May 21, 2026

How to Mine Your Old Job Database for Highly Profitable Battery Retrofits

Cold Facebook leads for battery storage cost $80–$200 each. They don’t know you. They’ll get three other quotes. And they’ll choose on price.

Your best battery sales leads cost nothing. They’re already in your job management system. They’ve bought from you before, they trusted you enough to let you on their roof, and they’re now getting a 5-cent feed-in tariff on a system you installed in 2019 that was designed for a market that no longer exists.

Here’s how to find them and what to say.

Why 2018–2022 Solar Customers Are Your Ideal Retrofit Targets

The economics of residential solar changed significantly around 2022–2023. Here’s why customers who bought in the previous window are now prime battery candidates:

The Feed-in Tariff Collapse

In 2018–2020, many Australian states offered feed-in tariffs of 8–20 cents/kWh. Solar systems installed in that window were designed around the assumption that exported power was worth something meaningful.

In 2026, most feed-in tariffs are 3–7 cents/kWh. In some networks, new customers are receiving zero guaranteed export rate — just access to spot market pricing which is often negative at midday.

A customer with a 6.6kW system installed in 2020 was getting 10–12 cents/kWh for their exports. They’re now getting 5 cents for the same exports. Their solar system’s economic performance has deteriorated significantly — through no fault of the installation.

The 1.5kW Export Clamp Risk

As of May 2026, any modification to a solar system using non-CSIP-compliant inverter equipment results in a permanent 1.5kW export cap. Customers with legacy systems who haven’t yet modified them are on borrowed time — the moment they want to upgrade, they face the clamp unless they go fully compliant.

For a 2020-vintage 5kW solar system with a basic grid-tied inverter, the combination of:

5-cent feed-in tariff (down from 10-12 cents)
Potential 1.5kW export clamp on any future modification
Midday curtailment from network export management

…means the system’s economics are materially worse than when it was sold. Battery storage converts the problem into a solution — store the excess generation instead of exporting it at 5 cents, and use it in the evening instead of buying it back at 30+ cents.

The System Age Sweet Spot

The ideal retrofit candidate:

Installed 2018–2022 — old enough that feed-in economics have shifted, recent enough that the hardware is still in good condition
System size 5kW+ — enough generation to have meaningful excess to store
Inverter without CSIP capability — creates the compliance urgency lever
Single-phase supply — simpler battery integration than three-phase
Detached house — structural roof access, no strata approval requirements

Not every customer in this window fits the profile, but for a business that installed 100+ systems in that period, 30–50 retrofit-ready leads in your database is a reasonable expectation.

Step 1: Identify Your Retrofit Leads in ServiceM8

ServiceM8 stores complete job history against each client record. The fastest way to build your retrofit list:

Filter by: Job type tag containing “Solar” or “PV” or “Install” (depending on how you tagged jobs in your system) + Date range 2018–2022

If your historical jobs aren’t tagged consistently, use the client search and filter by job description keywords. It’s less clean, but workable.

Export the filtered list to CSV (ServiceM8 → Reports → Client List with filters applied).

The output gives you: client name, address, phone, email, job date, and any job description detail you entered at the time.

Then manually review for:

System size (should be in the job notes or invoice description)
Inverter model (check the job photos if attached — most installers photograph the inverter label)
Whether you’ve done any subsequent work on this system (upgrade/modification already done = off the list)

Step 2: Build the Outreach Sequence

Cold call or email? For existing customers, both work — but the framing matters.

The wrong framing: “We have a great deal on battery storage.” The right framing: “We installed your solar system in [year] and there are some regulatory changes affecting systems like yours that I want to make sure you know about.”

The regulatory framing is honest (the CSIP changes are real) and creates genuine urgency without sounding like a sales pitch. You’re informing a past customer about something that directly affects their investment.

Email Template (Adapt to Your Voice)

Subject: Important update about your solar system at [address]

Hi [Name],

We installed your solar system at [address] back in [year] and wanted to reach out about some changes that may affect its performance.

Since your install, feed-in tariffs in your area have dropped from [approx. old rate] to [current rate]. If you’re exporting significant solar during the day, you’re likely getting less return than when the system was designed.

There have also been new network regulations effective May 2026 that affect older inverter models — including systems like yours — which I’d like to walk you through in a quick 10-minute call.

The good news: the solution is straightforward, and when it’s right for your situation, the upgrade often pays for itself faster than the original solar install.

Are you free for a quick call this week?

[Your name and number]

Phone Call Framework

When they answer:

Establish credibility: “We installed your solar at [address] in [year]”
Lead with information, not a pitch: “There are some regulatory changes affecting systems like yours that I wanted to flag”
Quantify the current situation: “Based on your system size, you’re likely exporting [X] kWh/day for about 5 cents — that’s [dollar figure] of potential that’s currently not being captured”
Ask the diagnostic question: “Have you looked at your bills lately — are you seeing what you expected from the system?”
If engaged, book the site assessment: “I’d like to come out and assess exactly what makes sense for your setup”

Step 3: The Site Assessment Pitch

At the site assessment, the three-play structure from the 2026 Solar Playbook gives you a clear framework:

Compliance upgrade: CSIP-compliant hybrid inverter — protects the system from the 1.5kW export clamp on any future modification
Battery storage: LFP battery — converts excess generation from 5-cent export to 30-cent displacement
VPP enrolment (if appropriate): The battery earns event payments during grid stress, adding a revenue dimension to the system

Present these as a system, not separate line items. The customer who understands the three-play is buying an energy asset, not components.

The Numbers on This Pipeline

For a business with 100 solar installations in the 2018–2022 window:

Assume 40% fit the ideal retrofit profile = 40 potential leads
Assume 25% contact rate from the email + phone outreach = 10 conversations
Assume 40% conversion from site assessment to sale = 4 jobs
Average battery retrofit job: $8,000–$15,000

That’s $32,000–$60,000 in revenue from a list you already own, reached through outreach that costs nothing but your time.

Compared to $80–$200 per lead from paid ads, the ROI on database mining isn’t close.

And this isn’t a one-off campaign. As your install base grows, the retrofit pipeline grows with it. Every system you install today is a battery retrofit opportunity in 3–5 years.

What You Need in ServiceM8 to Make This Repeatable

For this to be a systematic lead generation process rather than a one-time exercise:

Tag every new solar job with the system size, inverter model, and system type (solar-only vs hybrid) at the time of install
Set a follow-up task 36 months from install date to trigger a “retrofit check” outreach for solar-only systems
Build an email template in your CRM or email tool that pulls the install details dynamically

ServiceM8’s job records and client history support all of this. The effort to set it up correctly once is recovered on the first retrofit campaign you run.

For the complete job management setup for solar businesses, including job templates and client communication automation: ServiceM8 for Solar Businesses.

Summary

Your retrofit pipeline is sitting in your job history, not in Facebook Ads Manager.

Filter your database for solar-only installs from 2018–2022, 5kW+
Identify the best candidates — legacy inverter, single-phase, detached house
Lead with the regulatory/economic update framing — honest, urgent, not pushy
Use the three-play framework at site assessment — compliance upgrade, battery, VPP
Set up recurring triggers so the process runs automatically as systems age

The customers who bought solar from you once already trust you. Use that trust before a competitor does.

Start your free ServiceM8 trial →