10 kW photovoltaic installation in UK (see costs)

In an era of increasing environmental awareness and rising energy costs, solar batteries have emerged as a game-changing solution for homeowners seeking sustainable power alternatives. These innovative devices store excess energy generated by solar panels, providing a reliable source of electricity even when the sun isn't shining.

10 kW photovoltaic installation in UK (see costs) Image by StockSnap from Pixabay

How do solar batteries work in conjunction with solar panels?

Solar batteries work in tandem with solar panel systems to maximize energy efficiency. During daylight hours, solar panels convert sunlight into electricity, which is then used to power your home. Any excess energy generated is stored in the solar battery for later use. When solar panels aren’t producing electricity (such as at night or on cloudy days), the stored energy in the battery can be utilized to meet your household’s power needs.

What are the benefits of installing a solar battery system?

Installing a solar battery system offers numerous advantages for homeowners. Firstly, it reduces reliance on the grid, leading to lower electricity bills and increased energy independence. Secondly, solar batteries provide backup power during outages, ensuring your home remains operational even during blackouts. Additionally, by storing and using clean energy, you’re actively reducing your carbon footprint and contributing to a more sustainable future.

What types of solar batteries are available in the market?

Several types of solar batteries are available, each with its own set of characteristics. Lithium-ion batteries are currently the most popular choice due to their high efficiency, long lifespan, and compact size. Lead-acid batteries, while less expensive, have a shorter lifespan and lower efficiency. Saltwater batteries are a newer, more environmentally friendly option, though they’re less common. The choice of battery depends on factors such as budget, available space, and energy requirements.

How much energy can a solar battery store?

The storage capacity of solar batteries varies widely, ranging from 1 kWh to 20 kWh or more for residential systems. A 20kW solar system with battery storage can typically store between 10 to 15 kWh of energy, which is sufficient to power an average home for several hours. The exact amount of energy a battery can store depends on factors such as the battery’s chemistry, size, and design.

What factors should you consider when choosing a solar battery?

When selecting a solar battery, several factors come into play. Storage capacity is crucial – ensure the battery can meet your energy needs during non-productive hours. Depth of discharge (DoD) indicates how much of the battery’s capacity can be used without damaging it. Look for batteries with higher DoD rates. Round-trip efficiency measures how efficiently the battery can convert stored energy back into usable electricity. Additionally, consider the battery’s lifespan, warranty, and compatibility with your existing or planned solar system.

How much does a solar battery system cost and what are the top providers?

The cost of a solar battery system varies depending on factors such as capacity, brand, and installation complexity. In Australia, prices for solar batteries typically range from $5,000 to $15,000 or more for a complete system. Here’s a comparison of some popular solar battery options available in the Australian market:


Product/Service Provider Cost Estimation
Powerwall 2 Tesla $11,700 - $12,700
LG Chem RESU LG $7,000 - $9,000
Sonnen eco Sonnen $11,000 - $15,000
Enphase AC Battery Enphase $2,000 - $2,500 per 1.2kWh module
Redback Smart Hybrid System Redback Technologies $8,000 - $10,000

Prices, rates, or cost estimates mentioned in this article are based on the latest available information but may change over time. Independent research is advised before making financial decisions.


Solar batteries represent a significant investment in sustainable power solutions. While the upfront costs may seem high, the long-term benefits of reduced electricity bills and increased energy independence often outweigh the initial expense. As technology advances and production scales up, we can expect solar battery prices to become more affordable, making this sustainable power solution accessible to a broader range of homeowners.

The shared information of this article is up-to-date as of the publishing date. For more up-to-date information, please conduct your own research.