15kW Power Booster Package
Bring your energy use and roof potential into the same conversation. MJM Solar’s 15kW Power Booster Package is an option for Perth businesses and higher-demand homes that need a larger solar assessment.
A 15kW solar system in Perth should be designed around the property’s working day, electrical supply and usable roof area. For an office, workshop or home business, the starting question is how much electricity is used while solar is being generated.

Package Overview
Package detail and proposed configuration for a typical 15kW design. Every figure is confirmed in your site-specific quote.
15 kW package; exact array rating and panel count shown in your quote
15 kW inverter configuration, subject to site design and connection assessment
Solis, Sigenergy, GoodWe, FoxESS, subject to model suitability and availability
Roof mounting, electrical work and commissioning as itemised in your site-specific quote
Optional; separately specified and priced
Request a quote for your property and selected equipment
Right Fit
A business with regular daytime equipment use may have a useful match between solar production and demand. An office operating five days a week needs a different model from a business that runs refrigeration every day or machinery in short bursts.
Share operating hours, recent bills and interval electricity data if available. For a home, explain the major loads and when they run. A large floor area alone is not a reason to choose this system size.
These details help match the system to your demand.
Ask for a site-specific installed quote identifying the panel model and count, inverter, mounting and electrical scope. Roof access equipment, a switchboard upgrade or work needed for the connection should be visible in the price rather than left as an assumption.
For business comparisons, confirm whether figures include or exclude GST. Any incentive deduction must have an eligibility basis, and any battery or backup equipment should be priced separately. Compare the whole project cost before choosing between equipment options.
≈66 kWh / day
Illustrative Perth annual average
An illustrative Perth annual average is about 66 kWh/day, using the Australian Government benchmark. Actual output varies; request a site-specific monthly forecast.

Existing Solar
The Power Booster name identifies the package; it does not mean 15 kW can automatically be added to an existing installation. Existing panels and inverters need to be assessed alongside the proposed work and the site’s total generation capacity.
If older equipment is being replaced, agree the removal scope and how the new design will use the roof. If equipment is staying, the quote should identify which parts remain, their condition and how they fit into the final system.
Installation Planning
01
Check the usable roof sections, roof condition and safe access for the proposed work.
02
Assess supply phase, switchboard capacity, other generation and the connection requirements.
03
Agree site access, any planned interruption and the handover arrangements before installation.
See our residential solar service for the wider process. If the project is residential, tell us at the start so the assessment and quote reflect how your home operates.
Compare Sizes
This package
Power Booster Package
Match the extra energy you can use, roof fit and total project cost.
Stronger daytime demand
A home or business with stronger daytime demand can compare the 20kW package.
The decision should follow the extra energy you can use, roof fit and total project cost.
FAQ
Still have a question about your 15kW design? Call 0475 404 818 or send MJM Solar an enquiry.
As a calculation example, 30 panels at 500 W total 15 kW. The actual module selection and roof plan determine the installed count and dimensions. Check those details on the proposal.
Solar can reduce imported energy when production overlaps with demand. Fixed charges can remain, and any demand-related charges need separate analysis against your tariff and measured peaks. Request an estimate that separates these items.
A battery can be assessed as a separate part of the project. Review the compatible equipment, storage capacity, output power and intended use. Backup for business equipment requires a defined design rather than an assumption that all circuits will run. See our battery storage options.
Free Site-Specific Quote
Tell us whether the property is a home or business, whether solar is already installed and what you want to improve. Contact MJM Solar on 0475 404 818.