Blog Layout

Solar Battery Guide

TheCamel Designer • June 3, 2022

What is a solar battery?

This is an appliance used to store electricity for later usage, so you can keep devices operational in case of an outage, utilize more of the solar energy you generate in your household, and even save on electricity bills in some instances. They are usually known as ‘deep cycle batteries’ because of their capability to discharge and charge a considerable amount of electrical energy than a car battery.


What to search for in a household solar battery: six measurements to take into account


Energy storage appliances offer various advantages, from providing emergency power to even monetary savings. Nevertheless, they also come with technical difficulties and a host of unfamiliar jargon. Here’s are some of the areas to concentrate on and be on the watch for in a deep cycle solar battery:


How to determine which battery specifications matter to you


There are various prospective decision benchmarks and comparisons to make when assessing your energy storage alternatives. Here are some of the most standard decision criteria, together with which battery specifications make a difference if these conditions correspond with your circumstance.


If you want more of your household powered simultaneously, go for a solar battery that has a high-power score. 


If you are looking to run a more energy-intensive device (such as a sump pump), go for a battery that has a high instantaneous power score.


If you are looking to power your household with your battery for an extended duration of time, go for a solar battery that has an elevated usable capacity.


If you are looking to harness every kilowatt-hour of electricity that is in your solar battery, go for batteries that have a greater roundtrip efficiency.


If you have limited space and are looking to maximize storage out of the constricted amount of space you’ve got, go for nickel manganese cobalt lithium-ion batteries. 


If you are looking for a battery with a prolonged lifespan that you’ll be able to cycle the most times, go for lithium iron phosphate (LFP) batteries.


If you are in the market for a battery with the greatest safety rating (they are all safe to use, don’t worry), go for LFP batteries 


Power rating


The power rating score of a solar battery represents the kilowatts (kW) of electrical energy that the battery can generate at a go. To put it differently, the power rating score of a battery informs you the number of devices your battery can run simultaneously and which devices those are. 


Power is denoted either in Amps or in kilowatts (thousands of Watts), and various electrical devices use different power levels. For example, a standard fluorescent bulb will utilize 12 Watts (or 0.012 kW) of electrical power units, while a 3-ton AC unit will use 20 Amps, which equates to 4.8 kW. The majority of batteries these days have a constant power output of about 5 kW.


Most importantly, solar batteries usually come with two varying power ratings – an instantaneous power score and a continuous power score – which means that power can be generated in short bursts. This is essential if you’ve got a device, such as a sump pump that needs a considerable amount of energy to switch on but then operates at a decreased power.


Battery size/usable storage capacity


The size or capacity of a battery is basically the measure of electricity that a battery is capable of storing and supplying to your household. Whereas power is denoted in kW, battery capacity is denoted in kilowatt-hours (kWh)–power multiplied by time. The storage capacity of a battery lets you know the duration your battery can run sections of your household. Make a point of checking the battery’s usable capacity since that figure shows the measure of stored electricity that is accessible in the battery.


Given how electricity usage denotes power x time, using large amounts of power will make stored electricity run out faster. On the other hand, if your battery is used to backup a couple of appliances with relatively low power usage, you can keep them operational for an extended duration of time. So, this means that the battery’s size is a bit misleading as the duration of time the charge of the battery will last is influenced by the amount of electrical current that the battery is emitting. 


Look back at the example shown above between the difference of an AC unit and a light bulb. If you’ve got a 5, 10 kWh battery, you’ll be able to power your AC unit for only two hours (4.8 kW * 2 hours = 9.6 kWh). But that identical battery will be capable of running 20 lightbulbs for two days 636-757-3083 kW * 20 lightbulbs * 42 hours = 10 kWh).



How many solar batteries do you require to run your household?


The number of solar batteries you require can contrast and will be contingent on the purpose of your energy storage system and the specs of your home devices. There are numerous questions you’ll have to ask yourself: the duration you’re looking to remain battery-powered, what sort of production your panels receive, what electrical devices are a must to keep on, and the list continues. 


Although we can’t say for sure the number of batteries you’ll require, we’ve stipulated the stages you can take to begin doing the calculations in our guide about the sections of your home you can keep running on batteries. You can also have a look at our article guide on going off-grid with batteries and solar, where we outline some math examples on how many batteries you need to keep your household completely battery and solar-powered. 


Roundtrip efficiency


This refers to a system-level metric that gauges the functionality of energy storage system (inverter + battery) changes and stores electricity. There are losses affiliated with any electrical action. You’ll lose some amount of electricity when inverting it from DC electricity to AC electricity or when inputting electricity into a battery and using it again. The roundtrip efficiency of a solar battery enables you to know the number of electrical units you’ll harness out of a single battery for each electrical unit you input. 


Battery lifetime: throughput and cycles


Battery lifespans are determined using three metrics: expected operational years, expected cycles, and expected throughput. The expected throughput and cycles of a battery are similar to that of a vehicle’s mileage warranty. Throughput allows you to assess the amount of electricity you can transmit through your battery over the course of its lifespan. Cycles determine the number of times you can discharge and charge a battery.


To change the warranted or expected throughput of a battery into an expected shelf life, divide the throughput (kWh)by the usable battery capacity to approximate the number of complete cycles you’ll receive from your battery, and divide that sum of complete cycles by the days found in 1yr: a throughput of 30,000 kWh using a 10 kWh battery translates to a cycle/per for 8.2 years or 3,000 expected cycles.


To change the warranted or expected number of cycles of a battery into an expected shelf life, divide the cycles by the number of days found in a year: a 2,000 cycle warranty will translate to a cycle/per for 5.5 years.


Safety


Every solar battery in the market is required to satisfy certain safety caveats in order to be approved for installation in businesses and homes. However, there are a few battery chemistries that have been evaluated for safety to varying levels, superseding even the government-set safety standards for batteries, which means that some battery chemistries are a bit safer when compared to others. 


Chemistry


The chemistry of a battery denotes the main compound that is utilized for storing electricity in the battery. Chemistry is by far the most integral property to assess as it will ultimately play a hand in most of the battery properties listed. For example, various lithium-ion chemistries may be extra power dense – this means they store additional electricity in a small space –or are better at cycling– which means they run efficiently for more years. And those are but a few of the distinctions in lithium-ion chemistries, saying nothing of the contrast between lead-acid batteries, or vanadium flow batteries, or lithium-ion batteries, or other experimental battery chemistries. Similar to most appliances, various solar battery chemistries come at varying price points.



What is the best solar battery?


It’s difficult to pick one out. The best solar battery for your case will be contingent on various factors, from the amount of space in your house to the properties of your solar installation and even what you’ll be looking to gain from an energy storage unit. If you’ve got a big household with numerous appliances, you should consider acquiring a high-capacity battery that can generate electricity for a long period. If you’re budget-conscious and are more concerned about maximizing the solar energy system, going for a small battery with good battery integration may be better.

By Jack Casey February 21, 2025
As energy prices fluctuate and homeowners look for ways to cut costs, solar power continues to prove itself as the most affordable and reliable energy source. According to the latest data from Lazard , onshore wind and solar photovoltaics (PV) are among the cheapest sources of electricity in 2024—even without government subsidies. For homeowners in Missouri and Illinois , this means there's never been a better time to make the switch to solar with SunSent Solar , the region's trusted expert in solar installations.
By Jack Casey February 19, 2025
When designing a solar system for your home, one of the most important decisions is choosing the right type of inverter. Inverters are responsible for converting the Direct Current (DC) power generated by your solar panels into Alternating Current (AC) power that can be used in your home. There are two main types of inverters: microinverters and string inverters. The type you choose will impact your system's efficiency, cost, and monitoring capabilities. As the leading solar experts in Missouri and Illinois, SunSent Solar is here to break down the differences and help you determine the best fit for your home.
By Jack Casey February 18, 2025
One of the first questions homeowners ask when considering solar is, “Can my roof support solar panels?” At SunSent Solar & Roofing , we’ve helped countless homeowners across Illinois and Missouri find the best roofing and solar solutions for their homes. The good news? Solar can be installed on almost any roof type. However, some materials are better suited for solar panels than others. In this guide , we’ll walk you through the five most common roofing materials and their compatibility with solar panels, so you can make the best choice for your home.
By Jack Casey February 13, 2025
Understanding AC vs. DC: How Solar Power Works When it comes to solar energy, homeowners often come across the terms AC (alternating current) and DC (direct current). While these might sound technical, understanding the difference is key to making informed decisions about your solar energy system. At SunSent Solar , we specialize in helping Midwest homeowners navigate these essential concepts to get the most out of their solar investment. What is Alternating Current (AC)? AC, or alternating current, is the standard form of electricity used in homes and businesses. It constantly changes direction, moving back and forth to allow for efficient long-distance transmission. This is the type of electricity that powers everyday appliances like refrigerators, televisions, and lights. Because the power grid runs on AC, any solar energy generated must be converted from DC to AC before it can be used in a home.
By Jack Casey February 10, 2025
Choosing the right roofing contractor is one of the most important decisions a homeowner can make. A new roof is a significant investment, and the quality of installation can impact your home’s value, energy efficiency, and longevity. With so many contractors available, how do you separate the best from the rest? Here’s what you need to consider when selecting a roofing company—and the red flags you should avoid.
By Jack Casey February 7, 2025
Kilowatts vs. Kilowatt-Hours: What’s the Difference? If you're considering solar energy, you've likely come across the terms kilowatt (kW) and kilowatt-hour (kWh) . While they sound similar, they measure different things and play distinct roles in understanding energy production and consumption. Let’s break it down. What is a Kilowatt (kW)? A kilowatt (kW) is a unit of power, measuring the rate at which electricity is used or generated at a given moment. Think of it like the speedometer in a car—showing how fast you’re going at any instant. Example: A 5 kW solar system can generate up to 5 kilowatts of power at peak sunlight. Application: Solar panel systems are rated in kilowatts, indicating their maximum output under ideal conditions. What is a Kilowatt-Hour (kWh)? A kilowatt-hour (kWh) is a unit of energy, measuring electricity consumption or generation over time. This is similar to the odometer in a car, which tracks total distance traveled rather than speed. Example: Running a 1 kW appliance for 1 hour consumes 1 kWh of energy. Application: Your utility bill is based on kWh, reflecting how much energy your home uses. How Do kW and kWh Work in Solar Energy? Understanding the relationship between kW and kWh is key when evaluating solar energy benefits. Solar Panel Output: A solar panel rated at 300 watts (0.3 kW) produces that amount of power under peak conditions. Over 3 hours of sunlight, it generates 0.9 kWh (0.3 kW × 3 hours). System Size vs. Energy Production: A 6 kW solar system might generate 30 kWh per day , depending on sunlight conditions. Electricity Bills: Since utilities charge per kWh, knowing how much your solar system offsets can help calculate savings. Why Does This Matter? Understanding kW and kWh is essential for making informed energy decisions: Choosing the Right Solar System: A system’s kW rating tells you its capacity, while kWh helps estimate energy savings. Battery Storage: If you’re considering battery storage, its capacity is measured in kWh, indicating how much energy it can store for later use. Electric Vehicles (EVs): EV batteries are also rated in kWh, showing how far a full charge will take you. Understanding kWh: Frequently Asked Questions At SunSent Solar , we know energy consumption can be confusing, and we’re here to clear things up. Below, we’ve compiled some of the most common questions about kilowatt-hours (kWh), energy usage, and how solar can help reduce your electricity costs. Let’s dive in! How Much Electricity Does the Average Home Use Per Day? Energy consumption varies based on home size, location, climate, and appliances. However, the U.S. Energy Information Administration (EIA) reports that the average American household consumes around 30 kWh per day . Your actual usage may be higher or lower depending on factors like insulation, energy-efficient appliances, and personal habits. What Is the Average Household Electricity Consumption Per Month? Based on national averages, most households use around 877 kWh per month . This can vary significantly by region—states like Louisiana tend to use more (about 1,240 kWh per month), while Hawaii has much lower consumption (around 505 kWh per month) due to climate and energy costs. How Many kW Does a Generator Need to Power a Home? If you’re considering backup power, most essential household appliances can run on a generator producing 5,000 to 7,500 watts (5-7.5 kW) . A generator at this capacity is generally enough to power refrigerators, water heaters, lighting, and other key appliances during an outage. However, larger homes or those with central air conditioning may require a higher-capacity generator. How Can I Calculate the Energy Consumption of My Appliances? To determine how much electricity an appliance uses, follow these steps: Find the wattage of the device (often labeled on the appliance or in its manual). Multiply wattage by hours used per day to get watt-hours (Wh). Divide by 1,000 to convert watt-hours to kilowatt-hours (kWh). Multiply the daily kWh by the number of days in a month to estimate your monthly usage. How Can I Determine My Total Household Energy Consumption? The easiest way is to check your electricity bill—it will list your total kWh usage for the billing period. If you want to estimate it yourself, add up the kWh usage of all your appliances based on the method above. Many modern appliances also list their estimated annual kWh consumption, which can help you make more energy-efficient choices. How Many kWh Does It Take to Charge a Tesla? Electric vehicle charging depends on battery size and state of charge. For example, a Tesla Model 3 Standard Range typically requires about 50 kWh to charge from empty to 90%. Home charging can take over 12 hours , while Tesla Superchargers can deliver around 75 kW for a much faster charge in under an hour. Why Does Understanding kWh Matter? Knowing how kWh works can help you make smarter energy decisions, whether you’re considering solar panels, backup power, or simply reducing your electricity bill. SunSent Solar specializes in designing solar solutions that fit your energy needs, ensuring that your home or business can generate and store power efficiently. Have more questions about kWh, solar energy, or how you can reduce your electricity costs? Contact SunSent Solar today—we’re here to help! You can also read our past blog post, Solar Cost per kWh vs Utility Cost per kWh.
By Jack Casey February 5, 2025
Storms in Missouri and Illinois can take a serious toll on your roof, whether it’s high winds, hail, or heavy rain. Knowing what to do after a storm can save you from bigger headaches down the road. At SunSent Solar and Roofing , we’re the go-to experts for all things roofing, helping homeowners assess damage and make informed decisions about repairs and replacements.
By Jack Casey February 3, 2025
For many homeowners, energy independence is the dream. Relying on traditional grid power comes with the constant worry of blackouts, rising electricity costs, and unpredictable outages. That’s why so many people are making the switch to solar energy. But having solar panels alone isn’t enough—you need a reliable way to store that energy for use when the sun isn’t shining. That’s where batteries come in, and one name that often comes up is EG4. But are EG4 batteries truly the best option for your solar setup? Let’s break it down.
By Jack Casey January 31, 2025
Power outages are becoming more frequent, leaving homeowners vulnerable to blackouts when they least expect it. While solar energy is an excellent way to power your home, it doesn’t automatically protect against outages. That’s where battery backup systems come in —allowing you to store and use energy whenever you need it most.
By Jack Casey January 29, 2025
A roof replacement is a major investment, but it’s essential for protecting your home and maintaining its value. If you live in St. Louis , Missouri , or Illinois , understanding the cost factors and timing for replacing your roof is crucial. SunSent Solar and Roofing is your trusted expert for roofing repairs, replacements, and solar installations. Here’s what you need to know...
More Posts
A black and white drawing of a maple leaf on a white background.
Share by: