Free energy assessment
Your free energy assessment: a system designed on your own numbers.
We review your bill, your usage and your site, then give you a report with system size, equipment list and payback time.
Start an assessmentIs your system sized on a guess?
Does this sound familiar?
We believe a solar system should be designed on your own numbers, not a template.
Design around evidence, not assumptions.
Our energy audit and design is the free energy assessment. It is the same thing, and it costs you nothing. We review your bill and your usage, including demand charges. For big sites, we can log your usage on site for 1 to 2 weeks before we size anything.
Your system is designed in house, with FoxESS and Sigenergy inverters and batteries. EFJS Printing paid back its investment in 2.5 years.
And we can do the same for you.

What you get from your free energy assessment
Know your numbers first
We review your bill, usage and demand charges, which means the design is sized to what you really use.
See before you commit
You get a PDF report and a walk-through with your system size, equipment list and payback time, which means you decide with real numbers.
Fewer surprises on site
We look at your roof and electrical setup, which means the design fits your property.
Paperwork handled for you
CoC and SSEG application handled for you. SSEG fees and meter costs are included in our quotes, which means no surprise compliance bill later.
Backed by a 10-year swap-out warranty
Every system we fit carries a 10-year swap-out warranty on the inverter and battery, which means a faulty part gets swapped out, not left for you to chase.
Quick from first call to switch-on
First call to switch-on is about 1 to 3 weeks, depending on approvals, paperwork and the size of your system, which means you can plan your switch-on.
What we look at
Start with what
is already there.
We start with what is already there: your bill, your roof, your electrical setup and how your property uses power.
Electricity profile
Your bill and your past usage show what size of system you need.
Property layout
Your roof and the space you have shape the design.
DB-board context
Your electrical setup tells us how the system connects.
Equipment needs
How your building or home uses power decides what the system must carry.
What you want to achieve
Tell us what you want the system to do, and we design with that in mind.
Your free energy assessment in 3 steps
1
Book your free energy assessment
It is free, and it starts with your electricity bill and how your property uses power.
2
We review, log and design
We review your bill, including demand charges, and look at your site. For big sites, we log your usage on site for 1 to 2 weeks. Then we design your system.
3
Get your report and walk-through
You get a PDF report and a walk-through, about 1 to 2 weeks after we start, depending on your site. It shows your system size, equipment list and payback time.
How are we different?
With us
- Free energy assessment, with a PDF report and walk-through
- Your system sized on your own bill and site
- CoC and SSEG handled, fees and meter costs in your quote
- 10-year swap-out warranty on the inverter and battery
With them
- A generic estimate, not your numbers
- Sizing based on guesses
- Paperwork and fees that turn up after you sign
- Limited or no support
Try it first
Begin with
your bill.
Want a rough idea first? Use ZenSolar’s calculators with your bill.
Still have questions?
We review your bill and your usage, including demand charges if you run a business. We look at your site, including your roof and electrical setup. For big sites, we can log your usage on site for 1 to 2 weeks. Then we design your system.
No. They are the same thing, and it is free.
A PDF report plus a walk-through. The report gives your system size, equipment list and payback time.
The report takes about 1 to 2 weeks, depending on your site. Big sites can get 1 to 2 weeks of on-site logging.
About 1 to 3 weeks, depending on approvals, your paperwork and the size of your system.
Yes, but we assess it first. We only take on the work once you agree to a proper repair.
Yes. SSEG fees and meter costs are included in our quotes, and we handle your CoC and SSEG application for you.
We fit FoxESS and Sigenergy. Every system carries a 10-year swap-out warranty on the inverter and battery.
Still have a question? Get in touch and we will answer it directly, or see everything ZenSolar offers on Services.
Next step
Start with
your property.
Tell us how you use electricity and what you want the system to achieve. You get a report in about 1 to 2 weeks.