Direct Mail That Drove Real Enrollments

type: Case Study
published: Dec 14, 2025
service_type: Direct Mail Retargeting
description: How targeted direct mail retargeting delivered a 5.7% engagement rate and 33% call-to-sale conversion for an energy client's solar buyback program.
canonical: https://mattkundodigitalmarketing.com/case-studies/energy-client-direct-mail/

The Campaign in Detail

When the energy client approached us, they had a strong digital presence with Google Ads and SEO driving consistent traffic to their Solar Buyback landing pages. But they were leaving money on the table, website visitors who showed interest but didn't convert were simply disappearing into the digital void.

Direct mail retargeting offered a solution: reach those same visitors in their physical mailbox within 2-3 days of their site visit, while the brand and offer were still fresh in their minds.

Creative Testing: Finding What Works

We didn't assume we knew what would resonate. Instead, we ran a structured A/B test with two distinct creative concepts:

Concept A: A bold, attention-grabbing design with distinctive imagery
Concept B: A family-focused approach with lifestyle imagery

The results weren't even close. Concept A delivered approximately 1.0% response rate compared to just 0.2% for Concept B, a 5x difference that would have been impossible to predict without testing.

Targeting Strategy

Not all website visitors are created equal. We layered multiple targeting criteria to focus spend on the highest-potential prospects:

Geographic focus: Texas ZIP codes with documented solar density
Behavioral signals: Website visitors who engaged with Solar Buyback content
Historical propensity: Areas with proven response rates from previous campaigns

Measurement Stack

Attribution is everything in direct mail. We implemented a comprehensive tracking system:

Direct mail platform: Send/response tracking with daily reporting
Call tracking: Source-level attribution for phone conversions
GA4 integration: QR code scans and landing page behavior

This allowed us to see not just who responded, but how they responded and whether they converted, critical data for optimizing future campaigns.

The Bottom Line

With a typical monthly budget of $1,200-$1,500, the campaign delivered measurable enrollments and proved direct mail retargeting as a viable, net-positive channel. The key insight: it works best as a supplement to strong digital campaigns, not a replacement for them.

For businesses with website traffic and sufficient margins, direct mail retargeting offers something digital channels can't: a physical touchpoint that cuts through the noise and reaches prospects where digital ads can't follow.

{
  "url": "https://mattkundodigitalmarketing.com/case-studies/energy-client-direct-mail/",
  "ai_url": "https://mattkundodigitalmarketing.com/ai/case-studies/energy-client-direct-mail/",
  "content_type": "case_study",
  "service_type": "Direct Mail Retargeting",
  "canonical": "https://mattkundodigitalmarketing.com/case-studies/energy-client-direct-mail/"
}