2BAJ5ECO-LFP481000251.2V 100AH LIFEPO4 BATTERY

FCC ID LABEL: Ca. 50mm x 30mm Label Location FCC ID: 2BAJ5ECO-LFP4810002

FCC RF Exposure EUT Description: 51.2V 100AH LIFEPO4 BATTERY Model No.: ECO-LFP4810002 FCC ID: 2BAJ5ECO-LFP4810002 1. Limits According to KDB 447498 D01 General RF Exposure Guidance v06 The 1‐g and 10‐g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤50 mm are determined by: [(max power of channel, including tune‐up tolerance, mW)/(min. test separation distance, mm)]ꞏ[√f(GHz)]≤3.0 for 1‐g SAR and ≤ 7.5 for 10‐g extremity SAR, Where: Result=P/D*√F F= the RF channel transmit frequency in GHz P=Maximum turn‐up power in mw D=Min. test separation distance in mm 2. Test Result of RF Exposure Evaluation Frequency (MHz) Output power (dBm) Tune Up Power (dBm) Max Tune Up power mW Min test separati on distance mm Result Limit SAR Test Exclusion 2412 11.80 10.9±1(11.9) 15.488 10 2.405 3.0 Pass 2480 0.09 0±1(1) 1.259 10 0.198 3.0 Pass Note: PK Output power= conducted power. Conducted power see the test report HK2509014978-1E/2E, antenna gain=4.49dBi Per KDB 447498 D01, when the minimum test separation distance is < 10 mm, a distance of 10 mm is applied to determine SAR test exclusion. The test exclusion threshold is 2.405 which is<= 3, SAR testing is not required. Note: Exclusion Thresholds Results=[(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] ꞏ[√f(GHz)] f(GHz) is the RF channel transmit frequency in GHz Distance=10mm Note: the device could not transmit simultaneously in Bluetooth and 2.4GWIFI.

2025年10月31日 22:37 TEST REPORT Frequency ID1 2 3 4 5 6 7 8 9 10 11 Frequency (MHz)2400.0 2410.0 2420.0 2430.0 2440.0 2450.0 2460.0 2470.0 2480.0 2490.0 2500.0 Gain (dBi)4.41 4.49 4.32 4.20 4.17 4.05 3.81 3.58 3.37 3.45 3.20 Efficiency (%)39.84 39.94 38.12 36.57 36.34 35.69 34.50 33.16 31.56 31.64 29.60 2400.0MHz Total, Eff: 39.8%Back View max39.94 min29.60 2450.0MHz Total, Eff: 35.7%Back View 2500.0MHz Total, Eff: 29.6%Back View

Page 1 of 55 Report No.: HK2509014978-1E FCC Test Report Test Report On Behalf of Xiamen Eco-sources Technology Co.,Ltd For 51.2V 100AH LIFEPO4 BATTERY Model No.: ECO-LFP4810002, ECO-LFP4810003, ECO-LFP4810004, ECO-LFP4810005, ECO-LFP4810006, ECO-LFP485004, ECO-LFP485005, ECO-LFP485006, ECO-LFP485007, ECO-LFP485008, ECO-LFP4831400, ECO-LFP4831401, ECO-LFP4831402, ECO-LFP4831403, ECO-LFP4831404, ECO-Cubix100Pro, ECO-LFP48100WM01 FCC ID: 2BAJ5ECO-LFP4810002 Prepared For: Xiamen Eco-sources Technology Co.,Ltd Room301A, Hong Ye Building, Pioneer Park, Torch High-tech Zone, Xiamen, China Prepared By: Shenzhen HUAK Testing Technology Co., Ltd. 1-2/F., Building B2, Junfeng Zhongcheng Zhizao Innovation Park, Heping, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Date of Test: Sep. 01, 2025 ~ Nov. 21, 2025 Date of Report: Nov. 21, 2025 Report Number: HK2509014978-1E Page 2 of 55 Report No.: HK2509014978-1E Test Result Certification Applicant’s Name ................. : Xiamen Eco-sources Technology Co.,Ltd Address .................................. : Room301A, Hong Ye Building, Pioneer Park, Torch High-tech Zone, Xiamen, China Manufacturer's Name ........... : DUZHENG CLEAN ENERGY CO.,LTD Address .................................. : Unit 401,No.516 Lianting Road, Torch High-Tech Zone (Xiang'an) Industrial Zone,Xiamen Product Description Trade Mark ............................. : N/A Product Name ......................... : 51.2V 100AH LIFEPO4 BATTERY Model and/or Type Reference : ECO-LFP4810002, ECO-LFP4810003, ECO-LFP4810004, ECO-LFP4810005, ECO-LFP4810006, ECO-LFP485004, ECO-LFP485005, ECO-LFP485006, ECO-LFP485007, ECO-LFP485008, ECO-LFP4831400, ECO-LFP4831401, ECO-LFP4831402, ECO-LFP4831403, ECO-LFP4831404, ECO-Cubix100Pro, ECO-LFP48100WM01 Standards ............................... : FCC Rules and Regulations Part 15 Subpart C Section 15.247 ANSI C63.10: 2020 This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen HUAK Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen HUAK Testing Technology Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Date of Test ............................................ : Date (s) of Performance of Tests ............ : Sep. 01, 2025 ~ Nov. 21, 2025 Date of Issue ........................................... : Nov. 21, 2025 Test Result ............................................... : Pass Testing Engineer Len Liao Technical Manager Sliver Wan Authorized Signatory Jason Zhou Page 3 of 55 Report No.: HK2509014978-1E Table of Contents 1. Summary ................................................................................................... 5 1.1 Test Procedures and Results ........................................................................................................... 5 1.2 Information of the Test Laboratory ................................................................................................. 5 1.3 Measurement Uncertainty ................................................................................................................ 6 2. EUT Description ........................................................................................ 7 2.1 General Description of EUT ............................................................................................................. 7 2.2 Carrier Frequency of Channels ........................................................................................................ 8 2.3 Operation of EUT during Testing ..................................................................................................... 8 2.4 Description of Test Setup ................................................................................................................. 9 2.5 Description of Support Units ......................................................................................................... 10 3. General Information ................................................................................ 11 3.1 Test Environment and Mode .......................................................................................................... 11 4. Test Results and Measurement Data .................................................... 14 4.1 AC Conducted Emission ................................................................................................................ 14 4.2 Maximum Peak Conducted Output Power .................................................................................... 17 4.3 Emission Bandwidth ....................................................................................................................... 20 4.4 Power Spectral Density .................................................................................................................. 25 4.5 Conducted Band Edge and Spurious Emission Measurement .................................................. 31 4.6 Radiated Spurious Emission Measurement ................................................................................. 42 4.7 Antenna Requirement ..................................................................................................................... 52 5. Test Setup Photos of the EUT ............................................................... 53 6. Photos of the EUT ................................................................................... 55 Page 4 of 55 Report No.: HK2509014978-1E ** Issued history ** Revision Description Issued Date Remark Revision 1.0 Initial Test Report Release Nov. 21, 2025 Jason Zhou Page 5 of 55 Report No.: HK2509014978-1E 1. Summary 1.1 Test Procedures and Results Requirement CFR 47 Section Result Antenna requirement §15.203/§15.247(b)(4) PASS AC Power Line Conducted Emission §15.207 N/A Conducted Peak Output Power …

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Page 31 of 55 Report No.: HK2509014978-1E 4.5 Conducted Band Edge and Spurious Emission Measurement Test Specification Test Requirement: FCC Part15 C Section 15.247 (d) Test Method: KDB 558074 D01 15.247 Meas Guidance v05r02 Limit: In any 100 kHz bandwidth outside of the authorized frequency band, the emissions which fall in the non-restricted bands shall be attenuated at least 20 dB / 30dB relative to the maximum PSD level in 100 kHz by RF conducted measurement and radiated emissions which fall in the restricted bands, as defined in Section 15.205(a), must also comply with the radiated emission limits specified in Section 15.209(a). Test Setup: Test Mode: Transmitting mode with modulation Test Procedure: 1. The testing follows FCC KDB Publication 558074 D01 15.247 Meas Guidance v05r02. 2. The RF output of EUT was connected to the spectrum analyzer by RF cable. The path loss was compensated to the results for each measurement. 3. Set to the maximum power setting and enable the EUT transmit continuously. 4. Set RBW = 100 kHz, VBW=300 kHz, Peak Detector. Unwanted Emissions measured in any 100 kHz bandwidth outside of the authorized frequency band shall be attenuated by at least 20 dB relative to the maximum in-band peak PSD level in 100 kHz when maximum peak conducted output power procedure is used. If the transmitter complies with the conducted power limits based on the use of RMS averaging over a time interval, the attenuation required under this paragraph shall be 30 dB instead of 20 dB per 15.247(d). 5. Measure and record the results in the test report. 6. The RF fundamental frequency should be excluded against the limit line in the operating frequency band. Test Result: PASS Page 32 of 55 Report No.: HK2509014978-1E Test Instruments RF Test Room Equipment Manufacturer Model Serial Number Calibration Date Calibration Due Spectrum analyzer Agilent N9020A HKE-025 Feb. 19, 2025 Feb. 18, 2026 Spectrum analyzer Agilent N9020A HKE-117 Feb. 19, 2025 Feb. 18, 2026 High pass filter unit Tonscend JS0806-F HKE-055 Feb. 19, 2025 Feb. 18, 2026 RF Cable (9KHz-26.5GHz) Tonscend 170660 N/A Feb. 19, 2025 Feb. 18, 2026 RF automatic control unit Tonscend JS0806-2 HKE-060 Feb. 19, 2025 Feb. 18, 2026 RF Test software Tonscend JS1120-3 Version 3.5.39 HKE-083 N/A N/A Note: The calibration interval of the above test instruments is 12 months and the calibrations are traceable to international system unit (SI). Page 33 of 55 Report No.: HK2509014978-1E Test Data 802.11b Modulation Lowest Channel Highest Channel Band Edge Band Edge Spurious Emission Spurious Emission Page 34 of 55 Report No.: HK2509014978-1E Page 35 of 55 Report No.: HK2509014978-1E Middle Channel Spurious Emission Page 36 of 55 Report No.: HK2509014978-1E 802.11g Modulation Lowest Channel Highest Channel Band Edge Band Edge Spurious Emission Spurious Emission Page 37 of 55 Report No.: HK2509014978-1E Page 38 of 55 Report No.: HK2509014978-1E Middle Channel Spurious Emission Page 39 of 55 Report No.: HK2509014978-1E 802.11n (HT20) Modulation Lowest Channel Highest Channel Band Edge Band Edge Spurious Emission Spurious Emission Page 40 of 55 Report No.: HK2509014978-1E Page 41 of 55 Report No.: HK2509014978-1E Middle Channel Spurious Emission Page 42 of 55 Report No.: HK2509014978-1E 4.6 Radiated Spurious Emission Measurement Test Specification Test Requirement: FCC Part15 C Section 15.209 Test Method: ANSI C63.10: 2020 Frequency Range: 9 kHz to 26 GHz Measurement Distance: 3 m Antenna Polarization: Horizontal & Vertical Operation Mode: Transmitting mode with modulation Receiver Setup: Frequency Detector RBW VBW Remark 9kHz- 150kHz Quasi-peak 200Hz 1kHz Quasi-peak Value 150kHz- 30MHz Quasi-peak 9kHz 30kHz Quasi-peak Value 30MHz-1GHz Quasi-peak 120KHz 300KHz Quasi-peak Value Above 1GHz Peak 1MHz 3MHz Peak Value Peak 1MHz 10Hz Average Value Limit: Frequency Field Strength (microvolts/meter) Measurement Distance (meters) 0.009-0.490 2400/F(KHz) 300 0.490-1.705 24000/F(KHz) 30 1.705-30 30 30 30-88 100 3 88-216 150 3 216-960 200 3 Above 960 500 3 Frequency Field Strength (microvolts/meter) Measurement Distance (meters) Detector Above 1GHz 500 3 Average 5000 3 Peak Test Setup: For radiated emissions below 30MHz Page 43 of 55 Report No.: HK2509014978-1E 30MHz to 1GHz Above 1GHz Test Procedure: 1. For the radiated emission test below 1GHz: The EUT was placed on a turntable with 0.8 meter above ground. The EUT was set 3 meters from the interference receiving antenna, which was mounted on the top of a variable height antenna tower. The EUT was arranged to its worst case and then tune the antenna tower (from 1 m to 4 m) and turntable (from 0 degree to 360 degrees) to find the maximum reading. A pre-amp and a high PASS filter are used for the test in order to get better signal level. 2. For the radiated emission test above 1GHz: Place the measurement antenna on a turntable with 1.5 meter above ground, which is away from each area of the EUT determined to be a source of emissions at the specified measurement distance, while keeping the measurement antenna aimed at the source of emissions at each frequency of significant emissions, with polarization oriented for maximum response. The measurement antenna may have to be higher or lower than the EUT, depending on the radiation pattern of the emission and staying aimed at the emission source for receiving the maximum signal. Page 44 of 55 Report No.: HK2509014978-1E Test Procedure: The final measurement antenna elevation shall be that which maximizes the emissions. The measurement antenna elevation for maximum emissions shall be restricted to a range of heights of from 1 m to 4 m above the ground or reference ground plane. 3. Corrected Reading: Antenna Factor + Cable Loss + Read Level - Preamp Factor = Level 4. For measurement below 1GHz, If the emission level of the EUT measured by the peak detector is 3 dB lower than the applicable limit, the peak emission level will be reported. Otherwise, the emission measurem…

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Page 1 of 40 Report No.: HK2509014978-2E FCC Test Report Test report On Behalf of Xiamen Eco-sources Technology Co.,Ltd For 51.2V 100AH LIFEPO4 BATTERY Model No.: ECO-LFP4810002, ECO-LFP4810003, ECO-LFP4810004, ECO-LFP4810005, ECO-LFP4810006, ECO-LFP485004, ECO-LFP485005, ECO-LFP485006, ECO-LFP485007, ECO-LFP485008, ECO-LFP4831400, ECO-LFP4831401, ECO-LFP4831402, ECO-LFP4831403, ECO-LFP4831404, ECO-Cubix100Pro, ECO-LFP48100WM01 FCC ID: 2BAJ5ECO-LFP4810002 Prepared For : Xiamen Eco-sources Technology Co.,Ltd Room301A, Hong Ye Building, Pioneer Park, Torch High-tech Zone, Xiamen, China Prepared By : Shenzhen HUAK Testing Technology Co., Ltd. 1-2/F., Building B2, Junfeng Zhongcheng Zhizao Innovation Park, Heping, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Date of Test: Sep. 01, 2025 ~ Nov. 21, 2025 Date of Report: Nov. 21, 2025 Report Number: HK2509014978-2E Page 2 of 40 Report No.: HK2509014978-2E Test Result Certification Applicant’s name .................... : Xiamen Eco-sources Technology Co.,Ltd Address .................................... : Room301A, Hong Ye Building, Pioneer Park, Torch High-tech Zone, Xiamen, China Manufacturer's Name ............. : DUZHENG CLEAN ENERGY CO.,LTD Address .................................... : Unit 401,No.516 Lianting Road, Torch High-Tech Zone (Xiang'an) Industrial Zone,Xiamen Product description Trade Mark: N/A Product name ............................. : 51.2V 100AH LIFEPO4 BATTERY Model and/or type reference ... : ECO-LFP4810002, ECO-LFP4810003, ECO-LFP4810004, ECO-LFP4810005, ECO-LFP4810006, ECO-LFP485004, ECO-LFP485005, ECO-LFP485006, ECO-LFP485007, ECO-LFP485008, ECO-LFP4831400, ECO-LFP4831401, ECO-LFP4831402, ECO-LFP4831403, ECO-LFP4831404, ECO-Cubix100Pro, ECO-LFP48100WM01 Standards ................................ : 47 CFR FCC Part 15 Subpart C 15.247; KDB 558074 D01 15.247 Meas Guidance v05r02 ANSI C63.10: 2020 This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen HUAK Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen HUAK Testing Technology Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Date of Test ............................................... : Date (s) of performance of tests ................ : Sep. 01, 2025 ~ Nov. 21, 2025 Date of Issue .............................................. : Nov. 21, 2025 Test Result.................................................. : Pass Testing Engineer Len Liao Technical Manager Sliver Wan Authorized Signatory Jason Zhou Page 3 of 40 Report No.: HK2509014978-2E Contents Page 1 Summary ......................................................................................................................................................... 5 1.1 Test Procedures and Results .................................................................................................................... 5 1.2 Measurement Uncertainty ......................................................................................................................... 6 1.3 Information of the Test Laboratory ............................................................................................................ 6 2 General Information ....................................................................................................................................... 7 2.1 General Description of EUT ...................................................................................................................... 7 2.2 Description of Test Conditions .................................................................................................................. 9 2.3 Description of Test Setup ........................................................................................................................ 10 2.4 Description of Support Units .................................................................................................................... 11 3 Equipments List for All Test Items ............................................................................................................. 12 4 Test Result .................................................................................................................................................... 13 4.1 Antenna Requirement.............................................................................................................................. 13 4.2 AC Power Line Conducted Emission ...................................................................................................... 14 4.3 Radiated Emissions Measurement .......................................................................................................... 17 4.4 Maximum Peak Output Power Measurement ......................................................................................... 25 4.5 Power Spectral Density ........................................................................................................................... 26 4.6 6db Bandwidth ......................................................................................................................................... 29 4.7 Occupied Bandwidth ................................................................................................................................ 31 4.8 Band Edge ............................................................................................................................................... 32 4.9 Conducted Spurious Emissions .............................................................................................................. 34 5 Test Setup Photos of the EUT .................................................................................................................... 38 6 Photos of the EUT ...........…

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Test Model: ECO-LFP4810002 Radiated Emission RF Conducted Emission