{"id":93,"date":"2025-07-12T08:45:42","date_gmt":"2025-07-12T08:45:42","guid":{"rendered":"https:\/\/goldstarbattery.ug\/blog\/?p=93"},"modified":"2025-07-12T08:45:46","modified_gmt":"2025-07-12T08:45:46","slug":"solar-battery-capacity-explained-ah-vs-kwh","status":"publish","type":"post","link":"https:\/\/goldstarbattery.ug\/blog\/2025\/07\/12\/solar-battery-capacity-explained-ah-vs-kwh\/","title":{"rendered":"Solar Battery Capacity Explained: Ah vs. kWh"},"content":{"rendered":"\n

When buying a solar battery, one of the most confusing things for customers is understanding the battery\u2019s capacity. You\u2019ll often see two main units mentioned: Ah (Ampere-hour)<\/strong> and kWh (Kilowatt-hour)<\/strong>. What do these mean? Which one should you care about? And how do they help you choose the right battery for your needs?<\/p>\n\n\n\n

Let\u2019s break it down in simple terms \u2014 brought to you by Gold Star Solar Battery<\/strong>, a trusted solar battery manufacturer in Uganda<\/strong>.<\/a><\/p>\n\n\n\n

1. What is Ah (Ampere-hour)?<\/strong><\/h3>\n\n\n\n

Ampere-hour, or Ah, is a measure of electrical charge<\/strong> \u2014 it tells you how much current a battery can provide over a period of time.<\/p>\n\n\n\n

For example, a 100Ah battery can deliver 100 amps for one hour, 50 amps for two hours, or 10 amps for 10 hours. The higher the Ah rating, the longer your battery can supply power (assuming the voltage is the same).<\/p>\n\n\n\n

Ah is often used in 12V, 24V, or 48V<\/strong> batteries \u2013 common in home solar setups.<\/p>\n\n\n\n

2. What is kWh (Kilowatt-hour)?<\/strong><\/h3>\n\n\n\n

Kilowatt-hour, or kWh, is a measure of energy<\/strong> \u2014 it tells you how much work the battery can do.<\/p>\n\n\n\n

To convert Ah into kWh, you can use this formula:<\/p>\n\n\n\n

kWh = (Ah \u00d7 Voltage) \u00f7 1000<\/strong><\/p>\n\n\n\n

So, if you have a 150Ah, 12V battery:
(150 \u00d7 12) \u00f7 1000 = 1.8 kWh<\/strong><\/p>\n\n\n\n

This means the battery can store 1.8 kilowatt-hours of energy \u2014 enough to power a 100W fan for 18 hours, or a 1000W iron for 1.8 hours.<\/p>\n\n\n\n

3. Why Both Units Matter<\/strong><\/h3>\n\n\n\n

While Ah tells you how long<\/strong> a battery can supply electricity, kWh tells you how much total energy<\/strong> it can store. When planning your solar system, both values are important:<\/p>\n\n\n\n