2BBH5-BJ4880FNegative MPPT Solar Charge Controller

- Guangzhou Boju Information Technology Co.,Ltd - Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 3/12/2024 U.S. Agent Designation [Guangzhou Boju Information Technology Co.,Ltd] acknowledges their consent for the following contact located in the United States to act as their agent for service of process for the equipment for which authorization is sought (FCC ID: [2BBH5-BJ4880F]): Name and company of U.S. agent: Bouge Tech Inc Physical U.S. address of agent: 457 E MCGLINCY LN, CAMPBELL, CA 95008 FRN of U.S. agent: 0033768409 Email address of U.S. agent: [email protected] [Bouge Tech Inc] acknowledges their obligation to accept service of process on behalf of [Guangzhou Boju Information Technology Co.,Ltd]. [Guangzhou Boju Information Technology Co.,Ltd] with the FRN [0033851213] accepts its obligation to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. By signing this form, we confirm the above and that we are aware of the application requirements listed under § 2.911(d)(7). The information provided in this letter is based on the referenced rule parts of Title 47 of the CFR as well as KDB 986446 D01. An expiration date for this letter does not exist. In case the U.S. agent changes, the grantee is obligated to notify the FCC within 30 days via the granting TCB. Sincerely, Signature [Name] Jack Li [Title] Manger [Company] Guangzhou Boju Information Technology Co.,Ltd [Name of U.S. agent] Jason Zheng [Title of U.S. agent] GM [Company of U.S. agent] Bouge Tech Inc 48_[mo del] US_Agent_2.911(d)(7) - U, V04

Guangzhou Boju Information Technology Co.,Ltd The information provided in this letter is based on the referenced rule parts of Title 47 of the CFR as well as KDB 986446 D01. Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 3/12/2024 To whom it may concern: We, [Guangzhou Boju Information Technology Co.,Ltd], hereby certify that the equipment for which authorization is sought (FCC ID: [2BBH5-BJ4880F]) is not “covered” equipment prohibited from receiving an equipment authorization pursuant to § 2.903 of the FCC rules. We also certify that, as of the date of the filing of the application, we are not identified on the Covered List (https://www.fcc.gov/supplychain/coveredlist ) as an entity producing “covered” equipment. By signing this form, we confirm the above and that we are aware of the application requirements listed under § 2.911(b) and (d)(5) and (6). Sincerely, Signature [Name] Rui Wang [Title] Manager [Company] Guangzhou Boju Information Technology Co.,Ltd 62_[model] CoveredEqu_2.911(d)(5)(i) and (ii) - U, V02

Label Location On EUT Label Product Name: Negative MPPT Solar Charge Controller Model Number: BJ48100F FCC ID: 2BBH5-BJ4880F This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and This device must accept any interference received, including interference that may cause undesired operation.

RF EXPOSURE EVALUATION According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency(RF) Radiation as specified in §1.1307(b) FCC ID: 2BBH5-BJ4880F EUT Specification EUT Negative MPPT Solar Charge Controller Frequency band (Operating) WLAN: 2.412GHz ~ 2.462GHz WLAN: 5.18GHz ~ 5.24GHz WLAN: 5.745GHz ~ 5.825GHz Others: 2.402GHz~2.480GHz Device category Portable (<20cm separation) Mobile (>20cm separation) Others ___ Exposure classification Occupational/Controlled exposure (S = 5mW/cm2) General Population/Uncontrolled exposure (S=1mW/cm2) Antenna diversity Single antenna Multiple antennas Tx diversity Rx diversity Tx/Rx diversity Max. output power 2.03 dBm (0.0016W) Antenna gain (Max) 0.48 dBi Evaluation applied MPE Evaluation SAR Evaluation Limits for Maximum Permissible Exposure(MPE) Frequency Range(MHz) Electric Field Strength(V/m) Magnetic Field Strength(A/m) Power Density(mW/cm 2 ) Average Time (A) Limits for Occupational/Control Exposures 300-1500 -- -- F/300 6 1500-100000 -- -- 5 6 (B) Limits for General Population/Uncontrol Exposures 300-1500 -- -- F/1500 6 1500-100000 -- -- 1 30 Friis transmission formula: Pd=(Pout*G)\(4*pi*R2) Where Pd= Power density in mW/cm 2 Pout=output power to antenna in Mw G= gain of antenna in linear scale Pi=3.1416 R= distance between observation point and center of the radiator in cm Pd the limit of MPE, 1mW/cm2. If we know the maximum gain of the antenna and total power input to the antenna, through the calculation, we will know the distance where the MPE limit is reached. Measurement Result Operating Mode Channel Frequency (MHz) Measured Power (dBm) Tune up tolerance (dBm) Max. Tune up Power (dBm) Antenna Gain (dBi) Power density at 20cm (mW/ cm 2 ) Power density Limits (mW/cm 2 ) BLE 2402 1.66 1.66±1 2.66 0.48 0.0004 1 2440 1.91 1.91±1 2.91 0.48 0.0004 1 2480 2.03 2.03±1 3.03 0.48 0.0004 1 Pass

TEST REPORT Report No.: 8135EU011104W Applicant: Guangzhou Boju Information Technology Co.,Ltd Address: Unit L3A01-2 No.31 XiCha Road Baiyun District Guangzhou 510407 Guangdong CN Product Name: Negative MPPT Solar Charge Controller Model No.: BJ48100F (refer to clause 2.4) Trademark: BougeRV FCC ID: 2BBH5-BJ4880F Test Standard(s): 47 CFR Part 15 Subpart C Date of Receipt: Dec. 11, 2023 Test Date: Dec. 11, 2023 – Mar. 11, 2024 Date of Issue: Mar. 12, 2024 ISSUED BY: SHENZHEN EU TESTING LABORATORY LIMITED Prepared by: Reviewed and Approved by: ____________________ _____________________ Mikey Zhu/ Engineer Sally Zhang/ Manager Page 2 of 30 Report No.: 8135EU011104W TRF No.: FCC Part 15 Subpart C_BLE (A01) Revision Record Report Version Issued Date Description Status V0 Mar. 12, 2024 Original Valid Page 3 of 30 Report No.: 8135EU011104W TRF No.: FCC Part 15 Subpart C_BLE (A01) Table of Contents 1 COVER PAGE .................................................................................................................................. 1 2 GENERAL INFORMATION ...................................................................................................................... 5 2.1 APPLICANT INFORMATION .................................................................................................................. 5 2.2 MANUFACTURER INFORMATION .......................................................................................................... 5 2.3 FACTORY INFORMATION ..................................................................................................................... 5 2.4 GENERAL DESCRIPTION OF E.U.T. ..................................................................................................... 5 2.5 TECHNICAL INFORMATION OF E.U.T. .................................................................................................. 6 3 TEST SUMMARY ...................................................................................................................................... 7 3.1 TEST STANDARD ............................................................................................................................... 7 3.2 TEST VERDICT ................................................................................................................................... 7 3.3 TEST LABORATORY ........................................................................................................................... 7 4 TEST CONFIGURATION .......................................................................................................................... 8 4.1 TEST ENVIRONMENT .......................................................................................................................... 8 4.2 TEST EQUIPMENT .............................................................................................................................. 8 4.3 DESCRIPTION OF SUPPORT UNIT ........................................................................................................ 9 4.4 TEST MODE ...................................................................................................................................... 9 4.5 MEASUREMENT UNCERTAINTY ........................................................................................................... 9 4.6 DEVIATION FROM STANDARDS ........................................................................................................... 9 4.7 ABNORMALITIES FROM STANDARD CONDITION ................................................................................... 9 5 TEST ITEMS ........................................................................................................................................... 10 5.1 ANTENNA REQUIREMENT .................................................................................................................. 10 5.1.1 Test Requirement ........................................................................................................... 10 5.1.2 Antenna Anti-Replacement Construction ........................................................................ 10 5.1.3 Antenna Gain .................................................................................................................. 10 5.2 CONDUCTED EMISSION AT AC POWER LINE ..................................................................................... 11 5.2.1 Test Requirement ........................................................................................................... 11 5.2.2 Test Setup Diagram ........................................................................................................ 11 5.2.3 Test Procedure ............................................................................................................... 11 5.2.4 Test Data......................................................................................................................... 11 5.3 DTS BANDWIDTH ............................................................................................................................ 12 5.3.1 Test Requirement ........................................................................................................... 12 5.3.2 Test Setup Diagram ........................................................................................................ 12 5.3.3 Test Procedure ............................................................................................................... 12 5.3.4 Test Data......................................................................................................................... 12 5.4 MAXIMUM CONDUCTED OUTPUT POWER .......................................................................................... 13 5.4.1 Test Requirement ........................................................................................................... 13 5.4.2 Test Setup Diagram .....................................…

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Page 1 of 24 Report No.: 8135EU011104W-AD ANNEX D TEST DATA For Project No.: 8135EU011104W Client: Guangzhou Boju Information Technology Co.,Ltd Product Description: Negative MPPT Solar Charge Controller Model No.: BJ48100F FCC ID: 2BBH5-BJ4880F Technology: Bluetooth BLE Test Engineer: Test Date: 2024-03-11 Page 2 of 24 Report No.: 8135EU011104W-AD Test Summary Item Result Duty Cycle Pass Bandwidth Pass Maximum Conducted Output Power Pass Maximum Power Spectral Density Pass Unwanted Emissions In Non-restricted Frequency Bands Pass Page 3 of 24 Report No.: 8135EU011104W-AD 1. Duty Cycle 1.1 Ant1 1.1.1 Test Result Ant1 Mode TX Type Frequency (MHz) T_on (ms) Period (ms) Duty Cycle (%) Duty Cycle Correction Factor (dB) Max. DC Variation (%) 1M SISO 2402 2.094 3.124 67.03 1.74 16.78 2440 2.095 3.125 67.04 1.74 16.78 2480 2.095 3.125 67.04 1.74 16.78 Page 4 of 24 Report No.: 8135EU011104W-AD 1.1.2 Test Graph 1M_LCH_2402MHz_Ant1_NTNV 1M_MCH_2440MHz_Ant1_NTNV Page 5 of 24 Report No.: 8135EU011104W-AD 1M_HCH_2480MHz_Ant1_NTNV Page 6 of 24 Report No.: 8135EU011104W-AD 2. Bandwidth 2.1 OBW 2.1.1 Test Result Mode TX Type Frequency (MHz) ANT 99% Occupied Bandwidth (MHz) Verdict Result 1M SISO 2402 1 1.014 Pass 2440 1 1.015 Pass 2480 1 1.017 Pass Page 7 of 24 Report No.: 8135EU011104W-AD 2.1.2 Test Graph 1M_LCH_2402MHz_Ant1_NTNV 1M_MCH_2440MHz_Ant1_NTNV Page 8 of 24 Report No.: 8135EU011104W-AD 1M_HCH_2480MHz_Ant1_NTNV Page 9 of 24 Report No.: 8135EU011104W-AD 2.2 6dB BW 2.2.1 Test Result Mode TX Type Frequency (MHz) ANT 6dB Bandwidth (MHz) Verdict Result Limit 1M SISO 2402 1 0.644 >=0.5 Pass 2440 1 0.640 >=0.5 Pass 2480 1 0.643 >=0.5 Pass Page 10 of 24 Report No.: 8135EU011104W-AD 2.2.2 Test Graph 1M_LCH_2402MHz_Ant1_NTNV 1M_MCH_2440MHz_Ant1_NTNV Page 11 of 24 Report No.: 8135EU011104W-AD 1M_HCH_2480MHz_Ant1_NTNV Page 12 of 24 Report No.: 8135EU011104W-AD 3. Maximum Conducted Output Power 3.1 Power 3.1.1 Test Result Mode TX Type Frequency (MHz) Maximum Peak Conducted Output Power (dBm) Verdict ANT1 Limit 1M SISO 2402 1.66 <=30 Pass 2440 1.91 <=30 Pass 2480 2.03 <=30 Pass Page 13 of 24 Report No.: 8135EU011104W-AD 3.1.2 Test Graph 1M_LCH_2402MHz_Ant1_NTNV 1M_MCH_2440MHz_Ant1_NTNV Page 14 of 24 Report No.: 8135EU011104W-AD 1M_HCH_2480MHz_Ant1_NTNV Page 15 of 24 Report No.: 8135EU011104W-AD 4. Maximum Power Spectral Density 4.1 PSD 4.1.1 Test Result Mode TX Type Frequency (MHz) Maximum PSD (dBm/3kHz) Verdict ANT1 Limit 1M SISO 2402 -13.71 <=8 Pass 2440 -13.60 <=8 Pass 2480 -12.93 <=8 Pass Page 16 of 24 Report No.: 8135EU011104W-AD 4.1.2 Test Graph 1M_LCH_2402MHz_Ant1_NTNV 1M_MCH_2440MHz_Ant1_NTNV Page 17 of 24 Report No.: 8135EU011104W-AD 1M_HCH_2480MHz_Ant1_NTNV Page 18 of 24 Report No.: 8135EU011104W-AD 5. Unwanted Emissions In Non-restricted Frequency Bands 5.1 Ref 5.1.1 Test Result Mode TX Type Frequency (MHz) ANT Level of Reference (dBm) 1M SISO 2402 1 1.37 2440 1 1.50 2480 1 1.82 Note1: Refer to FCC Part 15.247 (d) and ANSI C63.10-2020, the channel contains the maximum PSD level was used to establish the reference level. Page 19 of 24 Report No.: 8135EU011104W-AD 5.1.2 Test Graph 1M_LCH_2402MHz_Ant1_NTNV 1M_MCH_2440MHz_Ant1_NTNV Page 20 of 24 Report No.: 8135EU011104W-AD 1M_HCH_2480MHz_Ant1_NTNV Page 21 of 24 Report No.: 8135EU011104W-AD 5.2 CSE 5.2.1 Test Result Mode TX Type Frequency (MHz) ANT Level of Reference (dBm) Limit (dBm) Verdict 1M SISO 2402 1 1.82 -18.18 Pass 2440 1 1.82 -18.18 Pass 2480 1 1.82 -18.18 Pass Note1: Refer to FCC Part 15.247 (d) and ANSI C63.10-2020, the channel contains the maximum PSD level was used to establish the reference level. Page 22 of 24 Report No.: 8135EU011104W-AD 5.2.2 Test Graph 1M_LCH_2402MHz_Ant1_NTNV 1M_LCH_2402MHz_Ant1_NTNV Page 23 of 24 Report No.: 8135EU011104W-AD 1M_MCH_2440MHz_Ant1_NTNV 1M_HCH_2480MHz_Ant1_NTNV Page 24 of 24 Report No.: 8135EU011104W-AD 1M_HCH_2480MHz_Ant1_NTNV --------- End of Report -------

ZXWTEL：0755-27087743FAX：0755-27087743www.wlsiot.com Versionoftheno. ：SPEC-ZXW20220303 effectivedate commencementdate：2022-03-03 ShenzhenZhixingMicroTechnologyCo.,Ltd 2.4GHzantenna Acknowledgethebook customername： manufacturer：ShenzhenZhixingMicroTechnology Co.,Ltd CustomerMaterialNumber：productmodel：ZXWD30PCBANT Partof： serialnumber：ZXW20220303002 versions：A01 ThisSpecificationsisreceived SIGN: DATE: DrawnbyCheckedbyApprovedby Jhon 2022/03/03 Judy 2022/03/03 Devin 2022/03/03 Address:1912,Jinhao Building,No.109,Guangshen Road,FuyongStreet,Bao'an District,Shenzhen TEL:0755-27087743FAX:0755-27087743 BusinessMailbox:[email protected] ZXWTEL：0755-27087743FAX：0755-27087743www.wlsiot.com 1. 1. 1. D D D escription escription escription 1.1Specifications 1.2Antennasize 1.2AntennaPicture AntennasTypePCBantenna2.4GHzapplication Frequency 2.4-2.4835GHz Impedance50Ω PolarizationLinear RadiationpatternOmni-directional VSWR 2.5Max Peakgain +5dBi(type) ConnectorTypew/o CableTypew/o Cablelength w/o 2.4GAntenna ZXWTEL：0755-27087743FAX：0755-27087743www.wlsiot.com 2.PerformanceData 2.1Passivedata ReturnLoss 2.2RadiationPattern ZXWTEL：0755-27087743FAX：0755-27087743www.wlsiot.com Gain