Shenzhen First Tech Co., Ltd.
| Payment Terms | L/C,T/T |
| 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 | Off Grid inverter |
| Frequency | 50Hz/60Hz |
| Output Voltage | 48VDC |
| Communication Interface | RS485/CAN/USB |
| Brand Name | 1stess |
| Model Number | SP11K4L-UL |
| Certification | CE, IEC |
| Place of Origin | China |
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Product Specification
| Payment Terms | L/C,T/T | 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 | Off Grid inverter | Frequency | 50Hz/60Hz |
| Output Voltage | 48VDC | Communication Interface | RS485/CAN/USB |
| Brand Name | 1stess | Model Number | SP11K4L-UL |
| Certification | CE, IEC | Place of Origin | China |
| High Light | 48V hybrid solar inverter split phase ，dual MPPT solar inverter 5kw ，pure sine wave off-grid inverter | ||
1.Up to 200% oversizing allowed with 3 MPPTS
| |
FAQs asked by different countries:
FAQ: SP Series for Canadian Winters & Grid Reliability
Q: Is this inverter certified by CSA for use in Canada?
A: Yes, it carries the CSA C22.2 certification, making it fully approved for safe installation and use across Canada.
Q: How does it perform in cold Canadian winters?
A: Excellently. The wide operating temperature range starts at -25°C. PV panels actually produce higher voltage in cold weather, which works perfectly within the inverter's 600V max input specification.
Q: Can it power my furnace, sump pump, and fridge during a winter storm outage?
A: Absolutely. The robust backup output is designed to handle these critical loads simultaneously, ensuring your home stays warm, dry, and your food preserved during extended grid outages.
Q: What is the derating policy at -45°C mentioned in the specs?
A: This indicates the inverter's robust design. It can operate in extremely cold environments down to -45°C, though output power may be automatically reduced slightly to protect components, ensuring long-term reliability.
Q: Is the Wi-Fi module reliable in a basement utility room?
A: The optional Wi-Fi/LAN module provides flexibility. For basements with weak signals, the LAN (Ethernet) connection is a highly reliable alternative for consistent monitoring.
Q: Does it have Rapid Shutdown (RSD) functionality as per the Canadian Electrical Code?
A: Yes, it features built-in Rapid Shutdown (RSD) functionality, enhancing firefighter safety by quickly de-energizing the PV array wires when the inverter is shut down.
Q: Can I use it with my existing natural gas generator?
A: Yes, the generator input allows the inverter to use a standby generator to charge the batteries, providing a comprehensive and reliable whole-home backup solution during long winter power failures.
Q: What is the benefit of the high CEC efficiency (96.5%)?
A: The California Energy Commission (CEC) efficiency is a weighted average that better represents real-world performance. A high CEC rating of 96.5% means you will generate more usable AC energy from your PV system over its daily operation.
Q: Is the 5-year warranty sufficient?
A: The standard 5-year warranty is competitive, and the option to extend it to 10 years provides excellent long-term peace of mind for your investment.
Q: Why is this a smart energy solution for a Canadian homeowner?
A: It provides year-round reliability—maximizing solar production in sunny summers and ensuring essential power during storm-related winter outages. It's a CSA-certified, safe, and robust system built for Canadian conditions.
Company Details
Year Established:
2017
Total Annual:
15000000-16000000
Employee Number:
100~150
Ecer Certification：
Verified Supplier
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