EXHIBIT 10(b) MONTHLY SERVICER'S CERTIFICATE CONSUMERS FUNDING LLC $468,592,000 SECURITIZATION BONDS, SERIES 2001-1 Pursuant to Section 3.05 of the Servicing Agreement dated as of November 8, 2001 (the "Consumers Servicing Agreement") between Consumers Energy Company, as Servicer and Consumers Funding LLC, as Issuer, the Servicer does hereby certify as follows: Capitalized terms used in the Monthly Servicer's Certificate (the "Monthly Certificate") have their respective meanings as set forth in the Servicing Agreement. References herein to certain sections and subsections are references to the respective sections of the Servicing Agreement. Current BILLING MONTH: February 2005 CURRENT BILLING MONTH 2/3/2005 - 3/3/2005 COLLECTION CURVE 100% STANDARD BILLING FOR PRIOR BILLING MONTH Residential Total Billed $192,204,378 Residential SECURITIZATION CHARGE (SC) Billed $ 1,672,241 0.870% Commercial Total Billed $ 93,957,854 Commercial SECURITIZATION CHARGE (SC) Billed $ 1,415,935 1.507% Industrial Total Billed $ 45,180,263 Industrial SECURITIZATION CHARGE (SC) Billed $ 1,288,827 2.853% YTD NET WRITE-OFFS AS A % OF BILLED REVENUE Non-Residential Customer Net Write-offs 0.130% Residential Customer Net Write-offs 0.500% Total Net Write-offs 0.300% AGGREGATE SC COLLECTIONS TOTAL SC REMITTED FOR BILLING MONTH Residential Class SC Collected $ 1,527,538 Commercial Class SC Collected $ 1,346,072 Industrial Class SC Collected $ 1,550,971 Total SC Collected $ 4,424,581 Aggregate SC Remittances for January 2005 BILLING MONTH $ 4,185,102 Aggregate SC Remittances for February 2005 BILLING MONTH $ 4,424,581 Aggregate SC Remittances for March 2005 BILLING MONTH TOTAL CURRENT SC REMITTANCES $ 8,609,683 Page 1 of 3 CURRENT BILLING MONTH 2/3/2005 - 3/3/2005 COLLECTION CURVE 100% CALCULATED SC COLLECTED AMOUNT RESIDENTIAL A-1 Residential SC Collected $ 1,452,928 A-3 Residential T.O.D. SC Collected $ 6,425 A-4 Alternate Residence SC Collected $ 36,278 A-5 Residential Farm/Life Support SC Collected $ 31,907 TOTAL RESIDENTIAL SC COLLECTED $ 1,527,538 COMMERCIAL B-1 General Primary (041) SC Collected $ 21,816 B-General Secondary (010) SC Collected $ 260,516 C- General Secondary (011) SC Collected $ 462,448 D-General Primary (018) SC Collected $ 265,213 F-Primary High Load Factor (032) SC Collected $ 47,419 GH-General Service Heating (013) SC Collected $ 7,357 H- Water Heating Service (014) SC Collected $ 586 L-1 General Energy-Only Street Lighting SC Collected $ 3,051 L-2 General Service (Cust Owned) St Light SC Collected $ 3,130 L-3 General Service (Co Owned) St Light SC Collected $ 16,162 L-4 General Service Outdoor Lighting Commercial SC Collected $ 0 PS-1 General Secondary Public Pumping SC Collected $ 7,923 PS-2 General Primary Public Pumping SC Collected $ 6,049 PS-3 General Optional Primary Public Pumping SC Collected $ 41,050 R-1 General Secondary Resale SC Collected $ 2 R-2 General Secondary Resale SC Collected $ 1,011 R-3 General Primary Resale SC Collected $ 24,040 ROA-P Retail Open Access Primary (110) SC Collected $ 130,466 ROA-S Retail Open Access Secondary Com SC Collected $ 40,724 SC - Special Contract Commercial SC Collected $ 1,895 UR-General Unmetered SC Collected $ 5,214 TOTAL COMMERCIAL SC COLLECTED $ 1,346,072 INDUSTRIAL B-1 General Primary (042) SC Collected $ 17,068 B-General Secondary (020) SC Collected $ 31,455 C- General Secondary (021) SC Collected $ 64,764 CG-Cogeneration/Small Power Production Purchase SC Collected $ 4,003 D-General Primary (028) SC Collected $ 431,095 F-Primary High Load Factor (033) SC Collected $ 57,171 GH-General Service Heating (023) SC Collected $ 83 GMD General Motors SC Collected $ 51,334 GMF General Motors SC Collected $ 95,707 GMF-1 General Motors SC Collected $ 4,576 GMJ-1 General Motors SC Collected $ 5,873 H- Water Heating Service (024) SC Collected $ 2 Page 2 of 3 CURRENT BILLING MONTH 2/3/2005 - 3/3/2005 COLLECTION CURVE 100% I-General Primary Interruptible (034) SC Collected $ 3,554 J-1General Alternative Electric Metal Melting SC Collected $ 30,477 J-General Primary Electric Furnace (037) SC Collected $ 7,760 L-4 General Service Outdoor Lighting Industrial SC Collected $ 1 R-3 General Primary Resale (027) SC Collected $ 1,027 ROA-P Retail Open Access Primary (111) SC Collected $ 420,633 ROA-S Retail Open Access Secondary Ind SC Collected $ 7,959 SC - Special Contract Industrial SC Collected $ 316,429 TOTAL INDUSTRIAL SC COLLECTED $ 1,550,971 TOTAL SC COLLECTED $ 4,424,581 Executed as of this 14th day of March 2005. CONSUMERS ENERGY COMPANY AS SERVICER /s/ Glenn P. Barba ---------------------------------------- Glenn P. Barba, Vice President, Controller and Chief Accounting Officer CC: Consumers Funding LLC One Energy Plaza Jackson, Mi 49201 Page 3 of 3