Fork me on GitHub

Battery Size Calculator
Calculate the size battery you need for a certain runtime

Formula: Battery Ah - Watts of the load multiplied by the required runtime multiplied by the DoD devided by the desired battery voltage multiplied by the efficiency of the inverter.

If you have a 100 watts 42" TV and a 12V 7ah battery lying around and a UPS for example, then you can work out the runtime using the calculator below.

Reset Calculator

Time Conversion Table

Hours Minutes Total Minutes
1 0 60
1 30 90
2 0 120
2 30 150
3 0 180
3 30 210
4 0 240
4 30 270
5 0 300
5 30 330
6 0 360
6 30 390

Additional information about the calculator

The calculator will show you both Lithium and Lead Acid battery options.

The calculator automatically sets the optimal depth of discharge (DoD) depending on the load and battery type. To prolong the life of a battery, a lead-acid battery should not frequently be discharged below 70%, and Lithium-ion battery not below 20%. Note that 0% is a flat battery and 100% is a full battery.

How do I calculate the charging time of a battery?

If we ignore the losses during charging, divide the battery capacity by the charging current to obtain the battery's charging time in hours.

For example to charge a 100Ah Lead Acid battery using a 5Ah Optimate 6 charger will take roughly ±16 hours to recharge

Some articles you might also be interested in...

How to block ads on your network using Pi-Hole and a Raspberry Pi
How to block ads on your network using Pi-Hole and a Raspberry Pi

With Pi-Hole you can block in-app advertisements. Network-level blocking allows you to block ads in non-traditional places such as mobile apps and smart TVs, regardless of your hardware or OS and since advertisements are blocked before they are downloaded, network performance is improved and will feel faster. Pi-hole is a black hole for Internet advertisements.

Read The Article
How to buy bitcoin on Binance?
How to buy bitcoin on Binance?

Binance exploded onto the scene in the mania of 2017 and has since gone on to become the top crypto exchange in the world. The company is very dedicated to making the exchange the premier source for trading, there are many trading events all the time, and coin approval doesn’t come without solid review. This allows for an exchange where every coin on it is considered to some degree legitimate. Binance actually understands the mindset and ethos of the crypto-community and the mantra of decentralization, it’s no wonder that they have the highest trading volume in the world while being a relatively new exchange.

Read The Article
How to access BBC iPlayer outside of the UK
How to access BBC iPlayer outside of the UK

You might have found that Hulu is limited to US viewers and the BBC iPlayer is likewise limited to UK IP addresses, however using a very easy to set up proxy server you can access BBC Iplayer, Hulu and many others from any country on all of your internet capable devices such as your Laptop, PC, Mobile Device, Kindle Fire TV, Apple TV, Google Chromecast etc. In this guide you get the ultimate viewing experience when streaming/downloading any type of regional or geo-blocked content online.

Read The Article