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| Categories | Off Grid Hybrid Solar Inverter |
|---|---|
| Brand Name: | 1stess |
| Model Number: | EM (PV60-500VDC) 620048L |
| Certification: | CE, IEC |
| Place of Origin: | China |
| MOQ: | 1 piece |
| Price: | To be negotiated |
| Payment Terms: | L/C,D/A,D/P,T/T,Western Union,MoneyGram |
| Supply Ability: | 2000 pieces per month |
| Delivery Time: | 30 days |
| Packaging Details: | carton box |
| Charging Mode: | MPPT |
| Operating Temperature: | -10°C To 50°C |
| Inverter Type: | hybrid solar inverter |
| Frequency: | 50Hz/60Hz |
| Output Voltage: | 48VDC |
| Size: | 438*295*105mm |
| Company Info. |
| Shenzhen First Tech Co., Ltd. |
| Verified Supplier |
| View Contact Details |
| Product List |

| Place of Origin | China | China | China |
|---|---|---|---|
| Mounting Method | Wall Bracket | Wall Bracket | Wall Bracket |
| Nominal Battery Voltage (V) | 24VDC | 48VDC | 48VDC |
| Lithium Battery activation | YES( By PV or Utility) | YES( By PV or Utility) | YES( By PV or Utility) |
| Nominal Voltage | 230VAC | 230VAC | 230VAC |
| Lithium Battery communication | YES(RS485) | YES(RS485) | YES(RS485) |
| Frequency | 50/60Hz | 50/60Hz | 50/60Hz |
| Waveform | Pure Sine wave | Pure Sine wave | Pure Sine wave |
| Solar Charger Type | MPPT | MPPT | MPPT |
| Communication Interface | RS232+RS485 | RS232+RS485 | RS232+RS485 |
| PV Array MPPT Voltage Range | 60VDC~500VDC | 60VDC~500VDC | 60VDC~500VDC |
| Surge Power | 7000VA | 11000VA | 1240VA |
| Size | 358*295*100mm | 438*295*105mm | 438*295*105mm |
| Weight | 7kg | 9kg | 9kg |
| Operating Temperature Range | (-10'℃ to 50℃) | (-10'℃ to 50℃) | (-10'℃ to 50℃) |








Q1: Is the EM1500 model sufficient for a small rural homestead with
lights, a TV, and charging phones?
A: Perfectly. The 1.5KW/1500VA model is an ideal entry-level system
for basic rural electrification, capable of powering LED lights, a
small TV, radio, and phone chargers for several hours on a modest
battery bank.
Q2: Can the MPPT handle the high-altitude, intense sunlight we
experience?
A: The MPPT is designed to operate efficiently in high-irradiance
conditions. The high PV voltage range (up to 500V) helps mitigate
voltage drops over long wire runs, which is common in sprawling
homesteads.
Q3: How reliable is the WiFi monitoring in areas with weak mobile
signals?
A: The WiFi module connects to your local router. For areas with no
internet, a local LAN connection can still be used. For remote
monitoring, a cellular-based data solution would be required
separately.
Q4: What is the difference between the SOL and SBU modes?
A: SOL (Solar First): Uses only solar and battery, never the grid.
SBU (Solar, Battery, Utility): Uses solar first, then battery, and
only switches to grid if battery is low. SBU is more flexible for
locations with an unreliable grid.
Q5: If I only have a small budget for batteries now, can I still
use the system?
A: Yes. You can start with a smaller, more affordable battery bank
and use the "No Battery Mode" during the day. As your budget
allows, you can easily expand your battery storage.
Q6: Do you offer training for local technicians on installation and
maintenance?
A: Yes, we are committed to building local capacity. We periodically
conduct training sessions for our partner technicians to ensure
high-quality, standardized installations and service across the
region.
Q1: With load-shedding, can the inverter automatically switch back
to grid when power returns?
A: Yes. The inverter automatically and continuously monitors the grid
(Utility) supply. Once stable grid power is restored, it will
seamlessly switch back to using it and begin recharging the
batteries if configured to do so.
Q2: Is the efficiency high enough to make a real difference with
our rising electricity costs?
A: With a peak efficiency of 96% from PV to AC, very little solar
energy is wasted as heat. This high efficiency translates directly
into lower energy bills and a faster return on your investment.
Q3: Can it be used as a UPS for a home office with a PC, printer,
and internet router?
A: Absolutely. The pure sine wave and fast transfer time (10ms for
PCs) make it an ideal backup power solution for home offices,
ensuring your work continues uninterrupted during load-shedding.
Q4: What are the physical dimensions? Will it fit in a standard
meter board cabinet?
A: The dimensions are compact. For example, the 3.5KW model is
358x295x100mm. It should fit in many standard cabinets, but we
recommend checking the space and ensuring adequate ventilation as
per the manual.
Q5: Are the products certified with South African National
Standards (SANS)?
A: Our inverters are designed to meet international safety and EMC
standards. We are actively engaged in the certification process
with relevant South African bodies to ensure full local compliance.
Q6: Can I connect a generator directly to the AC input?
A: Yes, the AC input can be connected to a generator. The inverter
will synchronize with the generator's output and can use it to
charge the batteries, providing a comprehensive multi-source backup
solution.
Q1: How does the inverter perform in the extreme heat of the desert
summer?
A: The operating temperature goes up to 50°C. For optimal performance
and longevity in consistently high temperatures, we recommend
installing the unit in a shaded, well-ventilated area to assist
with heat dissipation.
Q2: Is the PV start voltage low enough to start generating power
early in the morning?
A: Yes, the MPPT operates from as low as 60VDC, allowing it to begin
harvesting solar energy early in the day when the sun is low,
maximizing your daily energy production window.
Q3: Can this system power a submersible water pump for irrigation?
A: Yes, the high surge capability is excellent for starting pump
motors. You can run a submersible pump directly from the inverter
using solar or battery power, making it ideal for off-grid
agriculture.
Q4: What is the dust protection level? Is it suitable for sandy
environments?
A: The detachable dust cover provides significant protection against
sand and dust ingress. For extremely sandy conditions, an
additional external enclosure is recommended for maximum
protection.
Q5: Does the BMS communication allow for detailed battery
monitoring?
A: Yes, when connected to a compatible lithium battery via RS485, the
inverter can read and display key data like State of Charge (SOC),
voltage, and temperature, giving you full visibility of your
battery's health.
Q6: Is technical documentation available in Arabic?
A: We provide user manuals and quick installation guides in multiple
languages, including Arabic, to ensure our customers can install
and operate the system with confidence.
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