HAWAII ELECTRIC LIGHT COMPANY, INC. ENERGY COST ADJUSTMENT FACTOR

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2 ATTACHMENT 1 Revised 6/1/18 HAWAII ELECTRIC LIGHT COMPANY, INC. ENERGY COST ADJUSTMENT FACTOR EFFECTIVE DATES 5/1/18 6/1/18 Change Composite Cost Generation, /mmbtu 1, , Dispersed Generation Energy, /kwh Purchased Energy, /kwh Residential Schedule "R" Energy Cost Adjustment - /kwh (.452) Others - "G,J,P,F" Energy Cost Adjustment - /kwh (.452) Residential Customer with: 5 KWH Consumption - $/Bill $ $ $ KWH Consumption - $/Bill $28.9 $ $14.73

3 ATTACHMENT 2 SHEET 1 OF 2 ENERGY COST ADJUSTMENT (ECA) FILING - June 1, 218 (Page 1 of 2) Line 1 Effective Date June 1, Supercedes Factors of May 1, 218 HAWAII ELECTRIC LIGHT COMPANY, INC. ENERGY COST ADJUSTMENT (ECA) FILING GENERATION COMPONENT 15a 17a CENTRAL STATION WITH WIND/HYDRO COMPONENT FUEL PRICES, /mmbtu 3 4 Hill Industrial 1, Puna Industrial 1, Keahole Diesel 1, a Keahole ULSD 1, Waimea ULSD Diesel 1, Hilo Diesel 1, a Hilo (Kanoelehua) ULSD Diesel 1 1, Puna Diesel 1, Wind 11 Hydro BTU MIX, % Hill Industrial Puna Industrial Keahole Diesel Keahole ULSD Waimea ULSD Diesel Hilo Diesel 62 Hilo (Kanoelehua) ULSD Diesel Puna Diesel Wind 2 Hydro COMPOSITE COST OF GENERATION, CENTRAL STATION + WIND/HYDRO /mmb 1, % Input to System kwh Mix DG ENERGY COMPONENT COMPOSITE COST OF DG ENERGY, /kwh % Input to System kwh Mix WEIGHTED COMPOSITE DG ENERGY COST, /kwh (Lines 35 x 36) BASE DG ENERGY COMPOSITE COS Base % Input to System kwh Mix WEIGHTED BASE DG ENERGY COST, /kwh (Line 38 x 39) Cost Less Base (Line 37-4) Loss Factor Revenue Tax Req Multiplier DG FACTOR, /kwh (Line 41 x 42 x 43) EFFICIENCY FACTOR, mmbtu/kwh (A) (B) (C) (D) Percent of Eff Factor Centrl Stn + Weighted Fuel Type mmbtu/kwh Wind/Hydro Eff Factor 23 Industrial Diesel Other (Lines 23, 24, 25): Col(B) x Col(C) = Col(D) 26 Weighted Efficiency Factor, mmbtu/kwh [Lines 23(D) + 24(D) + 25(D)] WEIGHTED COMPOSITE CENTRAL STATION + WIND/HYDRO GENERATION COST, /kwh (Lines (21 x 22 x 26)) BASE CENTRAL STATION + WIND/HYDRO GENERATION COST, /mmbtu 1, Base % Input to Sys kwh Mix Efficiency Factor, mmbtu/kwh WEIGHTED BASE CENTRAL STATION + WIND/HYDRO GENERATION COST /kwh (Lines (28 x 29 x 3)) COST LESS BASE (Line 27-31) Revenue Tax Req Multiplier CENTRAL STATION + WIND/HYDRO GENERATION FACTOR, /kwh (Line (32 x 33)) SUMMARY OF TOTAL GENERATION FACTOR, /kwh Cntrl Stn+Wind/Hydro (line 34) DG (line 44) TOTAL GENERATION FACTOR, /kwh (lines ) Hilo ULSD same location as Kanoelehua ULSD $HELCO ECAC eff filed with Junr 218 budget WITH price update v1 to filerev RBA.xlsm

4 ATTACHMENT 2 SHEET 2 OF 2 ENERGY COST ADJUSTMENT (ECA) FILING - June 1, 218 (Page 2 of 2) HAWAII ELECTRIC LIGHT COMPANY, INC. ENERGY COST ADJUSTMENT (ECA) FILING Line PURCHASED ENERGY COMPONENT PURCHASED ENERGY PRICE, /kwh 48 HEP PGV On Peak PGV Off Peak PGV - Add'l 5 MW On Peak PGV - Add'l 5 MW Off Peak PGV - Add'l 8 MW On Peak PGV - Add'l 8 MW Off Peak Wailuku Hydro On Peak Wailuku Hydro Off Peak Hawi Renewable Dev. On Peak Hawi Renewable Dev. Off Peak Tawhiri (Pakini Nui) On Peak Tawhiri (Pakini Nui) Off Peak Small Hydro (>1 KW) On Peak Small Hydro (>1 KW) Off Peak Sch Q Hydro (<1 KW) FIT 23.8 PURCHASED ENERGY KWH MIX, % 66 HEP PGV On Peak 68 PGV Off Peak 69 PGV - Addt'l On Peak 7 PGV - Addt'l Off Peak 71 PGV - Add'l 8 MW On Peak 72 PGV - Add'l 8 MW Off Peak 73 Wailuku Hydro On Peak Wailuku Hydro Off Peak Hawi Renewable Dev. On Peak Hawi Renewable Dev. Off Peak Tawhiri (Pakini Nui) On Peak Tawhiri (Pakini Nui) Off Peak Small Hydro (>1 KW) On Peak 81 Small Hydro (>1 KW) Off Peak 82 Sch Q Hydro (<1 KW) FIT COMPOSITE COST OF PURCHASED ENERGY, /kwh % Input to System kwh Mix WEIGHTED COMPOSITE PURCHASED ENERGY COST, /kwh (Lines (84 x 85)) BASE PURCHASED ENERGY COMPOSITE COST, /kwh Base % Input to Sys kwh Mix WEIGHTED BASE PURCHASED ENERGY COST, /kwh (Lines (87 x 88)) COST LESS BASE (Lines (86-89)) (.27863) 91 Loss Factor Revenue Tax * PURCHASED ENERGY FACTOR, /kwh (.32628) (Lines (9 x 91 x 92)) Line SYSTEM COMPOSITE 94 GENERATION AND PURCHASED ENERGY FACTOR, /kwh (Lines ( )) 95 Not Used 96 Not Used 97 ECA Reconciliation Adjustment 98 ECA FACTOR, /kwh (Lines ( )) (.499) 2.31 $HELCO ECAC eff filed with Junr 218 budget WITH price update v1 to filerev RBA.xlsm

5 ATTACHMENT 3 SHEET 1 OF 1 Hawaii Electric Light Company, Inc. FUEL OIL INVENTORY PRICES FOR June 1, 218 INDUSTRIAL FUEL COSTS: HILO PUNA Average Industrial Fuel Cost - $/BBL Land Transportation Cost - $/BBL Industrial Costs For Filing - $/BBL Conversion Factors - mmbtu/bbl Industrial Costs For Filing - /mmbtu 1, , DIESEL FUEL COSTS: KEAHOLE PUNA CT-3 HILO Average Diesel Fuel Cost - $/BBL Land Transportation Cost - $/BBL Diesel Costs For Filing - $/BBL Conversion Factors - mmbtu/bbl Diesel Costs For Filing - /mmbtu 1, , , DISPERSED ULSD FUEL COSTS: KEAHOLE WAIMEA HILO GENERATION Average ULSD Fuel Cost - $/BBL Land Transportation Cost - $/BBL ULSD Costs For Filing - $/BBL Conversion Factors - mmbtu/bbl ULSD Costs For Filing - /mmbtu 1, , , , Dispersed Generation, cents per kwh COMPOSITE COST OF DISP. GEN. BBls Fuel: $/BBl Inv Cost: Fuel $ (Prod Sim Consumption x Unit Cost) 17, Net kwh (from Prod Sim) 719, cents/kwh:

6 ATTACHMENT 3 SHEET 2 OF 1 HAWAII ELECTRIC LIGHT CO., INC. Estimated Weighted Average May 218 SHIPMAN INDUSTRIAL HILL INDUSTRIAL BBL COST BBL COST COST PER BARREL EXCL LT LT Total Balance at 4/3/218 31,362 1,971, Less: Est'd Inventory Addn Purchases: Estimate Transfers out: Estimate xxxxxx xxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxx xxxxxxxx xxxxxxxxxxxxxxx xxxxxxxx xxxxxxxxxxxxxxx xxxxxxxx xxxxxxxxxxxxxxx xxxxxxxx xxxxxxxxxxxxxxx Transfers in: Estimate (25,755) 28,854 (1,581,83.3) 1,77, Consumed: Estimate 29,648 (29,591) 1,818,1.47 (1,789,85.8) Balance Per G/L 4/3/218 34,518 2,188,14 Purchases xxxxxx xxxxxxxxxxxxxxxx xxxxxxxx xxxxxxxxxxxxxxx Transfer out xxxxxx xxxxxxxxxxxxxxxx xxxxxxxx xxxxxxxxxxxxxxx Transfer in 34,717 2,39, Consumed (33,71) (2,148,823.72) /31/218 Inv From Offsite/Transfers Est'd Inventory Addition 35,525 2,348,773.6 Fuel 5/31/218 35,525 2,348,773.6 Reverse Fuel Balance Fuel Avg Price xxxxxx xxxxxx xxxxxxxx xxxxxxxx (2,348,773.6) 2,46, /1/218 Avg Price 35,525 2,46, Weighted Avg Cost/BBL by Location #DIV/! Weighted Avg Avg Cost #DIV/!

7 ATTACHMENT 3 SHEET 3 OF 1 HAWAII ELECTRIC LIGHT CO., INC. Estimated Weighted Average May 218 PUNA INDUSTRIAL LAND COST PER BARREL BBL COST TRANSP EXCLUDE LT LT TOTAL Balance at 4/3/218 5,19 357, , Less: Est'd Inventory Addition Purchases: Estimate Transfers out: Estimate xxxxxxxxxxxx xxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxx Transfers in: Estimate (1,639) (13,358.56) (1,959.82) 1,62 12, , Consumed: Estimate 2, ,44.1 3,37.59 (2,346) (184,18.75) (2,876.6) Balance Per G/L 4/3/218 5, , ,84.31 Purchases Transfer out xxxxxxxxxxxx xxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxx Transfer in 5, ,16 6, Consumed (4,329) (275,949.51) (5,51.73) /31/218 6, , , Inventory From Offsite/Transfers Est'd Inventory Addition Fuel Avg Price 6, , , Reverse Fuel Balance xxxxxxxxxxxx (415,265.75) xxxxxxxxxxxxxxxxxxxxx Fuel Avg Price xxxxxxxxxxxx 427,55.62 xxxxxxxxxxxxxxxxxxxxx 6/1/218 Avg Price 6, , , Weighted Avg Cost/BBL by Location Weighted Avg Avg Cost

8 ATTACHMENT 3 SHEET 4 OF 1 HAWAII ELECTRIC LIGHT CO., INC. Estimated Weighted Average May 218 HS Diesel BBL KEAHOLE CT GALLONS COST EXCLUDE LT LAND TRANSP COST PER EXCLUD LT BARREL LT TOTAL Balance at 4/3/218 5,8.5 2,1,356. 4,626, ,194.9 Less: Est'd Inventory Addition Purchases: Estimate Transfers out: Estimate xxxxxxxxxxxxxxx xxxxxxxxxxxxxxx xxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxx Transfers in: Estimate (47,319.7) 42,21 (1,987,428.) 1,772,821. (4,42,246.) 3,827,72.6 (134,548.9) 118,453.2 Consumed: Estimate 44,312. (43,487.2) 1,861,14. (1,826,464.) 3,82,47.4 (3,63,174.7) 124, (122,526.1) Balance Per G/L 4/3/218 45, ,92,389 4,241, , Purchases Transfer out xxxxxxxxxxxx xxxxxxxxxxxxxxx xxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxxxxx xxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxx Transfer in 4,85.7 1,713,839. 3,955, , Consumed (39,76.7) (1,669,95) (3,731,197.1) (111,465.19) /31/218 Inventory From Offsite/Transfers Est'd Inventory Addition 46, ,964,278 4,465, , Fuel Avg Price 46, ,964,278 4,465, , Reverse Fuel Balance Fuel Avg Price xxxxxxxxxxxx xxxxxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxxxxx (4,465,839.9) xxxxxxxxxxxxxxxxxx 4,813,56.5 xxxxxxxxxxxxxxxxxx 6/1/218 Avg Price 46, ,964,278 4,813, , Weighted Avg Cost/BBL by Location Weighted Avg Avg Cost

9 ATTACHMENT 3 SHEET 5 OF 1 HAWAII ELECTRIC LIGHT CO., INC. Estimated Weighted Average May 218 PUNA CT-3 COST LAND COST PER BARREL HS Diesel BBL GALLONS EXCLUD LT TRANSP EXCL LT LT TOTAL Balance at 4/3/218 3, , ,42.4 4,897.8 Less: Est'd Inven Addition Purchases: Estimate Transfers out: Estimate xxxxxxxxxxxxxxxxx xxxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxxxxxxx xxxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxxxxxxx xxxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxxxxxxx xxxxxxxxxxxxx xxxxxxxxxxxx Transfers in: Estimate (1,26.6) (43,118.) (97,12.1) (1,138.3) , , ,44.6 Consumed: Estimate 1, ,37. 19, ,729.2 (887.9) (37,29) (134,82.1) (1,29.6) Balance Per G/L 4/3/218 3, ,28 345, , Purchases Transfer out xxxxxxxxxxxx xxxxxxxxxxxxxxxxx xxxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxxxxxxx xxxxxxxxxxxxx xxxxxxxxxxxx Transfer in 5, , , , Consumed (3,723.7) (156,396) (349,438.19) (5,22.55) /31/218 5, , ,545. 6, Inven From Offsite/Transfers Est'd Inventory Addition Fuel 5/31/218 5, , ,545. 6, Reverse Fuel Balance xxxxxxxxxxxx xxxxxxxxxxxxxxxxx (549,545.) xxxxxxxxxxxx Fuel Avg Price xxxxxxxxxxxx xxxxxxxxxxxxxxxxx 569,473.4 xxxxxxxxxxxx 6/1/218 Avg Price 5, , , , Weighted Avg Cost/BBL by Location Weighted Avg Avg Cost

10 ATTACHMENT 3 SHEET 6 OF 1 HAWAII ELECTRIC LIGHT CO., INC. Estimated Weighted Average May 218 HS Diesel BBL TOTAL HILO HS-DIESEL COST GALLONS EXCLUDE LT LAND TRANSP COST PER EXCL LT BARREL LT TOTAL Balance at 4/3/ , ,499 1,648 Less: Est'd Inven Addition Purchases: Estimate Transfers out: Estimate xxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxx Transfers in: Estimate Consumed: Estimate Balance Per G/L 4/3/ , , , Purchases Transfer out xxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxx Transfer in Consumed /31/218 Inven From Offsite/Transfers Est'd Inventory Addition 1, , , , Fuel Avg Price 1, , , , Reverse Fuel Balance Fuel Avg Price xxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxx -132, xxxxxxxxxxxx 147,37.43 xxxxxxxxxxxx 6/1/218 Avg Price 1, , , , Weighted Avg Cost/BBL by Location Weighted Avg Avg Cost

11 ATTACHMENT 3 SHEET 7 OF 1 HAWAII ELECTRIC LIGHT CO., INC. Estimated Weighted Average May 218 ULSD BBL KEAHOLE DIESEL COST GALLONS EXCLUDE LT LAND TRANSP COST PER BARREL EXCLUD LT LT TOTAL Balance at 4/3/218 2, ,92 164, ,655.5 Less: Est'd Inventory Addition Purchases: Estimate Act ual 81.8 Transfers out: Estimate A ctual xxxxxxxxxxxx xxxxxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxxxxx xxxxxxxxxxxx Transfers in: Estimate A ctual 59 (85) 3.99 Consumed: Estimate Act ual 14.8 (99.6) 4,41 (4,184) 8, (7,32.27) (347.51) Balance Per G/L 4/3/218 2,26. 85,93 166, , Purchases ,845 17, Estimated Purchases Transfer in Consumed (126.2) (5,31) (1,393.7) (353.8) /31/218 2,91. 87, , , Inventory From Offsite/Transfers Est'd Inventory Addition Fuel Avg Price 2,91. 87, , , Reverse Fuel Balance xxxxxxxxxxxx xxxxxxxxxxxx (173,427.13) xxxxxxxxxxxx Fuel Avg Price xxxxxxxxxxxx xxxxxxxxxxxx 176,66.34 xxxxxxxxxxxx 6/1/218 Avg Price 2,91. 87, , , Weighted Avg Cost/BBL by Location Weighted Avg Avg Cost

12 ATTACHMENT 3 SHEET 8 OF 1 HAWAII ELECTRIC LIGHT CO., INC. Estimated Weighted Average May 218 WAIMEA DIESEL ULSD BBL GALLONS COST EXCLUDE LT LAND TRANSP COST PER BARREL LT TOTAL Balance at 4/3/218 1, , ,13.6 3,732.6 Less: Est'd Inven Addition Purchases: Estimate (7,935) 7,935. (17,624.15) 17,624.2 (447.53) Transfers out: Estimate xxxxxxxxxxxxx xxxxxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxxx xxxxxxxxxxxxxxx xxxxxxxxxxxx Transfers in: Estimate (2.2) 3.2 (91) Consumed: Estimate 17.5 (16.8) 4,517 (4,486) 8,816.3 (8,649.9) (251.77) Balance Per G/L 4/3/218 1, ,632 13, , ULSD Purchases 1, #DIV/! Estimated Purchases 19 7,98 17, Transfer in xxxxxxxxxxxx (72) #DIV/! Consumed (148.7) (6,245) (12,244.6) (35.18) /31/218 Inven From Offsite/Transfers Est'd Inventory Addition 1, , , , Fuel Avg Price 1, , , , Reverse Fuel Balance Fuel Avg Price xxxxxxxxxxxx xxxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxxx (137,379.11) xxxxxxxxxxxx 136, xxxxxxxxxxxx 6/1/218 Avg Price 1, , , , Weighted Avg Cost/BBL by Location Weighted Avg Avg Cost

13 ATTACHMENT 3 SHEET 9 OF 1 HAWAII ELECTRIC LIGHT CO., INC. Estimated Weighted Average May 218 ULSD BBL KANOELEHUA DIESEL COST GALLONS EXCLUDE LT LAND TRANSP Balance at 4/3/218 1, , , ,925.4 Less: Est'd Inventory Addition Purchases: Estimate Transfers out: Estimate x x x x x x Transfers in: Estimate Consumed: Estimate (44.4) 2,285 (1,866) (3,847.65) (245.32) Balance Per G/L 4/3/218 ULSD Purchases Estimated Purchases Transfer in 1, , , , #DIV/! Consumed (52.4) (2,2) (967.4) (26.58) /31/218 Inventory From Offsite/Transfers Est'd Inventory Addition Fuel Avg Price Reverse Fuel Balance Fuel Avg Price 6/1/218 Avg Price 1, , , , , , , , x x (131,264.63) x x x 128, x 1, , , , Weighted Avg Cost/BBL by Location Weighted Avg Avg Cost

14 ATTACHMENT 3 SHEET 1 OF 1 HAWAII ELECTRIC LIGHT CO., INC. Estimated Weighted Average May 218 DISPERSED GENERATION BBL GALLONS COST COST/BBL Balance at 4/3/ ,77 7, Less: Est'd Inven Addition XXXXXXXXXXXXXXXXXX Purchases: Estimate (1.6) (447) (992.83) ,43.5 Consumed: Estimate (5.6) (234) (481.45) xxxxxxxxxx xxxxxxxxxxx xxxxxxxxxxx xxxxxxxxxx xxxxxxxxxxx xxxxxxxxxxx xxxxxxxxxx xxxxxxxxxxx xxxxxxxxxxx xxxxxxxxxx xxxxxxxxxxx xxxxxxxxxxx Balance Per G/L 4/3/ ,61 7, Purchases 9.64 Transfer out Transfer in xxxxxxxxxx xxxxxxxxxxx xxxxxxxxxxx xxxxxxxxxx xxxxxxxxxxx xxxxxxxxxxx Consumed (7.5) (316) (619.58) /31/ ,745 7, Est'd Inventory Addition Fuel 5/31/ ,745 7, Reverse Fuel Balance xxxxxxxxxxxx xxxxxxxxxxxx (7,412.21) xxxx Fuel Avg Price xxxxxxxxxxxx xxxxxxxxxxxx 7,57.92 xxxx 6/1/218 Avg Price ,745 7,

15 ATTACHMENT 4 HAWAII ELECTRIC LIGHT COMPANY, INC. CONTRACT PRICES EFFECTIVE May 1, 218 TYPE OF OIL BURNED Hill Industrial Puna Industrial INDUSTRIAL * /MBTU $/BBL /MBTU $/BBL Tax Ocean Transportation Storage Wharfage Fees Hilo Diesel Waimea Diesel DIESEL * /MBTU $/BBL /MBTU $/BBL Tax Ocean Transportation Storage Wharfage Fees Kona Diesel CT3 Diesel /MBTU $/BBL /MBTU $/BBL Tax Ocean Transportation Storage Wharfage Fees ULSD ULSD ** /MBTU $/BBL Tax Ocean Transportation Storage Wharfage Fees Tax includes HGET, Hawaii Use Tax, Liquid Fuel Tax, LUST Tax and Environmental Response Tax. 2 Fees include Custom Duty and Fed Oil Spill Recovery inventory, contract prices for the current month are being provided. Contract prices are considered accurate pending actual delivery of fuel. * Land Transportation Costs are shown in Attachment 3, Sheet 1. ** ULSD includes Waimea, Kanoelehua, and Keahole. Reference: Decision and Order No , Docket No

16 ATTACHMENT 5 SHEET 1 OF 1 Hawaii Electric Light Company, Inc. PURCHASED POWER PRICES FOR June 1, 218 June 1, 218 ( /kwh) Floor Rates ( /kwh) PGV (25 MW) PGV (22 MW) - on peak - off peak WAILUKU HYDRO - on peak off peak Other: (<1 KW) Sch Q Rate June 1, 218 ( /kwh) Floor Rates ( /kwh) HEP PGV Addtl 5 MW - on peak - off peak PGV Addtl 8 MW - on peak - off peak

17 ATTACHMENT 6 SHEET 1 OF 1 Hawaii Electric Light Company, Inc. Energy Cost Reconciliation Adjustment June 1, 218 Line No. Description Amount 1 Amount to be (returned) or collected ($1,153,9) 2 Monthly Amount ( 1 / 3 x Line 1) ($384,633) 3 Revenue Tax Divisor Total (Line 2 / Line 3) ($422,141) 5 Estimated MWh Sales (June 1, 218) 84,641 mwh 6 Adjustment (Line 4 / Line 5) (.499) /kwh

18 ATTACHMENT 7 HAWAII ELECTRIC LIGHT COMPANY, INC. 218 Cumulative Reconciliation Balance (1) (2) (3) (4) (5) (6) FOA Rec FOA Rec Month-end YTD FOA Adjust Less Try to Cumulative Month Reconciliation Qtr Variance Variance Collect Collect Balance November 785,4 [3] (82,548) 867,948 (261,8) (268,646) 534,241 December 16 (261,8) (283,626) 25,615 January 17. (261,8) (265,764) (15,149) February 1,366,4 [4] (46,589) 1,412,989 (455,467) (473,124) 924,716 March (455,467) (479,559) 445,157 April (455,467) (478,693) (33,536) May 445,1 (1) (45,713) 49,813 (148,367) (154,562) 32,715 June (148,367) (151,295) 151,42 July (148,367) (157,548) (6,128) August 5,8 [2] (32,349) 533,149 (166,933) (18,924) 346,97 September (166,933) (178,788) 167,39 October (166,933) (178,629) (11,32) November 714,2 [3] (35,27) 749,227 (238,67) (25,818) 487,89 December (238,67) (243,43) 243,686 January 18 (238,67) (242,224) 1,462 February 825,1 [4] (29,783) 854,883 (275,33) (279,869) 576,476 March (275,33) (283,895) 292,581 April (275,33) (291,829) 752 May 1,153,9 (1) (17,855) 1,171,755 (384,633) June (384,633) NOTES: Col(1): Quarterly FOA reconciliation amounts. (Refer to Attachment 6) A positive number is an over-collection. A negative number is an under-collection. Col(2): FOA reconciliation adjustment variance accumulated during the last three months, starting with the fourth prior month; the difference between the estimated recorded sales used to derive the $/kwh adjustment and the actual recorded sales. (Col(5)-Col(4)) Col(3): FOA reconciliation generated in the current quarter. The YTD FOA reconciliation difference minus the adjustment variance. Col(1)-Col(2) Col(4): Amount that the FOA reconciliation adjustment is trying to collect. (Col(1) * 1/3) Col(5): collected amount. (recorded sales * $/kwh adjustment/1.9751) Col(6): Cumulative balance of the FOA reconciliation (Previous balance + Col(3) + Col(5))

19 ATTACHMENT 8 Revised 6/1/18 Hawaii Electric Light Company, Inc. Residential Bill at 5 KWH/Month Consumption $25 $245 $24 $235 $23 $225 $22 Dollars per Month $215 $21 $25 $2 $195 $19 $185 $18 $175 $17 $165 $16 $155 $15 $145 $14 $135 $13 $125 Jan 215 Feb Mar Apr May June July August September October November December Jan 216 Feb Mar Apr May June July August September October November December Jan 217 Feb Mar Apr May June July August September October November December Jan 218 Feb Mar Apr May Jun

20 HAWAII ELECTRIC LIGHT COMPANY, INC. FUEL OIL ADJUSTMENT FACTOR DATA ATTACHMENT 9A Revised 6/1/18 EFFECTIVE DATE FUEL FACTOR CENTS / KWH RESIDENTIAL & RESIDENTIAL BILL ($) 5 6 KWH January 1, February 1, March 1, April 1, May 1, June 8, July 1, August 1, September 1, October 1, November 1, December 1, January 1, February 1, March 1, April 1, May 1, June 1, July 1, August 1, September 1, October 1, November 1, December 1, January 1, February 1, March 1, April 1, May 1, June 1, July 1, August 1, September 1, October 1, November 1, December 1, January 1, February 1, March 1, April 1, May 1, June 1,

21 ATTACHMENT 9B Revised 6/1/18 HAWAII ELECTRIC LIGHT COMPANY, INC. RESIDENTIAL SURCHARGE DATA EFFECTIVE DATE DESCRIPTION OF SURCHARGE RATE 4/9/12 FINAL RATE INCREASE (1.28%), DOCKET NO (21 TEST YEAR) 1/1/216-1/31/216 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 1/1/216-6/3/16 GREEN INFRASTRUCTURE FEE 1.3 DOLLARS/MONTH 2/1/216-2/29/16 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 3/1/216-3/31/16 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 4/1/216-4/3/16 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 4/1/216-4/3/16 SOLARSAVER ADJUSTMENT CENTS/KWH 5/1/216-5/31/16 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 5/1/216 SOLARSAVER ADJUSTMENT CENTS/KWH 6/1/216-6/3/16 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 6/1/216 RBA RATE ADJUSTMENT CENTS/KWH 7/1/216-7/31/16 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 7/1/216 GREEN INFRASTRUCTURE FEE 1.13 DOLLARS/MONTH 7/1/216 RESIDENTIAL PBF SURCHARGE ADJUSTMENT.5865 CENTS/KWH 8/1/216-8/31/16 PURCHASED POWER ADJUSTMENT CLAUSE 2.3 CENTS/KWH 9/1/216-9/3/16 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 1/1/216-1/31/16 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 11/1/216-11/3/16 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 12/1/216-12/31/16 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 1/1/217-1/31/217 PURCHASED POWER ADJUSTMENT CLAUSE 2.34 CENTS/KWH 1/1/217 GREEN INFRASTRUCTURE FEE 1.27 DOLLARS/MONTH 2/1/217-2/28/17 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 3/1/217-3/31/17 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 4/1/217-4/3/17 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 4/1/217-4/3/17 SOLARSAVER ADJUSTMENT CENTS/KWH 5/1/217-5/31/17 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 5/1/217 SOLARSAVER ADJUSTMENT CENTS/KWH 6/1/217-6/3/17 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 6/1/217 RBA RATE ADJUSTMENT CENTS/KWH 7/1/217-7/31/217 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 7/1/217-12/31/17 GREEN INFRASTRUCTURE FEE 1.18 DOLLARS/MONTH 7/1/217 RESIDENTIAL PBF SURCHARGE ADJUSTMENT.4244 CENTS/KWH 8/1/217-8/31/17 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 9/1/217-9/3/17 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 8/31/217-4/318 INTERIM RATE INCREASE PERCENT ON BASE 8/31/217 RBA RATE ADJUSTMENT.6313 CENTS/KWH 1/1/217-1/31/17 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 11/1/217-11/3/17 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 12/1/217-12/31/17 PURCHASED POWER ADJUSTMENT CLAUSE 2.49 CENTS/KWH 1/1/218-1/31/18 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 1/1/18-6/3/18 GREEN INFRASTRUCTURE FEE 1.34 DOLLARS/MONTH 2/1/18-2/28/18 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 3/1/18-3/31/18 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 4/1/18-4/3/18 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 4/1/18-4/3/18 SOLARSAVER ADJUSTMENT CENTS/KWH 5/1/18-5/31/18 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 5/1/18-5/31/18 SOLARSAVER ADJUSTMENT CENTS/KWH 5/1/218 INTERIM RATE INCREASE PERCENT ON BASE 6/1/18-6/3/18 PURCHASED POWER ADJUSTMENT CLAUSE CENTS/KWH 6/1/218 RBA RATE ADJUSTMENT 1.6 CENTS/KWH **Base charges include customer charge, demand charge, energy charge, power factor adjustment, voltage discount, and minimum charge.

22 ATTACHMENT 1 Revised 6/1/18 Hawaii Electric Light Company, Inc. Calculations of the Average Residential Customer Bill Base Rates Base Fuel Energy Charge Non-fuel Fuel Energy Charge First 3 kwh per month Next 7 kwh per month Customer Charge Total Base Charges Interim Rate Increase 216 TY RBA Rate Adjustment Purchased Power Adj. Clause PBF Surcharge DSM Adjustment SolarSaver Adjustment Energy Cost Adjustment Green Infrastructure Fee Avg Residential Bill at 5 kwh Rate 5/1/18 6/1/18 effective date: 4/9/212 4/9/212 /kwh /kwh /kwh /kwh $ % on base 2.5% 2.5% /kwh /kwh /kwh /kwh /kwh /kwh (.452) 2.31 $ Charge ($) at 5 Kwh 5/1/18 6/1/18 Difference $81.24 $81.24 $ $62.72 $62.72 $ $33.61 $33.61 $ $29.11 $29.11 $ $1.5 $1.5 $ $ $ $ $3.86 $3.86 $ $3.16 $5. $1.84 $11.7 $8.36 -$3.34 $2.12 $2.12 $ $ $ $ $ $ $ -$2.26 $11.51 $13.77 $1.34 $1.34 $ $ $ Increase (Decrease -) % Change $ % Base Rates Base Fuel/Energy Charge Non-fuel Fuel Energy Charge First 3 kwh per month Next 7 kwh per month Customer Charge Total Base Charges Interim Rate Increase 216 TY RBA Rate Adjustment Purchased Power Adj. Clause PBF Surcharge DSM Adjustment SolarSaver Adjustment Energy Cost Adjustment Green Infrastructure Fee Avg Residential Bill at 6 kwh Rate 5/1/18 6/1/18 effective date: 4/9/212 4/9/212 /kwh /kwh /kwh /kwh $ % on base 2.5% 2.5% /kwh /kwh /kwh /kwh /kwh /kwh (.452) 2.31 $ Charge ($) at 6 Kwh 5/1/18 6/1/18 Difference $97.49 $97.49 $ $77.27 $77.27 $ $33.61 $33.61 $ $43.66 $43.66 $ $1.5 $1.5 $ $ $ $ $4.63 $4.63 $ $3.79 $6. $2.21 $14.4 $14 -$4. $2.55 $2.55 $ $ $ $ $ $ $ -$2.71 $13.81 $16.52 $1.34 $1.34 $ $28.9 $ Increase (Decrease -) % Change $ %