What can I power with 100W solar power

Explore how to determine how much power a 100W solar panel will generate, what size battery and charge controller you need to store the power, and some ideas of what you can power with it and for how long.

We also show you how to do the calculations for yourself to figure out what you could do with off grid solar. Note that at minute 7, we included a deration for the inverter losses.

Since we are talking about what size battery is needed to put power in, not taking power out, we don't need to do that step. The battery can be 5% smaller than we calculated.

Qty 1 Evening = 220 Watt Hours

Qty 1 x 200 Watts x .20 Hours = 40 Watt Hours – Coffee Maker

  • Qty 1 x 20 Watts x Hours = 60 Watt Hours – Radio
  • Qty 1 x 10 x 3 Hours = 30 Watt Hours – Light
  • Qty 1 x 45 Watts x 2 Hours = 90 Watt Hours – Laptop

Solar Panels for Beginners: 60 cell vs 72 cell solar panels

We discuss the difference between solar panels that have 60 cells, or squares, and 72 cells. The 60 cell solar panels were originally designed for grid tie solar systems, but thanks to MPPT solar charge controllers are now also used in off-grid solar systems.

The 72 cell solar panels are also known as 24V panels, as they were designed to charge a 24V battery bank. With new codes and technology, they are now also being used in large grid tie solar systems.

12V Norminal Panel Normal panel for a 12 volt battery bank

  • 36 cells
  • 18 Vmp
  • 22 Voc

24V  Nominal Panel  Nominal panel for a 24 Volt Battery Bank

  • 72 cells
  • 36Vmp
  • 44Voc
  • 4 each 12 Volt battery banks in series = 48 Volt Battery Bank or
  • 2 each 24 Volt battery banks in series – 48 Volt Battery Bank
  • 2 each 36 Volt battery banks in series = 72 Volt Bank

1. Grit tied Solar (grid tied inverter) DC → AC no batteries required

2. Solar Charge controller with battery bank systems

12 V Solar Panel → 12V PWM Charge Controller → 12 V Battery Bank

18 Vmp, 8A Into Charge controller → 14 V, 8 A Into Battery Bank

3. 20 V Solar Panel → MPPT Charge Controller → 12V Battery Bank, 32Vmp, 9A Into Charge Controller → 14V, 20A Into Battery Bank

Monocrystalline vs. Polycrystalline Solar Panels - What’s the Difference?

See options of mono and poly solar panels at altE’s website: https://www.altestore.com/store/Solar... .

We often get asked by customers what’s the difference between monocrystalline and polycrystalline solar panels. Here’s a surprising comparison of the differences (hint: not as significant as you might think).

Top 7 Mistakes Newbies Make Going Solar - Avoid These For Effective Power Harvesting From The Sun

In this video, we'll discuss how to avoid these 7 deadly sins of solar. Whether that is a 10W starter kit system or a full blown whole house grid tied system, these all pretty much apply across the board. Make sure you don't fall into these or you will waste a bunch of money.

Looking for your first solar panel system?

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People make these 7 mistakes over and over again when they decide to buy their first solar panel system.

Solar Charge Controller | What is it and How it works in a Solar Power System

Shop solar charge controllers at altE: https://www.altestore.com/store/Charg...

Find out the basics of a solar charge controller, what it does, how it works, and how to select the correct size for an off grid solar power system.

  1. A charge controller is an important component in a battery based solar system and are not used in straight grid tie systems.
  2. The primary role is to manage charging the battery bank, prevent it from overcharging and many control the rate of the current and voltage at which it charges.

We'll cover related topics such as Bulk Charging, Absorption, Equalization, Float, Low Voltage Disconnect, PWM and MPPT types of charge controllers.

Shop solar charge controllers at altE: http://www.altestore.com/store/Charge...

Learn more about solar charge controllers here: http://www.altestore.com/store/info/s..

Comparing MPPT vs PWM charge controllers with a 24V panel and 12V battery 

A common situation with DIY solar systems is that someone gets a 20V or 24V solar panel, and then needs to use it to charge a 12V battery bank.

We demonstrate why an MPPT solar charge controller is needed to convert the voltage down and increase the current to maximize the power out of the solar panel.

While a PWM solar charge controller could be used, you will lose at least half of the potential power, so MPPT is a much better solution.

6 Steps to Design a DIY Off Grid Solar Power System

We go over the 6 steps needed to design a DIY off-grid solar system, and help point you to additional resources to help you successfully create your own off-grid solar system. This is best watched on a PC so you can see all of the links.

  • #1 Figure out how much power you need
  • #2 Calculate the amount of batteries you need 
  • #3 Calculate the number of solar panels needed for your location and time of year
  • #4 Select a solar charge controller
  • #5 Select an Inverter
  • #6 Balance of System (BoS)

Solar Panels & Batteries: Solar Power Components - Part 1 - 6

Solar Panels: https://www.altestore.com/store/Solar...

Batteries: https://www.altestore.com/store/Deep-...

This workshop will introduce you to the basic components of a solar electric system: Solar Modules and Batteries.