<?xml version="1.0" encoding="us-ascii"?><InstanceReport xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><Version>2.2.0.25</Version><hasSegments>false</hasSegments><hasScenarios>false</hasScenarios><ReportLongName>006110 - Disclosure - Electric Customer Credits</ReportLongName><DisplayLabelColumn>true</DisplayLabelColumn><ShowElementNames>false</ShowElementNames><RoundingOption /><HasEmbeddedReports>false</HasEmbeddedReports><Columns><Column><Id>1</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelColumn>false</LabelColumn><CurrencyCode /><FootnoteIndexer /><hasSegments>false</hasSegments><hasScenarios>false</hasScenarios><MCU><KeyName>1/1/2010 - 12/31/2010
</KeyName><CurrencySymbol /><contextRef><ContextID>c00052</ContextID><EntitySchema>http://www.sec.gov/CIK</EntitySchema><EntityValue>0001089819</EntityValue><PeriodDisplayName /><PeriodType>duration</PeriodType><PeriodStartDate>2010-01-01T00:00:00</PeriodStartDate><PeriodEndDate>2010-12-31T00:00:00</PeriodEndDate><Segments /><Scenarios /></contextRef><UPS /><CurrencyCode /><OriginalCurrencyCode /></MCU><CurrencySymbol /><Labels><Label Id="1" Label="12 Months Ended" /><Label Id="2" Label="Dec. 31, 2010" /></Labels></Column></Columns><Rows><Row><Id>2</Id><IsAbstractGroupTitle>true</IsAbstractGroupTitle><Level>0</Level><ElementName>cnl_NotesToFinancialStatementsAbstract</ElementName><ElementPrefix>cnl</ElementPrefix><IsBaseElement>false</IsBaseElement><BalanceType>na</BalanceType><PeriodType>duration</PeriodType><ShortDefinition>No definition available.</ShortDefinition><IsReportTitle>false</IsReportTitle><IsSegmentTitle>false</IsSegmentTitle><IsSubReportEnd>false</IsSubReportEnd><IsCalendarTitle>false</IsCalendarTitle><IsTuple>false</IsTuple><IsEquityPrevioslyReportedAsRow>false</IsEquityPrevioslyReportedAsRow><IsEquityAdjustmentRow>false</IsEquityAdjustmentRow><IsBeginningBalance>false</IsBeginningBalance><IsEndingBalance>false</IsEndingBalance><IsReverseSign>false</IsReverseSign><PreferredLabelRole /><FootnoteIndexer /><Cells><Cell><Id>1</Id><IsNumeric>false</IsNumeric><IsRatio>false</IsRatio><DisplayZeroAsNone>false</DisplayZeroAsNone><NumericAmount>0</NumericAmount><RoundedNumericAmount>0</RoundedNumericAmount><NonNumbericText /><NonNumericTextHeader /><FootnoteIndexer /><CurrencyCode /><CurrencySymbol /><IsIndependantCurrency>false</IsIndependantCurrency><ShowCurrencySymbol>false</ShowCurrencySymbol><DisplayDateInUSFormat>false</DisplayDateInUSFormat><hasSegments>false</hasSegments><hasScenarios>false</hasScenarios></Cell></Cells><OriginalInstanceReportColumns /><Unit>Other</Unit><ElementDataType>xbrli:stringItemType</ElementDataType><SimpleDataType>string</SimpleDataType><ElementDefenition>No definition available.</ElementDefenition><IsTotalLabel>false</IsTotalLabel><IsEPS>false</IsEPS><Label>Notes to the Financial Statements [Abstract]</Label></Row><Row><Id>3</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><Level>0</Level><ElementName>cnl_ElectricCustomerCreditsTextBlock</ElementName><ElementPrefix>cnl</ElementPrefix><IsBaseElement>false</IsBaseElement><BalanceType>na</BalanceType><PeriodType>duration</PeriodType><ShortDefinition>Describes the estimated refund due to customers as a result of regulated earnings exceeding the established target return on...</ShortDefinition><IsReportTitle>false</IsReportTitle><IsSegmentTitle>false</IsSegmentTitle><IsSubReportEnd>false</IsSubReportEnd><IsCalendarTitle>false</IsCalendarTitle><IsTuple>false</IsTuple><IsEquityPrevioslyReportedAsRow>false</IsEquityPrevioslyReportedAsRow><IsEquityAdjustmentRow>false</IsEquityAdjustmentRow><IsBeginningBalance>false</IsBeginningBalance><IsEndingBalance>false</IsEndingBalance><IsReverseSign>false</IsReverseSign><PreferredLabelRole>terselabel</PreferredLabelRole><FootnoteIndexer /><Cells><Cell><Id>1</Id><IsNumeric>false</IsNumeric><IsRatio>false</IsRatio><DisplayZeroAsNone>false</DisplayZeroAsNone><NumericAmount>0</NumericAmount><RoundedNumericAmount>0</RoundedNumericAmount><NonNumbericText>&lt;div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: left" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 9pt; FONT-FAMILY: Helvetica LT Std Cond, sans-serif"&gt;Note 11 &amp;#8212; Electric Customer Credits &lt;/font&gt; &lt;div&gt;&lt;hr style="COLOR: black" align="left" width="100%" noshade="noshade" size="1" /&gt;&lt;/div&gt;&lt;/div&gt;&lt;div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: left"&gt;&lt;div style="DISPLAY: block; TEXT-INDENT: 0pt"&gt;&lt;font style="DISPLAY: inline; FONT-SIZE: 9pt; FONT-FAMILY: Helvetica LT Std Light, sans-serif"&gt;In January 2010, Cleco Power filed its monitoring report for the 12-month period ended September 30, 2009.&amp;#160;&amp;#160;The Staff issued its preliminary report in June 2010, which indicated that no customer refunds were due for this period.&amp;#160;&amp;#160;On December 17, 2010, the Administrative Law Judge officially closed this docket.&lt;/font&gt;&lt;/div&gt;&lt;/div&gt;&lt;div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: left" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-SIZE: 9pt; FONT-FAMILY: Helvetica LT Std Light, sans-serif"&gt;Beginning in 2010, the amount of Cleco Power&amp;#8217;s yearly retail earnings is subject to the terms of a FRP established by the LPSC.&amp;#160;&amp;#160;The new rates and the FRP became effective upon commencement of commercial operations at Madison Unit 3 on February 12, 2010.&amp;#160;&amp;#160;The 2010 FRP establishes a target return on equity and requires all or a portion of regulated earnings for each yearly review period above the targeted regulatory rate of return on equity to be credited to Cleco Power&amp;#8217;s customers. The 2010 FRP allows Cleco Power the opportunity to earn a target return on equity of 10.7%, including returning to retail customers 60% of retail earnings between 11.3% and 12.3% and all retail earnings over 12.3%. The amount of credits due customers, if any, is determined by Cleco Power and the LPSC annually. The 2010 FRP establishes that Cleco Power file monitoring reports for both the 12 months ended June 30, 2010, and September 30, 2010, on or before October 31, 2010, and January 31, 2011, respectively. Beginning in 2011, Cleco Power will file annual monitoring reports no later than October 31 for the 12-month period ending June 30.&lt;/font&gt;&lt;/div&gt;&lt;div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: left" align="left"&gt;&lt;div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-SIZE: 9pt; FONT-FAMILY: Helvetica LT Std Light, sans-serif"&gt;&lt;font style="DISPLAY: inline; FONT-SIZE: 9pt; FONT-FAMILY: Helvetica LT Std Light, sans-serif"&gt;On October 29, 2010, Cleco Power filed its report for the 12 months ended June 30, 2010, which indicated that no &lt;/font&gt;&lt;font style="DISPLAY: inline; FONT-SIZE: 9pt; FONT-FAMILY: Helvetica LT Std Light, sans-serif"&gt;refund was due for this period.&amp;#160;&amp;#160;On January 28, 2011, Cleco Power filed its report for the 12 months ended September 30, 2010, which indicated that Cleco Power&amp;#8217;s retail earnings exceeded the refund threshold of 11.3%, but were less than 12.3%.&amp;#160;&amp;#160;As of December 31, 2010, Cleco Power had accrued $9.6 million to be refunded to customers based on results for the 12-month period ending September 30, 2010.&amp;#160;&amp;#160;The ultimate amount of any customer refund is subject to LPSC Staff review and the closure of such review.&amp;#160;&amp;#160;Credits are typically included on customers&amp;#8217; bills the following summer, but the timing of the refunds is ultimately at the discretion of the LPSC.&lt;/font&gt;&lt;/font&gt;&lt;/div&gt;&lt;/div&gt;&lt;div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: left" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-SIZE: 9pt; FONT-FAMILY: Helvetica LT Std Light, sans-serif"&gt;Cleco Power&amp;#8217;s Consolidated Balance Sheets at December 31, 2010, and 2009 reflect the following accruals for estimated electric customer credits.&lt;/font&gt;&lt;/div&gt;&lt;div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: left"&gt;&lt;br /&gt;&lt;/div&gt;&lt;div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: left"&gt;&lt;table cellspacing="0" cellpadding="0" width="100%"&gt;&lt;tr&gt;&lt;td style="BORDER-TOP: black 0.5pt solid; PADDING-BOTTOM: 2px" valign="bottom"&gt;&lt;font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;td style="BORDER-TOP: black 0.5pt solid; BORDER-BOTTOM: black 2px solid" valign="bottom" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-SIZE: 6pt; FONT-FAMILY: helvetica lt std cond light, sans-serif"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;&lt;td style="BORDER-TOP: black 0.5pt solid; BORDER-BOTTOM: black 2px solid; TEXT-ALIGN: right" valign="bottom" colspan="6"&gt;&lt;div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: right"&gt;&lt;font style="DISPLAY: inline; FONT-SIZE: 6pt; FONT-FAMILY: helvetica lt std cond light, sans-serif"&gt;&lt;font style="MARGIN-LEFT: 12pt"&gt;&lt;/font&gt;AT DECEMBER 31,&lt;/font&gt;&lt;/div&gt;&lt;/td&gt;&lt;td style="BORDER-TOP: black 0.5pt solid; BORDER-BOTTOM: black 2px solid; TEXT-ALIGN: left" valign="bottom" nowrap="nowrap"&gt;&lt;font style="DISPLAY: inline; FONT-SIZE: 6pt; FONT-FAMILY: helvetica lt std cond light, sans-serif"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td style="BORDER-BOTTOM: black 2px solid" valign="bottom" align="left"&gt;&lt;div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-SIZE: 6pt; FONT-FAMILY: helvetica lt std cond light, sans-serif"&gt;(THOUSANDS)&lt;/font&gt;&lt;/div&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 2px solid" valign="bottom" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 6pt; FONT-FAMILY: helvetica lt std cond, sans-serif"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 2px solid; TEXT-ALIGN: right" valign="bottom" colspan="2"&gt;&lt;div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: right"&gt;&lt;font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 6pt; FONT-FAMILY: helvetica lt std cond, sans-serif"&gt;&lt;font style="MARGIN-LEFT: 12pt"&gt;&lt;/font&gt;2010&lt;/font&gt;&lt;/div&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 2px solid; TEXT-ALIGN: left" valign="bottom" nowrap="nowrap"&gt;&lt;font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 6pt; FONT-FAMILY: helvetica lt std cond, sans-serif"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 2px solid" valign="bottom" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-SIZE: 6pt; FONT-FAMILY: helvetica lt std cond light, sans-serif"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 2px solid; TEXT-ALIGN: right" valign="bottom" colspan="2"&gt;&lt;div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: right"&gt;&lt;font style="DISPLAY: inline; FONT-SIZE: 6pt; FONT-FAMILY: helvetica lt std cond light, sans-serif"&gt;&lt;font style="MARGIN-LEFT: 12pt"&gt;&lt;/font&gt;2009&lt;/font&gt;&lt;/div&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 2px solid; TEXT-ALIGN: left" valign="bottom" nowrap="nowrap"&gt;&lt;font style="DISPLAY: inline; FONT-SIZE: 6pt; FONT-FAMILY: helvetica lt std cond light, sans-serif"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr bgcolor="#cceeff"&gt;&lt;td style="BORDER-BOTTOM: black 2px solid" valign="bottom" align="left" width="76%"&gt;&lt;div style="DISPLAY: block; MARGIN-LEFT: 9pt; TEXT-INDENT: -9pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: helvetica lt std cond light, sans-serif"&gt;Provision for rate refund&lt;/font&gt;&lt;/div&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 2px solid" valign="bottom" align="left" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 8pt; FONT-FAMILY: helvetica lt std cond, sans-serif"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 2px solid; TEXT-ALIGN: left" valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 8pt; FONT-FAMILY: helvetica lt std cond, sans-serif"&gt;$&lt;/font&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 2px solid; TEXT-ALIGN: right" valign="bottom" width="9%"&gt;&lt;font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 8pt; FONT-FAMILY: helvetica lt std cond, sans-serif"&gt;&lt;font style="MARGIN-LEFT: 1.45pt"&gt;&lt;/font&gt;&lt;font style="MARGIN-LEFT: 12pt"&gt;&lt;/font&gt;9,598&lt;/font&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 2px solid; TEXT-ALIGN: left" valign="bottom" nowrap="nowrap" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 8pt; FONT-FAMILY: helvetica lt std cond, sans-serif"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 2px solid" valign="bottom" align="left" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: helvetica lt std cond light, sans-serif"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 2px solid; TEXT-ALIGN: left" valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: helvetica lt std cond light, sans-serif"&gt;$&lt;/font&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 2px solid; TEXT-ALIGN: right" valign="bottom" width="9%"&gt;&lt;font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: helvetica lt std cond light, sans-serif"&gt;&lt;font style="MARGIN-LEFT: 3.6pt"&gt;&lt;/font&gt;&lt;font style="MARGIN-LEFT: 12pt"&gt;&lt;/font&gt;2&lt;/font&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 2px solid; TEXT-ALIGN: left" valign="bottom" nowrap="nowrap" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: helvetica lt std cond light, sans-serif"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr bgcolor="white"&gt;&lt;td style="BORDER-BOTTOM: black 4px double" valign="bottom" align="left" width="76%"&gt;&lt;div style="DISPLAY: block; MARGIN-LEFT: 9pt; TEXT-INDENT: -9pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: helvetica lt std cond light, sans-serif"&gt;&lt;font style="MARGIN-LEFT: 7.2pt"&gt;&lt;/font&gt;Total customer credits&lt;/font&gt;&lt;/div&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 4px double" valign="bottom" align="left" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 8pt; FONT-FAMILY: helvetica lt std cond, sans-serif"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 4px double; TEXT-ALIGN: left" valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 8pt; FONT-FAMILY: helvetica lt std cond, sans-serif"&gt;$&lt;/font&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 4px double; TEXT-ALIGN: right" valign="bottom" width="9%"&gt;&lt;font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 8pt; FONT-FAMILY: helvetica lt std cond, sans-serif"&gt;&lt;font style="MARGIN-LEFT: 1.45pt"&gt;&lt;/font&gt;&lt;font style="MARGIN-LEFT: 12pt"&gt;&lt;/font&gt;9,598&lt;/font&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 4px double; TEXT-ALIGN: left" valign="bottom" nowrap="nowrap" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 8pt; FONT-FAMILY: helvetica lt std cond, sans-serif"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 4px double" valign="bottom" align="left" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: helvetica lt std cond light, sans-serif"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 4px double; TEXT-ALIGN: left" valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: helvetica lt std cond light, sans-serif"&gt;$&lt;/font&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 4px double; TEXT-ALIGN: right" valign="bottom" width="9%"&gt;&lt;font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: helvetica lt std cond light, sans-serif"&gt;&lt;font style="MARGIN-LEFT: 3.6pt"&gt;&lt;/font&gt;&lt;font style="MARGIN-LEFT: 12pt"&gt;&lt;/font&gt;2&lt;/font&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 4px double; TEXT-ALIGN: left" valign="bottom" nowrap="nowrap" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: helvetica lt std cond light, sans-serif"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: left" align="justify"&gt;&amp;#160;&lt;/div&gt;</NonNumbericText><NonNumericTextHeader>Note 11 &amp;#8212; Electric Customer Credits  In January 2010, Cleco Power filed its monitoring report for the 12-month period ended September 30,</NonNumericTextHeader><FootnoteIndexer /><CurrencyCode /><CurrencySymbol /><IsIndependantCurrency>false</IsIndependantCurrency><ShowCurrencySymbol>false</ShowCurrencySymbol><DisplayDateInUSFormat>false</DisplayDateInUSFormat><hasSegments>false</hasSegments><hasScenarios>false</hasScenarios></Cell></Cells><OriginalInstanceReportColumns /><Unit>Other</Unit><ElementDataType>us-types:textBlockItemType</ElementDataType><SimpleDataType>string</SimpleDataType><ElementDefenition>Describes the estimated refund due to customers as a result of regulated earnings exceeding the established target return on equity.</ElementDefenition><ElementReferences>No authoritative reference available.</ElementReferences><IsTotalLabel>false</IsTotalLabel><IsEPS>false</IsEPS><Label>Electric Customer Credits</Label></Row></Rows><Footnotes /><NumberOfCols>1</NumberOfCols><NumberOfRows>2</NumberOfRows><ReportName>Electric Customer Credits</ReportName><MonetaryRoundingLevel>UnKnown</MonetaryRoundingLevel><SharesRoundingLevel>UnKnown</SharesRoundingLevel><PerShareRoundingLevel>UnKnown</PerShareRoundingLevel><ExchangeRateRoundingLevel>UnKnown</ExchangeRateRoundingLevel><HasCustomUnits>false</HasCustomUnits><SharesShouldBeRounded>true</SharesShouldBeRounded></InstanceReport>
