South DakotaRebate Program

Otter Tail Power Company - Residential and Commercial Energy Efficiency Rebate Program

You getAir-Conditioner Rebates ENERGY STAR® air-conditioning unit — up to $150 Heat Pump Rebates Cold-climate heat pump (ductless) — $600/ton + $200/ton Quality install + $40/ton energy control (total up to $840/ton) Cold-climate heat pump (ducted) — $800/ton + $200/ton Quality install + $40/ton energy control (total up to $1,040/ton) Standard heat pump (ducted or ductless) — $300/ton + $200/ton Quality install (total up to $500/ton) Air-to-water heat pump — $800/ton + $200/ton Quality install (total up to $1,000/ton) Geothermal heat pump (residential) — $1,200/ton + $200/ton desuperheater + $200/ton Quality install + $40/ton energy control (total up to $1,640/ton) Geothermal heat pump (commercial) — $900/ton + $200/ton desuperheater + $200/ton Quality install + $40/ton energy control (total up to $1,340/ton) Electric Heating Rebates Plenum heater / electric boiler / ducted electric furnace / qualifying heat pump on Dual Fuel or RDC — $40/kW Electric cable or panel storage heating on Dual Fuel — $40/kW Baseboard / cove heat / garage unit heater / radiant electric on Dual Fuel or RDC — $20/kW Qualified heat-storage systems on Deferred Load, RDC, or Fixed Time of Delivery — $75/kW Electric Panel Upgrade Electric panel upgrade — Up to $150 Electric Water Heating 80-gallon or larger (new to off-peak) — $400 80-gallon or larger (replacement) — $200 50-gallon (new to off-peak) — $200 50-gallon (replacement) — $100 Heavy-duty commercial water heating — $50/kW (min 12 kW & 120 gal; max $5,000) Water Heater Rebates Qualifying water heater with enrollment in off-peak service — up to $400 Smart Thermostat Rebates Smart thermostat — up to $150 Residential Outdoor Electric Equipment Riding lawnmower — $750 Push lawnmower — $250 Snow blower — $150 Weed trimmer or leaf blower — $25 EV Charging Stations & Rate Level 2 charger on off-peak rate — $500 rebate Electric Vehicle Rebates EV rebates available for new and used battery and hybrid models — $750 - $3,000 Insulation Rebates Home insulation upgrades — up to $2,800 ENERGY STAR® Appliance Rebates Heat pump water heater — $200/unit Appliance recycling (fridge/freezer) — $50 rebate Window air conditioner — $25 rebate Dehumidifier — $10 rebate Heat pump clothes dryer — $50/unit Induction cooktop or range — $50/unit Refrigerator — $50/unit Freezer (chest or upright) — $50/unit Dishwasher — $50/unit Clothes washer — $50/unit Electric clothes dryer — $25/unit Air purifier — $25/unit Dehumidifier (tier) — $25/unit ENERGY STAR® Window Rebates Qualified window — $25/window LED Lighting In-store instant rebates on LED bulbs — (amount varies) Thermal-Storage Systems Thermal-storage system — up to $75/kW

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Quick facts

Incentive type: Rebate Program
Amount: Air-Conditioner Rebates ENERGY STAR® air-conditioning unit — up to $150 Heat Pump Rebates Cold-climate heat pump (ductless) — $600/ton + $200/ton Quality install + $40/ton energy control (total up to $840/ton) Cold-climate heat pump (ducted) — $800/ton + $200/ton Quality install + $40/ton energy control (total up to $1,040/ton) Standard heat pump (ducted or ductless) — $300/ton + $200/ton Quality install (total up to $500/ton) Air-to-water heat pump — $800/ton + $200/ton Quality install (total up to $1,000/ton) Geothermal heat pump (residential) — $1,200/ton + $200/ton desuperheater + $200/ton Quality install + $40/ton energy control (total up to $1,640/ton) Geothermal heat pump (commercial) — $900/ton + $200/ton desuperheater + $200/ton Quality install + $40/ton energy control (total up to $1,340/ton) Electric Heating Rebates Plenum heater / electric boiler / ducted electric furnace / qualifying heat pump on Dual Fuel or RDC — $40/kW Electric cable or panel storage heating on Dual Fuel — $40/kW Baseboard / cove heat / garage unit heater / radiant electric on Dual Fuel or RDC — $20/kW Qualified heat-storage systems on Deferred Load, RDC, or Fixed Time of Delivery — $75/kW Electric Panel Upgrade Electric panel upgrade — Up to $150 Electric Water Heating 80-gallon or larger (new to off-peak) — $400 80-gallon or larger (replacement) — $200 50-gallon (new to off-peak) — $200 50-gallon (replacement) — $100 Heavy-duty commercial water heating — $50/kW (min 12 kW & 120 gal; max $5,000) Water Heater Rebates Qualifying water heater with enrollment in off-peak service — up to $400 Smart Thermostat Rebates Smart thermostat — up to $150 Residential Outdoor Electric Equipment Riding lawnmower — $750 Push lawnmower — $250 Snow blower — $150 Weed trimmer or leaf blower — $25 EV Charging Stations & Rate Level 2 charger on off-peak rate — $500 rebate Electric Vehicle Rebates EV rebates available for new and used battery and hybrid models — $750 - $3,000 Insulation Rebates Home insulation upgrades — up to $2,800 ENERGY STAR® Appliance Rebates Heat pump water heater — $200/unit Appliance recycling (fridge/freezer) — $50 rebate Window air conditioner — $25 rebate Dehumidifier — $10 rebate Heat pump clothes dryer — $50/unit Induction cooktop or range — $50/unit Refrigerator — $50/unit Freezer (chest or upright) — $50/unit Dishwasher — $50/unit Clothes washer — $50/unit Electric clothes dryer — $25/unit Air purifier — $25/unit Dehumidifier (tier) — $25/unit ENERGY STAR® Window Rebates Qualified window — $25/window LED Lighting In-store instant rebates on LED bulbs — (amount varies) Thermal-Storage Systems Thermal-storage system — up to $75/kW
Administrator: Otter Tail Power Company
Applies to: Utility, Commercial, Residential
Technologies: Air conditioners, Ductless Mini-Split Heat Pump, Ducted Mini-Split Heat Pump, Heat pumps, Geothermal Heat Pumps, Furnaces, Boilers, Electrical Panel, Water Heaters, Level-2 Electric Vehicle Service Equipment, Insulation, Heat Pump Water Heater, Refrigerators/Freezers, Dehumidifiers, Heat Pump Clothes Dryer, Electric Cooking Appliance, Dishwasher, Clothes Washers, Electric Clothes Dryer

Dates

Source last updated: September 9, 2025

About this incentive

Otter Tail Power Company offers incentives to all residential customers in South Dakota to install energy efficient equipment in residences. Rebates are available for geothermal and air source heat pumps and electric water heaters, as well as a variety of other efficient products.

Data updated September 9, 2025. Always confirm details on the official program website before applying. Programs change frequently.