Solar power battery storage is revolutionizing they way people use and consume solar power. It offers numerous benefits and solutions for maximizing the efficiency and utilisation of solar energy.
The average household typically consumes electricity during the morning and evening hours when solar power generation is not at its peak. This mismatch in consumption and generation patterns (as seen in the graph below) can be addressed with battery storage, allowing homeowners to make the most of their solar power system.
In New Zealand, solar-powered battery storage systems, also known as solar battery banks, are gaining popularity due to falling prices and technological advancements. In fact, approximately one-third of all new solar installations in the country now include batteries.
Lithium-type batteries are the most common technology used for solar storage. Tesla Powerwall is one of the big names that is leading the charge in the solar battery marketplace.
Prioritised for maximum efficiency, solar power is sent to where it is needed most.
Solar batteries are highly recommended when surplus solar power would otherwise be exported to the grid during peak solar production hours. Solar batteries function by taking excess solar electricity (shown in the yellow bell shaped curve) and storing the electricity in batteries. By storing this excess electricity, users can consume power whenever they like, typically during non-sunny hours like evenings or cloudy days.
Solar batteries offer several advantages, including:
The price range for solar batteries is roughly $6,000 to $20,000 NZD. Typically the more storage a battery has, the more it will cost. Other factors that affect the price are the capabilities of the battery, quality of the battery, chemistry used and how long it’s expected to last.
Here’s a quick rundown of some of the products available on the market along with their estimated price:
|Solax Triple Power
|Lithium Nickel Manganese Cobalt Oxide
|Huawei Luna2000 10 KWH
|Lithium Iron Phosphate
|BYD Premium HVM
|Tesla Powerwall 2
|Lithium Nickel Manganese Cobalt Oxide
|7kW peak / 5kW continuous
Please note these prices are rough estimates. For accurate quotes, fill in our quote request form here for 3 free quotes.
Solar batteries can be set to power appliances when there is a blackout, or during a power outage. Note: not all batteries offer this feature, be sure to ask when making a purchase.
Here's how solar batteries work in a power outage:
Because such low rates are paid for exported solar power (roughly 8-12 cents per kWh), sending power to the grid is the last priority for the solar power system.
Solar power will be sent to (1) appliances first (if they are switched on), and then to the batteries (2). Only if there is additional excess solar power will the system export solar power to the grid.
A solar battery allows homes and businesses to store excess solar electricity and use it when it’s needed most. Here’s a shortlist of why this is a good thing:
For Power Security - Yes! If you are sick of power outages, or the idea of not having power for a day makes you nervous, then absolutely, solar batteries can be sure to provide a home or business with power during a blackout.
For Financial Return - Maybe not quite yet. A solar battery is likely to reduce a solar power systems return on investment and lengthen the payback period.
To Reduce Power Bills - Yes! A battery will reduce those pesky power bills on top of the savings already made with a solar power system.
Battery storage technology; it's a race to develop the ultimate solar battery storage system. Lithium-ion battery technologies are the most common battery on the market. Lithium-ion batteries are smaller, lighter and store more energy than traditional lead-acid batteries.
Lithium-ion batteries are found in mobile phones, laptops and electric vehicles - increased demand for these products has prioritised economies of scale for lithium-ion, with the cost dropping roughly 20% each year.
The reason lithium-ion is used for solar batteries includes:
Fear not, savvy and smart early adopters of solar technology. Existing grid-connected solar power systems can be retrofitted to include a solar battery bank. The best battery configuration for retrofits is often an AC-coupled battery.
Having a battery ready solar power system is an excellent option if a user is considering adding solar storage at a later date.