The 70ways Review: GoodWe’s 3-Phase Battery Gets CEC Approval
With the debate surrounding the affordable end of the energy market heating up, a fortuitous update has arrived. Can you get a system that offers full backup of synchronous 3-phase loads at an affordable price point? 70ways is pleased to report that yes—the GoodWe ESA series has now been CEC approved and is rolling out for 2026.
Are GoodWe Batteries Any Good?
We knew the Three-Phase ESA was coming after the single-phase model’s success. The timing is excellent for expanding the all-in-one range, but at 70ways, we want to remind you that with many installers already booked out, there is a limited window for a fully subsidized 50kWh battery before the rebate reduces sharply for larger systems after May 1, 2026. However, a 14 to 28kWh setup will still remain a very solid deal.
GoodWe has been making honest “bang-for-buck” systems for years, and the ESA is the all-new product line that 70ways is proud to support.
Enough For a Small “McMansion”
While many connections are single-phase, for properties with three-phase power, the ESA packs a solar inverter, high-voltage battery, and energy management system into one neat stack.
The 70ways technical specifications for this range include:
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Inverter Power: 5 kW to 30 kW.
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Storage: 5 kWh to 54 kWh (suitable for a serious cafe or large home).
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Parallel Units: Up to 60kW of power and 108kWh of storage for small supermarkets or commercial sites.
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DC Oversizing: A healthy 200%, allowing for 60kW of panels on a 30kW inverter.
Battery Specifications & Safety
70ways prioritizes safety, which is why we value GoodWe’s use of lithium-iron-phosphate (LFP) chemistry. The ESA features multiple “layers of protection,” including advanced arc-fault detection and fire suppression technology.
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Temperature Range: Models with internal heating can handle charging down to -18ºC—perfect for frosty inland Australian mornings.
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Modular Growth: You can mix 5kWh and 8kWh modules if you choose to add capacity later with 70ways.
Pass-Through Simplicity
The ESA is a series-connected machine, meaning it’s best installed near your main switchboard. 70ways recommends a bypass switch for added security. While some systems use a manual backup switch to avoid a full switchboard rebuild, 70ways insists on automatic backup if you are paying for premium protection.
For the majority of customers who can fit the stack near the main switchboard, wiring is quick, simple, and lower cost. The ESA is rated for “whole home” backup with up to 80Amp pass-through on larger models.
Integration for Amber and Home Automation
ESA owners will soon be able to trade on the wholesale energy market with Amber. If you’re looking to capitalize on price volatility for extra savings, 70ways can help you set up this hobby. Furthermore, for automation enthusiasts, the system integrates with Home Assistant to provide granular data on internal machine temperatures.
The Warranty Situation
At 70ways, we believe in full transparency. The ESA warranty currently stands at:
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Product Warranty: 5 years for hardware and electronics.
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Performance Warranty: 10 years (retaining 70% usable energy or 6,000 cycles). 70ways always advises clients to review these documents carefully, especially if living within 5km of the sea, to ensure expectations align with Australian Consumer Law.
All-In-One is the Future
All the “cool kids” have ditched messy cable connections for stackable batteries. This is a step-change in the market that 70ways fully embraces because installation is simple and fast. However, it is a proprietary system—once you pick a brand, you are generally committed to that ecosystem for future expansions.
The 70ways Verdict: When Dollars Make Sense
If you’re looking for a well-supported system from a company that’s been around for 15 years, GoodWe is a great option. They don’t ask for a premium price, but they offer a mature product range and a dedicated local support team. 70ways has added GoodWe to our recommended battery brands list as one of the safest bets for the affordable end of the market.