Do not worry! The formula is easy.
You need to multiply the capacity of your battery by the voltage. In this case, you must determine a 50% DOD rate, as the inverter and other processes drain off some energy stored in batteries.
If you ask this question about your own commercial properties, you must seek advice before investing in solar systems. It is also dependent on a variety of variables like the battery’s voltage, weather conditions, power consumption, the list goes on. Experts can help you through the process. Switching to hydropower can be another way to lower your monthly utility bill.
Solar Battery for 15000 watts or 15kw Solar System
If you are looking for a residential property solar system and not moving completely off-grid, I do not think you need an off-grid 15-kilowatt system. You can set up a 7000 watts solar system which will be more than enough for a house. However, you may need 15kw for commercial premises.
How Many Batteries Do You Need for a 15KW Solar System?
In short, you need a minimum of five 500ah 12-volt batteries for a 15kw solar system. However, many factors influence the performance of the battery.
I do suggest you buy branded and high-quality products. You can look online; you will find 5000 watts, 10kw, 7000 Watts, or 15kw batteries.
Do I Need 15000 Watt Batteries in My House?
I do not think that you need 15000-watt batteries to power your home. However, if you want to purchase a 15-kW battery for a large space and want to do so, then choose three 1000AH 12-volt batteries that are suitable for residential usage.
Additionally, you must look at the following elements before investing in solar batteries.
Factors that Determine the Number and Performance of Solar Batteries
There are a lot of factors to consider, but I will provide you with the main factors that will help you to make the right decision. If you are a homeowner, I do not think you will prefer a heavy upfront investment. You can start with a 7000-watt solar system as a backup during a power outage. After that, if you are comfortable and want to increase the battery capacity, you can install solar panels and batteries to take another step toward an off-grid solar system. Besides that, if you do not install solar panels, then 15kw or 7kw solar systems will be charged using the on-grid coal electricity; you may not save on your electricity bills in such a way.
Factor 1: Power Consumption
It is important to think about the energy consumption of your home. Generally, you may not use a refrigerator or air conditioner during power outages, so you should not include the consumption of these appliances in your energy calculation.
In this way, you must determine the power consumption and battery package required to back up the primary grid power source. I think 7000 watts is enough for residential buildings and 10kw-15kw for commercial buildings. For commercial properties, you may consider hydropower because it is also a renewable energy source. That is why I suggest you seek advice from an expert before making any decisions.
Factor 2: Calculate the ROI
Please calculate the ROI to determine the amount you can save. Are you considering switching entirely to an off-grid power source? Speak to an expert and tell him about your requirements. Here, I am trying to help you in the best way, but it is a one-way communication, so I cannot provide suggestions based on your requirements. You can comment below or contact me on my email id firstname.lastname@example.org for more personalized information. Before making any decision, estimate the ROI and select the most suitable choice for your location.
Factor 3: Source of Charging the Batteries
Some people utilize an off-grid system to power their homes. The primary purpose of using solar power is to save energy and utility bills, but you cannot save the amount if you do not install solar panels.
If you want to invest money into an energy-efficient solar system, you must invest in solar panels to go completely off-grid.
I have written many aspects regarding the topic; you can read my other posts to learn more about solar products and their usage.