Southland's cold, cloudy winters and a history of grid outages make battery backup a genuine consideration for Invercargill homeowners, not just a solar add-on. We've verified which local installers actually have the accreditation and track record to back up a battery quote.
This page highlights the Top 4 battery storage installers in Invercargill, based on independent research into reputation, accreditation, service quality and overall reliability.
The top 4 battery storage installers in Invercargill are 1. World Solar NZ, 2. Awarua Synergy, 3. Sunshine Solar, 4. Infinite Energy NZ Limited. Below we explain why each made the list, compare them at a glance, and share how to choose.
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World Solar's head office is on Dee Street in Invercargill, and the company is a SEANZ member with a specific focus on battery brands including Tesla Powerwall and Sig Energy. Their Google Business Profile is genuinely based in Invercargill, and the business has installed over 9,000 solar PV systems across Australasia.
A locally owned Southland business at 117 Eye Street, Invercargill, operating for over 20 years (originally developed from the Bluff Healthy Homes project in 2004). Alongside insulation and heating, Awarua Synergy installs solar and battery storage systems for Southland households.
A national New Zealand solar and battery installer with 22+ years' experience and over 8,000 installations, Sunshine Solar runs a dedicated Invercargill service page and is an active SEANZ member. Its head office is in Christchurch rather than Invercargill, so it operates in Southland as a servicing installer rather than a local branch.
Founded in 2013 by the Wilson and Heal families in Central Otago, Infinite Energy is a SEANZ-listed hybrid solar and battery specialist; over half its installations since 2017 have included a battery component. Its base is Cromwell, and it lists Southland (including Invercargill) within its lower South Island service region.
A quick comparison of our Top 4 picks. Select up to 3 businesses above to compare their strengths side by side.
| Battery Storage Installer | Best for |
|---|---|
| World Solar NZ | Tesla Powerwall and premium battery brands |
| Awarua Synergy | Locally embedded Southland operator with a long track record |
| Sunshine Solar | Large-scale national installer with strong review volume |
| Infinite Energy NZ Limited | Hybrid solar-plus-battery system design |
Independent, editorial, and reviewed regularly.
TopChoice rankings are editorially curated by our New Zealand team and reviewed periodically. Our shortlists draw on public reputation signals from Google and other platforms, alongside our own research into each battery storage installer. We weigh up a combination of:
We don't accept payment in exchange for a place in the Top 4. Rankings may change over time as businesses evolve. See how TopChoice works.
Correct sizing matters more than brand. An installer should size a battery around your household's actual daily usage and Southland's shorter winter solar generation window, not just sell you the biggest unit available. Ask for a SEANZ-accredited installer, and confirm the electrical work will be carried out or signed off by an EWRB-registered electrician, since battery systems involve certified electrical connection work.
Not every battery setup keeps your power on during an outage by default; ask specifically whether the system includes backup capability, and get the warranty terms in writing, including battery cycle life, inverter cover and what happens if the installer stops trading. A reputable Invercargill-area installer will be upfront about all of this before you sign.
A residential battery typically costs between $10,000 and $20,000 installed, depending on capacity, brand and whether it's paired with new or existing solar panels. Get quotes from at least two accredited local installers before deciding.
No. Batteries can be installed on their own and charged from the grid on off-peak rates, though pairing one with solar panels generally gives the best return, since it lets you store your own generated power instead of exporting it cheaply.
Only if the system is specifically designed and wired for backup power. Not all grid-tied battery installations include this feature by default, so confirm with your installer whether backup/emergency power is part of the system before installation.
Most home batteries carry a manufacturer's warranty of 10 years or a set number of charge cycles, whichever comes first. Always check whether the warranty is backed by the manufacturer directly or only by the installer, and confirm what happens if the installer ceases trading.
It depends on your power usage patterns, existing solar setup and appetite for backup resilience during outages. Southland's shorter winter daylight hours reduce solar generation, so batteries here are often valued as much for grid-outage backup and time-of-use savings as for maximising self-consumption of solar.
Editorial disclosure: TopChoice is an independent editorial platform. Some pages may include a clearly labelled TopChoice Spotlight placement for additional visibility, which never influences rankings within our Top 4 lists. See how TopChoice works.
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