What's the best Solar Battery?

What’s the Best Solar Battery for Aussie Homes in 2025?

A No-Nonsense Guide to Picking the Right One for You

If you’ve made it this far into your solar journey, you’ve probably hit the big question:

“Which solar battery should I actually get?”

With brands like Tesla, Sonnen, Enphase, BYD and Alpha-ESS all pushing different claims, choosing the right battery can feel like buying a phone—with way more at stake.

So let’s break it down. No fluff. Just facts.

🏆 The Big Contenders in 2025

⚡ Tesla Powerwall 2

• Usable capacity: 13.5kWh

• Output: 5kW continuous

• Warranty: 10 years

• Why people love it: Proven, sleek, integrates well with most inverters, can join Tesla’s VPP

• Consider if: You want premium, reliable, and hands-off

🌱 Sonnen eco / Core+

• Capacity: Modular (5–15kWh)

• Why people choose it: German-made, great warranties, smart home integrations

• Consider if: You value longevity, want premium warranty, or eco-manufacturing

🔋 Enphase IQ Batteries

• Capacity: Small modular units (3.5kWh per unit)

• Good for: Fine-grain control, adding in stages

• Consider if: You want flexibility, or you’re space-constrained

🧱 BYD Battery Box + Alpha-ESS

• Capacity: Wide range, scalable

• Why they’re popular: Often better $$ per kWh, common in business and 3-phase setups

• Consider if: You’re value-focused or have higher energy needs

🤔 So… Which One Should You Get?

Ask yourself:

• Are you grid-connected or off-grid?

  • Most Aussies are grid-connected. Look for hybrid-compatible models.

• What’s your evening energy use?

  • If you're burning through 8–12kWh/night, you’ll want at least a 10–13kWh battery.

• Do you want backup power during blackouts?

  • Not all batteries offer it. Look for blackout-ready systems if that’s essential.

• Are you joining a Virtual Power Plant (VPP)?

  • Some batteries (e.g., Tesla Powerwall) make this seamless. Others don’t.

• Do you want to control or automate your usage?

  • All batteries store power. Smart systems, like those paired with the Jousto Energy Hub, help optimise when and how you use it.

💬 Still Not Sure?

That’s completely normal. In fact, most battery buyers choose incorrect size or type without guidance—and regret it later.

Let’s make it easy:

• 💬 Want expert help choosing and installing the right battery?
  👉 Get a tailored quote here →

• 🛒 Want to compare models and buy directly?
  👉 Browse our store →

Every home is different. That’s why we don’t push a one-size-fits-all solution.