What type of household battery should you choose?

Home backup batteries are crucial for ensuring energy needs are met when solar power is unavailable. In this article, we will explore three main types of batteries for home backup solutions: Lead-acid, Lithium-ion, and Flow batteries. Understanding the pros, cons, and applications of each type will help you select the best option for your home.

1. Lead-Acid Batteries: The Affordable Option

Lead-acid batteries are one of the oldest and most commonly used energy storage solutions. They are favored for their low cost but come with several drawbacks.

Pros:

• Low Cost: Lead-acid batteries are the most affordable, making them a good choice for homeowners on a budget.

• Widely Available: They are easy to find and come in various sizes.

Cons:

• Short Lifespan: They typically last between 5 to 10 years.

• Maintenance: They require frequent checks and proper ventilation.

• Space Requirements: They are bulkier than lithium-ion and flow batteries.

Safety Concerns: Lead-acid batteries are generally safe when installed and maintained properly. Improper installation or poor ventilation can cause safety risks, so professional installation and maintenance are recommended.

Major Brands: Trojan and Deca are the primary manufacturers of lead-acid batteries.

2. Lithium-Ion Batteries: The Popular Choice

Lithium-ion batteries are the most popular choice for home backup due to their higher energy density, longer lifespan, and minimal maintenance needs.

Pros:

• Higher Energy Density: They store more energy in less space.

• Longer Lifespan: Lithium-ion batteries typically last 10 to 15 years.

• No Maintenance: They require minimal upkeep for homeowners.

Cons:

• Higher Initial Cost: The upfront price is higher, but the long lifespan and low maintenance make them a good investment.

Safety Concerns: While generally safe, lithium-ion batteries can pose risks such as overheating or short-circuiting if damaged or improperly installed.

Major Brands: Leading manufacturers include SolarEdge, Tesla, LG Chem, Generac, Enphase, and Franklin. These brands are known for their reliability.

3. Flow Batteries: The Future of Energy Storage?

Flow batteries are an emerging technology that offer unique advantages, such as a longer lifespan and deeper discharge capabilities.

Pros:

• Extremely Long Lifespan: Flow batteries can last up to 30 years.

• 100% Depth of Discharge: Unlike other batteries, flow batteries can be fully discharged without damaging the cells.

• Low Maintenance: They require minimal upkeep.

Cons:

• High Cost: Flow batteries are expensive compared to lead-acid and lithium-ion options.

• Low Energy Density: They require more space for the same energy storage, which can be an issue for homeowners with limited space.

Safety Concerns: There are no major safety concerns yet, but this may change as the technology advances.

Major Manufacturers: As flow batteries are still new, fewer manufacturers exist in the residential market, but this is expected to grow.

Which Battery is Right for You?

When selecting a home backup battery, consider these factors:

• Budget: If you are on a budget, lead-acid batteries may be suitable, but be aware of higher maintenance costs.

• Space Availability: Lithium-ion batteries are ideal for homes with limited space due to their high energy density.

• Long-Term Investment: Lithium-ion batteries are a great long-term option for those who can afford the higher initial cost.

• Energy Needs: For larger energy storage needs, flow batteries may be a good future solution, though they are not yet widely available for residential use.

  
  

Why Choose Lithium-Ion Batteries?

We primarily offer lithium-ion batteries because of their high energy density, long lifespan, and low maintenance. Compared to lead-acid and flow batteries, lithium-ion batteries offer the most practical and reliable solution for home backup. They are compact, require little upkeep, and are designed for long-lasting performance.

Brands We Recommend: We primarily use SolarEdge batteries, along with some Enphase options, and are also exploring Franklin as an alternative.

Calculate Your Battery Needs

If you're unsure about how many batteries or inverters you need, check out our easy-to-use battery calculator. By entering your household’s energy loads (e.g., washer, dryer, TV), the calculator will estimate how many batteries and inverters you need, along with the approximate cost. Click the link below to learn more about how solar energy storage can work for you!