People often think the most important component of a solar system is the solar panel. Yes, you definitely need a top-notch quality solar panel; however, for a solar system that will complete your energy requirements, especially when you live off the grid, you will require a quality system that includes an impeccable battery storage unit.
Without a good battery living off the grid can become an extremely challenging task because your chances of being energy independent highly depends on how much disposable energy you have at any point in time. So, it’s clear as a day that you have to have an excellent battery to live off the grid. So, what is the best battery for off grid solar? Before we answer that question, let’s quickly go through the different types of batteries for a better understanding.
Different Types of Battery for Solar Energy Storage
Are you searching for the best batteries for solar off grid? Here are a few different types of batteries popularly used for solar battery storage-
Lithium-ion Battery
Li-ion batteries have a variety of benefits over the other premium rechargeable battery technologies (nickel-cadmium or nickel-metal hydride). The energy density of these batteries is among the greatest available (100-265 Wh/kg or 250-670 Wh/L). Additionally, compared to Ni-Cd or Ni-MH battery technology, Li-ion battery cells have a voltage output of up to 3.6 Volts. They can thus supply substantial current for high-power applications.
Li-ion batteries are also portable, and their high DOD (Depth of Discharge) allows you to draw out more energy without threatening the battery life. They require a small space to sit and provide you with a huge power load in comparison to other batteries.
It is also popularly used in many cases alongside solar energy storage because of its usefulness and reliability.
Lead Acid Battery
These batteries are tried and tested veterans of the category. The most popular battery type in solar systems is the lead acid battery. In contrast to other battery types, lead acid batteries have a longer lifespan at a reasonable cost. There are two types of lead acid batteries which are –
- Flooded lead acid battery
- Sealed lead acid battery
Of the two types, sealed batteries are used for the most part because the flooded ones require constant maintenance; even so, you risk leaking. With a low DOD and high maintenance, sealed batteries are more often chosen over flooded ones.
What to Look For - Best Off grid Solar Battery
In order to find the best battery for your off grid solar home, you will need to look for the following attributes in your battery of choice-
Depth of Discharge
DOD signifies a battery’s capacity or energy held in them. Manufacturers provide you with a number in the form of dod below which your battery level should not drop down if you want to elongate its lifetime. This is one of the most important attributes that you need to know about. Remember, the higher the DOD, the better the battery is, and it will serve you for a longer time.
Usually, li-ion batteries provide a higher DOD than the lead acid batteries, which usually do not go beyond 80%. It’s essential to follow the manufacturer’s advice in this case.
Capacity
It is usually advised to upsize your off grid solar system so that you can yield more energy and keep that at your disposal. Also, to future-proof the house, you are required to upsize your solar system. In this case, you will also have to consider the capacity of the battery. Your solar system’s electricity generation ability should be on par with the battery.
Review your previous bills and know how many kilowatt hours of energy did you need on average. This will give you an idea of what capacity battery you will require. My advice would be to leave a little wiggle room and estimate a bit higher than you need just to be on the safe side.
Warranty
As your typical solar system comes with almost 25 years of official warranty, the solar battery of your choice has to suffice for that. Typically, solar batteries come with 10 to 15 years of warranty, depending on some criteria. You have to be careful when you choose your battery for your off grid home and abide by the manufacturer’s advice for prolonged battery life.
Off grid Solar Battery Examples
Here are some of the best off grid battery brands that have proven to win a lot of customers’ hearts with their performance in a short while –
BYD Battery
BYD – which stands for Build Your Dreams, is a Chinese battery manufacturing company. They have been focusing on producing li-ion batteries. The BYD battery boxes are known for their impressive power output, which is about 12.8kW.
Check out their different ranges here.
Huawei LUNA2000
Huawei is a leading brand in the solar industry manufacturing solar panels and batteries. The LUNA model has a 5kWh to 15kWh capacity to offer. It’s a Lithium-iron phosphate (LiFePO4) battery with claimed 100% DOD.
Check out Huawei LUNA2000 here.
Tesla Powerwall
Powerwall is such a battery that can store energy, detect outages, and take over as your home’s energy supply when the grid is down. It, as opposed to generators, Tesla Powerwall keeps your lights on, and your phones charged without maintenance, fuel, or noise. To keep your appliances operating for days, pair them with solar and use the sun’s energy to recharge.
Redback Smart Hybrid
With 4.8kWh – 28.4 kWh battery storage capacity and a 10-year Australian-supported warranty, Redback is one of the spectacular choices available in the market. They also provide optional expansion cabinet, which is amazing for those who might need to do so in the future.
Check out Redback Smart Hybrid here.
That sums up the discussion about what is the best battery for off grid solar. If you want to discuss your options for going off the grid, do not hesitate to reach out to us. Learn more about Solar Emporium’s off-grid solar system packages with batteries- here.   Â
