The water heater category has long been the sleeping giant of utility energy efficiency portfolios. High rebate values, significant energy savings, and strong customer demand make it a natural fit—yet many programs struggle to move beyond a few dozen units per month.
Not anymore.
In December 2025, Southern California's largest natural gas utility achieved what few utility programs have accomplished: over 100 water heater units deployed in a single day, averaging 67 water heaters per day throughout the month. The momentum has continued into 2026, with daily deployments approaching 500 units in early February.
In a market with approximately 500,000 annual water heater sales—including roughly 425,000 gas units—the program's December run rate of 67 units per day represented approximately 5% market penetration. With daily deployments approaching 500 units in early February, the program demonstrated the potential to scale significantly higher, though sustained performance will depend on program budget allocation and marketing investment levels. Powered by the Enervee Marketplace platform, this penetration rate provides a replicable benchmark for utilities of any size.
This level of scale seemed impossible just months earlier. The utility had been running an Enervee Marketplace for years, but the program transformed in 2025 through a combination of three strategic additions: large-scale monthly email campaigns launched early in the year, Enervee's launch of enterprise direct delivery in August, and an expanded paid media partnership. Together, these created consistent customer demand while removing fulfillment bottlenecks—enabling the transformation from a few hundred units annually to triple-digit daily deployments in under five months.
This isn't just impressive growth. It's a roadmap for how utilities can transform water heater programs into high-performing, customer-friendly initiatives that deliver both scale and equity.
The challenge: Traditional water heater programs leave savings potential unrealized
Most utility water heater programs face similar obstacles:
- Complex rebate application processes that frustrate customers
- Limited contractor networks that can't scale with demand
- Inventory and fulfillment challenges that create long wait times
- Difficulty reaching disadvantaged and hard-to-reach communities
- High administrative overhead relative to program throughput
The result? Significant savings potential goes unrealized while customers continue installing standard-efficiency equipment.
The solution: Adding direct delivery to the Enervee Marketplace platform
This Southern California utility has run a white-labeled Enervee Marketplace for years, offering customers instant rebates and streamlined access to high-efficiency equipment. But the program reached a new level of performance in 2025 when Enervee integrated a leading national distributor's enterprise-scale direct delivery capabilities into the platform. Enervee established the distributor partnership and completed the technical integration, eliminating the traditional inventory and logistics barriers that had limited water heater program scale.
Four keys to success
1. Instant rebates, zero paperwork
The Enervee Marketplace applies rebates up to $1,500 instantly at checkout—made possible by direct API integration with the utility's rebate system. Customers see their final price immediately—no forms, no waiting, no follow-up. The friction that typically kills 30-40% of rebate participation simply doesn't exist.
2. Customer choice: Direct delivery or install+ options
The Enervee platform offers two fulfillment paths tailored to different customer needs:
- Direct delivery (90%+ of customers choose this): A leading national distributor delivers high-efficiency tankless water heaters directly to the customer or their licensed contractor of choice. Fast, flexible, and ideal for customers with existing contractor relationships. The distributor's national scale, speed, and reliability—backed by extensive product selection and distribution infrastructure—enabled the program to scale to triple-digit daily deployments without inventory constraints or fulfillment delays.
- Install+ with Fixed-Price Installation: Customers can purchase the water heater plus professional installation at a fixed, transparent price through licensed Specialty Installers, including haul-away service. One transaction, one price for a defined scope—complete peace of mind.
3. Strategic marketing: Paid media + monthly email campaigns
Enervee deployed a multi-channel marketing strategy throughout 2025 in partnership with the utility's agency of record. Large-scale monthly email campaigns to the utility's customer base created consistent baseline demand, while paid media—including programmatic display, Meta, Reddit, and Google Performance Max campaigns—amplified reach and drove incremental volume. The result was sustained demand generation that filled the top of the funnel month after month.
4. Removing financial barriers with Eco Financing
Beyond instant rebates, Enervee is launching Eco Financing nationally this quarter—an integrated financing solution that allows customers to spread upgrade costs over time with competitive rates. For high-ticket items like water heaters, financing transforms "I can't afford it today" into "I can start saving energy today." We'll share more details on the Eco Financing platform in an upcoming blog post, but early results show it significantly expands the addressable market for efficiency programs.
Real impact: Equity at scale
High-volume programs often struggle to reach priority populations. The assumption is that convenience and scale will naturally skew toward affluent, well-connected customers. This utility's results prove otherwise.
The program is reaching the customers who need efficiency upgrades most:
- 1 in 6 customers from disadvantaged communities—populations that face higher energy burdens and have historically been underserved by traditional rebate programs
- 1 in 5 customers classified as hard-to-reach—rural areas, non-English speakers, and communities with lower program awareness
- 17% of participants are renters or non-single-family homeowners—a demographic that typically sees single-digit participation in water heater programs due to split incentives and landlord coordination challenges
"When you combine instant rebates through API integration, enterprise fulfillment partnerships, and a streamlined digital experience, you don't just make programs more efficient—you fundamentally expand who can participate," said Toby Welch, VP of Utility Partnerships at Enervee. "The equity outcomes we're seeing aren't the result of special targeting. They're the natural result of removing the barriers that have historically excluded disadvantaged and hard-to-reach communities from traditional rebate programs."
The Enervee Marketplace platform's combination of instant rebates, flexible fulfillment options, and digital accessibility creates natural equity outcomes. When you eliminate paperwork, remove wait times, and provide transparent pricing, you serve everyone—especially the customers who are most likely to abandon complex traditional processes.
The program delivered almost 7x year-over-year growth in total savings goals while simultaneously expanding reach into underserved communities. This demonstrates that operational excellence and equity goals aren't in tension—they're complementary.
What this means for your territory
These results demonstrate that the Enervee Marketplace platform delivers a repeatable model for utilities looking to scale water heater programs:
For gas utilities: Tankless gas water heater programs can achieve triple-digit daily deployments when powered by the Enervee platform with enterprise fulfillment partnerships, particularly in markets with established gas heating customers and strong contractor networks.
For electric utilities: The same Enervee Marketplace infrastructure applies to heat pump water heaters, which offer even greater energy savings and support electrification goals. The instant rebate mechanism, dual fulfillment options (direct delivery and install+), and digital marketing playbook transfer directly to electric programs.
For all utilities: The Enervee platform architecture—white-labeled marketplace, instant rebates, enterprise fulfillment partnerships, and integrated installation services—solves the structural challenges that have historically limited water heater program performance and equity reach.
The 5% market capture benchmark: This utility's December performance—67 units per day sustained throughout the month—represents approximately 5% penetration of their estimated 500,000 annual water heater market. For a utility with a market of 100,000 annual water heater sales, achieving the same 5% capture rate would mean 5,000 units annually, or 13-14 units per day—a transformational improvement over typical program performance. The February peak of nearly 500 units/day demonstrates that significantly higher capture rates are achievable with appropriate budget allocation and marketing investment, leaving substantial room for continued growth.
Ready to scale your water heater program?
The infrastructure that delivered 5% market capture, 100+ units per day, and strong equity outcomes isn't theoretical—it's operational today.
Talk to Enervee about replicating these results in your territory. We'll show you exactly how the platform architecture works: the distributor partnerships that enable direct delivery at scale, the API integrations that make instant rebates possible, and the marketing playbook that generated sustained demand month after month.
Whether you're targeting gas water heaters or heat pump water heaters, the model is the same. The only question is: what does 5% of your market look like?