socket
The inverter is either equipped with a dual GFCI socket (rated at 30 Amps) or an universal socket
(rated at 10Amps) for more convenient wiring.
2.5.13 Other features
Battery voltage recover start
After low battery voltage shut off (10V for 12V model or 20V for 24V model), the inverter is able to
restore operation after the battery voltage recovers to 13V/26V (with power switch still in the “On”
position). This function helps to save the users extra labor to reactivate the inverter when the low
battery voltage returns to an acceptable range in the renewable energy systems. The built-in battery
charger will automatically reactivate as soon as city/generator ac has been stable for 15 seconds.
Never leave the loads unattended, some loads (like a Heater) may cause accident in such
It is better to shut everything down after low voltage trip than to leave your load on, due
to the risk of fire.
Auto Gen Start
The inverter can be customized to start up a generator when battery voltage goes low.
When it goes to low battery, the inverter will alarm and it can send a signal to start a generator, and
turn the generator off after battery charging is finished.
The auto gen start feature will only work with generators designed to work with this feature. There is
an open/closed relay that will short circuit the positive and negative cable from a generator. The input opone
DC voltage can vary, but the Max current the relay can carry is 16 Amp.
Conformal Coating
ALL DEVEL SPT/SPH inverters have been processed with a conformal coating on the PCB making it
water, rust, and dust resistant.
INPUT: Utility AC or Generator
_ AC Intput
Installation E = Eu
Е mon AC Output
3.1 Location
Follow all the local regulations to install the inverter.
Please install the equipment in a location that is Dry, Clean, Cool and that has good ventilation.
Working temperature: - 10°C - 407
Storage temperature: - 40 - 70°C
Relative Humidity: 0% - 95%, non-condensing
Cooling: Forced air
OUTPUT: Connect the AC load
3.2 DC Wiring recommendation “da a E
It is suggested the battery bank to be kept as close as possible to the inverter. The following able is a Main domestic battery bank
suggested wiring option for 1 meter DC cable. Figure 6
Please find the following minimum wire size. In case of DC cable longer than 1m, please increase the
cross section of cable to reduce the loss. A FORBID: Do not reverse
Po DC Input voltage Wire Gage to the battery and the inverter polarity
1KW 12V AWG 1/0
1.5KW | 12V AWG 1/0 ¿e бя,
LSKW | 24V AWG 4 yt Input | Output”.
2KW | 12V AWG 1/0 mee Eos * | ACIO Connection: ELNINLE +
| 350020000000300000 Remove cover plate . OOO >
2KW 24V AWG 1/0 alt." 1 "90990090 .
2KW | 48V AWG 4 32, % 7 Tala E A
| a
JKW 12V AWG 4/0 aa. AC 8 AC
| y Power in Power out
3KW 24V AWG 1/0 } +
3KW | 48V AWG 4
4EW 24V AWG 1/0 Figure 7
4KW 48V AWG 1/0 NOTE:
SKW 24V AWG 4/0 INPUT: Just connect Utility AC or Generator etc
SKW | 48V AWG 1/0 OUTPUT: Just connect the AC load
6KW 24v AWG 4/0 E/L/N: Earth live Null
6K W | 48V AWG 1/0
ТК 45V AWG 1/0 is уче
| FORBID: Do not connect the Utility AC or Generator to output AC for avoiding
permanently damaging the inverter.
In the instant , the spark happen when battery connected first, it is a normal
phenomenon because the capacitor is charging state
3.3AC Wiring
We recommend using 1 0-5Awg wire to connect to the ac terminal block.
There are 3 different ways of connecting to the terminal block depending on the model. All the
wirings are CE compliant, Call our tech support if you are not sure about how to wire any part of your
10 11
3.4 Install Flange
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Figure 12
Troubleshooting Guide
Troubleshooting contains information about how to troubleshoot possible error conditions while
using the SPT Inverter & Charger.
The following chart is designed to help you quickly pinpoint the most common inverter failures.
Indicator and Buzzer
Indication & fault find
L.E.D.s on main unit
L.E.D.s on remote
Possible Cause
Recommended Solution
Inverter will not turn on during
initial power up.
Batteries are not connected,
loose battery-side connections.
Low battery voltage.
Check the batteries and cable
connections. Check DC fuse
and breaker.
Charge the battery.
No AC output voltage and no
indicator lights ON.
Inverter has been manually
transitioned to OFF mode.
Press the switch to SAVER
or ON position.
AC output voltage is low and
the inverter turns loads OFF
in a short time.
Charger is inoperative and
unit will not accept AC.
Low battery.
AC voltage has dropped
Check the condition of the
batteries and recharge
if possible.
Check the AC voltage for
proper voltage and frequency.
Charger is supplying a lower
charge rate.
Charger controls are improperly set.
Low AC input voltage.
Loose battery or AC input
Refer to the section on adjusting
the “Charger Rate™.
Source qualified AC power..
Check all DC /AC connections.
Charger turns OFF while
charging from a generator.
Sensitive loads turn off
temporarily when transferring
High AC input voltages from the
Inverter's Low voltage trip
voltage may be too low
to sustain
Load the generator down with
a heavy load.
Turn the generator output
voltage down.
Choose narrow AC voltage in
the DIP switch, or Install a
UPS if
between grid and inverting.
Certain loads.
Noise from Transformer/case*
Applying specific loads such
as hair drier
Remove the loads
The reason for the noise from transformer and/or case General specifictaion Power star
Input wave form: Sine wave (utility or Generator)
When in inverter mode sometimes the transformer and/or case of the inverter may vibrate and make Nominal voltage: 120VAC 230VAC
noise. Low voltage trip: 100/90 £4% 184v/154v+4%
Low voltage re engage: 100/95v £4% 194v/164v+4%
If the noise comes from transformer: High voltage trip: 135v+4% 253v+4%
According to the characteristics of our inverter, mainly there is one type of load which most likely High voltage re engage: 127v+4% 243v 14%
may cause rattles of transformer. Max input AC voltage: 150МАС 270VAC
Thatis half wave load: A load that uses only half cycle of the power (see figure 1). This tends to cause Mominal input frequency: 50Hz or 60Hz (Auto detect)
an imbalance of the magnetic field of the transformer, reducing its rated working freq from 20KHz to, Low freq trip: 47Hz for SOHz,57Hz for 60Hz
say, maybe 15K Hz (it varies according to different loads). In such a case the frequency of noise falls High frg trip: 55Hz for 50Hz for 60Hz
exactly into the range (200Hz-20K Hz) that human ears can hear. Output wave form: (bypass modejsame as input
The most common load of such kind is a hair drier. Overload protection: Circuit breaker
Short circuit protection: Circuit breaker
If the noise comes from the case: Transfer switch rating: 30amp or 40amp
Normally when loaded with inductive loads, the magnetic field generated by the transformer keeps Effecieney on line transfer mode 95%
attracting or releasing the steel case at a specific freq, this may also cause noise. Line transfer time: Ems Typical
Reducing the load power or using an inverter with bigger capacity will normally solve this problem. Bypass without battery connected Tes
The noise will not do any harm to the inverter or the loads. Max bypass current: 30amp or 40amp
Bypass over load current: 30 amp 40 amp
Inverter Specification/output
Output wave form: Pure sine wave or quasi sine wave
U Output continous power watts: 1000 1500 2000 3000 4000 5000 6000 7000
Output continous power VA: 1300 2000 2500 3800 5000 6300 7500 8800
Power factor 0.1-1.0
Nominal output voltage rms 120/230VAC
Output voltage regulation: +/-5% ms
Output frequency: 50Hz+0.3Hz or 60H=+0.3H:
Nominal efficiency: >88%
surge ratings: 3000 4500 6000 9000 12000 15000 18000 21000
Figure 13 Short circuit protection: Yes , fault after 10 secs
Inverter specifictaion/input:
Nominal input voltage: 12 24y 48v
Minimum start voltage: lüv 20% 40%
Low battery alarm: 10.5% 21% 42%
A - 7 Low battery trip: 10% 20% 40%
À a r | а Ш La - High ne mm Löw 32w dv
Power saver: Below 25 watts when enabled
Dear Customers, a a Same switched on/off on remote
Many thanks for selecting products from DevelPower. In order to extend better service to you, please CESE GE (OU TAC OS IETVAE 1AAVAC 16 NA
read our Product Information Guide carefully. Welcome to log in to enjoy full- ad da
с Output voltage: Dependent on battery type
scale support and service. y
Charge current: I5AT0A
ds afferaÏ year nia warranty: Battery initial voltage for start up: 0-15.7v for ma for Em for 48)
Over charge protection shutdown: 15.Tv for 12v (2for 24v:"4 for 48v)
In the warranty period, we will provide free repair and replacement of parts when the machine is
under normal use. Our company owns parts such as damage and failure
The following cases are not covered under warranty.
Charger curves (4stage constant current) battery types
4 step digital controlled progressive charge
Battery type: Fast V loat V(*2 for 24V;*4 for 48V)
. Gel US.A 14 13.7
| DC polarity reverse. | AGM.1 14.1 134
The inverteris designed without DC polarity reverse protection. A polarity reverse may severely AG has чт
damage the inverter. ad ha 1
TE Gel euro 14.4 13.6
2 Wrong AC wiring Open lead acid 14.8 13.3
E. Calcium 15.1 13.6
3 Operating in a wet environment. De-sulphation 15.5 for 4 hrs
Remote control /RS232/R145 Yes. Optional
4 Operating with an undersized generator or generator with unqualified wave form. Bi L000] 50020003000 Model:442*218*170mm?
4000/5000/6000/ 7000 Model:598*218* 1 79mm?
Weight: 1000 1500 2000 3000 4000 5000 6000 7000
| 6kg ITkg 20kg 24kg 35kg 43kg 45kg 47ke
5 Change the company trademark unauthorized
16 17
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