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Product Information Disclaimer:

Product specifications, pricing, and availability are subject to change without notice. We make no warranties regarding product performance, longevity, or suitability for your specific needs.

Always verify specifications with the manufacturer and installer before purchase. Warranty terms are set by manufacturers and may have conditions not disclosed here. Battery performance degrades over time.

Installation guide · Site preparation

Preparing the slab

A plain guide to the concrete pad a home battery usually sits on — so your site is ready before our installers arrive. Treat the depths below as a general starting point; your installer and the battery's manufacturer confirm the exact pad for your site, soil and system.

Cross-section of a typical battery slab — indicative proportions, not to scale.

The layers, as a general guide

Bottom to top. Ranges are typical — the exact figures come from your installer and the battery's own installation manual.

Pad footprintA single wall-format battery; larger for multi-module systems, plus clearances.: 900 × 900 mm min1200 × 1200 mm gives comfortable working room
BaseCompacted crushed rock, well consolidated.: 100–150 mm
BeddingCoarse sand, screeded flat; a damp-proof membrane usually goes on top.: 25–30 mm
Concrete slabUsually steel-mesh reinforced. Thicker for heavier batteries — see below.: 75–100 mm+heavier / multi-module: 100–150 mm+
FinishThe single most important part.: level & well-drained

Match the depth to the weight

A home battery is heavy — a single unit is often 100–150 kg, and multi-module systems far more. The heavier the system, the thicker the slab. Your installer confirms the depth for your battery.

~75–100 mm

Lighter single battery

~100 mm

Larger single / two-module

100–150 mm+

Heavy multi-module system

How to prep the slab

A six-step sequence a builder or competent DIYer can follow — or hand to your concreter.

Mark out the pad.
At least 900 × 900 mm; 1200 × 1200 mm gives room to work and for future modules. Check the spot against the battery's clearance rules.
Excavate and compact the base.
Lay and compact 100–150 mm of crushed rock so the ground underneath can't settle.
Add the bedding layer.
Screed 25–30 mm of coarse sand flat, then lay a damp-proof membrane over it.
Pour the concrete.
Commonly 75–100 mm, and thicker (100–150 mm+) for heavier or multi-module systems — usually over steel mesh. Your installer or concreter confirms the depth and reinforcement for your battery's weight.
Get it level.
The finished surface must sit true. A battery on an out-of-level pad can void its warranty.
Drain it, then let it cure.
Grade the surrounds so water sheds away and can't pool or soften the ground beneath the base. Let the slab cure (commonly about a week) before the battery is mounted.

The installer's spec always wins

This is general preparation guidance, not a fixed specification. The right pad depends on your battery's weight and footprint, your soil, and local conditions — and every manufacturer (Tesla, Sungrow, BYD, Sigenergy and others) publishes its own pad and mounting requirements, some of which mount the unit on a wall bracket rather than a slab. Confirm the exact pad with your installer and the battery's installation manual before you pour. If in doubt, ask us and we'll match you with an installer who'll set it out for your site.

What to read next

Adding a battery to existing solarHybrid vs non-hybrid inverters, AC/DC coupling and retrofit options.AC vs DC coupled batteriesHow the two wiring approaches differ, and which suits your existing solar.Find my batteryMatch a battery to your home, then see what preparing the site involves.

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Solar Battery Perth · independent WA battery comparison · indicative site-preparation guidance, not an engineering specification · confirm with your installer and the manufacturer's installation manual.