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Off-Grid Solar Systems

25kW 3-Phase Commercial System

25kW three-phase system delivering strong AC output with 48kWh storage for workshops and machinery-heavy homes.,
$58-$64
after rebate
White SIG battery unit positioned next to a dark solar panel against black background
White SIG battery unit positioned next to a dark solar panel against black background

25kW 3-Phase Off-Grid Workshop Kit

This robust 25kW three-phase off-grid solar system delivers continuous AC power for homes and workshops with three-phase machinery. Features a 48 kWh battery bank for reliable performance, expandable design with optional diesel generator integration, and DC car charger support for electric vehicle owners. Shed roof installation available fully installed after rebate.

BEST FOR

Home Owner with Hobby Workshop, Small Manufacturing Business, Large Family with Electric Vehicle, Property owners with three-phase machinery

Summary

25kW three-phase off-grid system for homes or workshops with three-phase machinery: continuous 25kW AC, 48kWh battery, expandable to 50kW solar. Integrates with diesel generator and EV DC charger. Roof install 8-64k after rebates.

25kW 3-Phase Commercial

$58-$64
-
After Rebate
SOLAR Arrary
25kW
Battery
48kWh
Inverter
25kW
Daily load
~ 46.875 kWh
White SIG battery unit positioned next to a dark solar panel against black background

25kW Three-Phase Off-Grid Solar System – 25kW

This robust 25kW three-phase off-grid solar system is designed to meet the needs of homes or workshops equipped with three-phase machinery. The system delivers a continuous 25 kW of AC power, ensuring reliable performance for your equipment. With a substantial 48 kWh battery bank, it guarantees a steady power supply.

The system is also highly versatile and expandable. You can integrate a diesel generator for additional power support if needed. Additionally, it supports the inclusion of a DC car charger, enhancing its functionality for electric vehicle owners.

Shed roof installation $58-$64 fully installed after rebate. Ground Mount Install can be quoted additionally if required.

System Information
48kWh Battery Bank: Also backed by a 10-year warranty.
25kW Inverter: Comes with a 10-year warranty.
25kW Solar Panels: Available in any brand of your choice. (expandable up to 50kW)

If you need a second opinion or your setup is more complex, Talk to Fred About your System first.

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100Up Designed for Off the Grid Living.Solar, Inverter and Battery Sized Right

Based in Ballarat, Fred and the team design and install off-grid solar systems across regional Victoria.
REgional Victoria OFF-GRID INSTALLATION

Designed for Full Occupancy

We size for the home and its realistic future occupancy, and how you plan to use power today & in the future.

Built to Work through Worse Case Winters

We oversize arrays for dark Ballarat winter weeks, capturing enough energy in short sun windows to recover batteries fast.

Battery to Get Through Low Solar Days

48-Hour Battery Autonomy. Battery storage is designed to carry the household through consecutive low-production days. 

Redundancy Where Reliability Demands It

Where practical, dual inverters and distributed battery storage reduce single points of failure.
REgional Victoria OFF-GRID INSTALLATION

Off-Grid Solar, Installed Across Regional Victoria

Based in Ballarat, Fred and the team design and install off-grid solar systems across regional Victoria.
Ballarat
Bendigo
Geelong
Grampians
Castlemaine
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Ferdi Nuredinovski

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Fred installed our solar. Very honest very reliable. He goes above and beyond. Tries his best to help. Does a great job. I recommend.

Dino Papa

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Quotation & installation process. They have been unfailingly helpful and never failed to communicate pro-actively & effectively.

Andrew Webb

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Fred did a great job was extremely patient with the slow build Clean and tidy Explained what he was doing along the process

Darcy Joynson

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Fred installed our system 2 years ago and it has been fantastic. Fred was great and efficient, great communication. Highly recommended

Hayley Richards

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Updated our off grid solar. Cannot recommend this company enough. Fred is very Knowledgeable, honest and very reliable. Great Job.

Lesley

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Fred was so helpful. I'll know who to call. THANK YOU

Paul Purcell

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Very responsive and professional

Hugh Wareham

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100up Off Grid Solar Projects - Designed & Installed

Regional Victorian Home Owners 100% Off Grid with properties just like yours
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New Ballarat Home Gets Dual Sigenergy Inverters for 12kW Off-Grid Power with Built-In Redundancy

Two inverters. One system. Built-in redundancy from day one — if one fails, the other keeps running. This TwinGuard installation near Ballarat currently runs 12kW of solar on a newly built home and is wired to scale all the way to 24kW when demand grows.

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Ballarat Home Installs 20kW Off-Grid System for Full Household Power and EV Charging

A 20kW system doubles the winter energy headroom of a Ballarat home — enough to run all appliances, charge an EV, and build a buffer for the dull days that regional Victoria is famous for. Here is what that upgrade looks like in practice, and why the numbers work.

Sigenergy three-phase solar and battery system installation at a property in Ballarat Victoria
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Built for serious backup and EV charging. Ready for heavy loads, backup power, and smart energy setup that looks good too.

30kW of solar, a 25kW 3-phase Sigenergy inverter, four batteries, and a 25kW DC car charger — all fitted neatly into a Ballarat garage. A high-capacity off-grid build for a household serious about energy independence and EV charging at scale.

We Desgin, Supply & Install

Energy Independence & Protection

100up will help you plan and pick the best system to match your needs - give us a call
Access to Government Rebates
Remote Monitoring & Support
Complete System Documentation
Proven Components & Accredited Installers
White SIG battery unit positioned next to a dark solar panel against black background
100% OFF GRID
Built to handle real-world energy demand with confidence. The 25kW 3-Phase Commercial System is designed for reliable, long-term off-grid performance

25kW 3-Phase Commercial

Daily load
~ 46.875 kWh
Inverter
25kW
Battery
48kWh
SOLAR Arrary
25kW
$58-$64
-
After Rebate
Pricing Subject to Site Inspection, Roof & Ground SURVEY
Off‑grid systems designed by 100UP and installed by SAA‑accredited electricians using CEC‑approved products.
10+ Years Precision Installation

Ready to Plan your25kW 3-Phase Commercial System?

Talk to us about your property, your usage, and your timeline.
Call us direct on 1300 489 152 or send a text to 0400 092 621 — real advice from real off-grid solar installers.
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Local Ballarat Team ●  10 years in OFF GRID SOLAR
White SIG battery unit positioned next to a dark solar panel against black background
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Off-grid solar systems designed for reliable, long-term energy independence.
Off-Grid Solar Installation, Design & Support. Located in Ballarat
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