FCC ID: 2BE2I-FS600B Power optimizer

OnETECH Power optimizer (SolpoMax) FS600B a Input: 8-60Vdc, Max. 15A, Output: 8-60Vdc, Max. 15A aHng NEMA Type 4 Prodiicrienidate 2024-01-17 / 23F2FOD75C FCC ID 2BE2I-FS600B

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This product cannot be opened without permission due to property ownership. Also, do not open it as there is a risk of electrocution. SECTEUR DANGEREUX, RISQUE DE CHOC ELECTRIQUE, NE PAS OUVRIR Ce produit ne peut pas tre ouvert sans autorisation en raison de la proprit. Ne l'ouvrez pas non plus car il existe un risque dlectrocution. First Silicon

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Firstsilicon Section 2.911(d)(5)(i) Certification Equipment Type Company name: Firstsilicon Address: 25, Gasan digital 1-ro, Geumcheon-gu, Seoul, South Korea Product Name: Power optimizer FCC ID: 2BE2I-FS600B Model(s): FS600B 2.911(d)(5)(i) Equipment Type We, Firstsilicon (the applicant) certify that the equipment for which authorization is sought through certification is not:

Prohibited from receiving an equipment authorization pursuant to 2.903; of the FCC rules. Identified as an equipment type in the Covered List NOTE 1 Yours sincerely, Name: Jung ho Hyun Date: March 18, 2024 Title and Company name: engineer / Firstsilicon NOTE 1 Covered List; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References;

1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the 2.911 (d)(5)(i) Equipment Type Attestation v1.2

Firstsilicon Section 2.911(d)(5)(ii) Certification Applicant (Covered List

) Company name: Firstsilicon Address: 25, Gasan digital 1-ro, Geumcheon-gu, Seoul, South Korea Product Name: Power optimizer FCC ID: 2BE2I-FS600B Model(s): FS600B 2.911(d)(5)(ii) Applicant filing We, Firstsilicon (the applicant) certify that, as of the date of the filing of the application, the applicant is is not identified NOTE 1 on the Covered List NOTE 2, established pursuant to 1.50002 of this chapter, as an entity producing covered communications equipment. Yours sincerely, Name: Jung ho Hyun Date: March 18, 2024 Title and Company name: engineer / Firstsilicon NOTE 1 Delete option not applicable to this application. NOTE 2 Covered List; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References;

1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the 2.911 (d)(5)(ii) Applicant Attestation v1.3

Letter of Authorization

: FS600B

: 25, Gasan digital 1-ro, Geumcheon-gu, Seoul, South Korea

: Firstsilicon

: 2BE2I-FS600B

: Power optimizer Company Address Product Name Model Number FCC Identifier We authorize MiCOM Labs Inc, 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the above named equipment. Any individual within MiCOM Labs is authorized to act on our behalf and take action on the application. We declare that MiCOM Labs Inc, 575 Boulder Court, Pleasanton, California 94566, USA, is allowed to forward all information related to the approval project to the Federal Communication Commission and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Name: Jung ho Hyun Title: engineer Date: March 18, 2024 Signature of applicant:

Firstsilicon Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: March 18, 2024 Subject; Request for Confidentiality FCC ID: 2BE2I-FS600B To Whom It May Concern, Pursuant to the provisions of the Commissions rules Title 47 Sections 0.457 and 0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description Tune-up Procedure In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR 2.803 and the importation rules in Title 47 CFR 2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s);

External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature:

Name: Jung ho Hyun Title: engineer

Certification designating a U.S. Agent for service of process:

As required by section 2.911(d)(7), the applicant must designate a contact located in the United States for purposes of acting as the applicants agent for service of process, regardless of whether the applicant is a domestic or foreign entity. An applicant located in the United States may designate itself as the agent for service of process. In either scenario, the designation of the U.S. agent for service of process should be provided as an attachment to the equipment authorization application. The applicant must provide a written certification, which must:

i. Be signed by both the applicant and designated agent for service of process, if the agent is ii. Acknowledge the applicants consent and the designated agents obligation to accept service different from the applicant. of process. iii. Provide a physical U.S. address and email for the designated agent. iv. Acknowledge the applicants acceptance to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. Unofficial information provided by FCC personnel on February 14, 2023, via the monthly call with the TCB Council:

The Agent for Process of Service:

cannot be a TCB or affiliated with a TCB (e.g. could not be a person who works for a TCB or a company that owns or is owned by the TCB) cannot be a [FCC recognised] Lab or affiliated with a test lab (e.g. could not be a person who works for a Lab or a company that owns or is owned by the Lab) Agent can be Individual Entity or a Company Entity Agent Entity must be located in US, US address/phone Entity acting as Agent must have FRN (best practice, put FRN on Agent Letter) Agent letter does not have to be FCC ID specific, can be general Agent for Grantee For devices being marketed or for which marketing has ceased for less than 1 year, if the Agent for Process of Service changes, then for every TC Number the TCB must request the FCC to put application into Audit Mode and Agent Letter needs to be updated (superseded). NOTE: The U.S. Agent for Service of Process should not be confused with the authorized agent used for signing the 731 form, other cover letters within the application, and/or the agent who may interface with the TCB. U.S. Agent Designation for Service of Process ATTENTION:

Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA REGARDING: FCC Certification Section 2.911(d)(7) Information Designated U.S. Agent Company Name: Approve-IT, Inc. Contact Name: Nathan Grinager Street Address: 8011 34th Ave South, Suite 342 City/Province/Zip: Bloomington, MN 55425 Telephone No: 651-247-1678 Email: team@approve-it.net FRN #: 0027533835 This letter is to confirm that we (the Designated U.S. Agent) have accepted the responsibility to act as the Designated U.S. Agent for Service of Process as required by section 47 CFR 2.911(d)(7) on behalf of the Applicant noted below. U.S. Agent Signature:

Date: March 15, 2024 Signed by (Printed Name/Title): Nathan Grinager / Co-President

*This letter is valid indefinitely for all applications submitted within the period of 3/15/2024 3/14/2025 The Applicant confirms its explicit consent and acknowledges that they must maintain an agent for no less than one year after terminating all marketing and importation OR the conclusion of any Commission-related proceeding involving the equipment. The applicant further acknowledges their responsibility to inform the FCC whenever the Designated U.S. Agent information above changes. Applicant Company name: Firstsilicon Grantee FRN: 0034944157 Grantee Code: 2BE2I Contact Name: Jung ho Hyun Street Address: 25, Gasan digital 1-ro, Geumcheon-gu, City/Province/Zip: Seoul, South Korea Telephone No: +82-10-4408-5610 Email: jhhyun@firstsilicon.co.kr Applicant Signature:

Date: March 15, 2024 Signed by (Printed Name/Title): Jung ho Hyun / Engineer