So 65+30=95 Watts.

This setup will power that your laptop and fan from 8am to 10pm every blessed, bright or sunny day, only on one condition, if you don't put your panel on the roof but a place where you can position it 3 times a day towards the direction of the sun.
In this case, you have to charge from 8 am to 4pm, that’s about 8 hours of charge time or insolation period.
If you have a 150 watt solar panel and 100 AH battery bank, you should be able to charge and use at the same time, so when the sun stops charging the battery by 4pm you should have a full battery and to know the power stored in that full 12 volts,100AH battery, use a simple multiplication formula. The ampere (or amps) is the amount of electricity used. Voltage measures the force or pressure of the electricity. The number of watts is equal to amps multiplied by volts

VOLTS x AMPS = WATTS

So 12 volts x 100 AH = 1200 Watt- hour
So at full charge your battery should have 1200 watts-hour of power to use when the sun goes down and the battery not charging anymore.

So how long can your laptop and fan which is 95 Watts use this 1200 Watts-hour? Simple, just divide
1200 ÷ 95 = 12.6 hours.

Hummmmm, you are kidding me. But do you know the truth; a good inverter will not suck all that 1200 Watt-hour before the low battery alarm kicks off. So let's do a rough estimate, divide 12 hours by 2 to get about 6 hours.
Also for your battery to last, you should always discharge it to 50%

so, if we have a full battery by 4pm plus additional 6 hours, that takes us to 10pm. That is about 14 hours of non-stop power. Wow amazing isn't it?

EXPLANATION OF THE COMPONENTS (where to buy)

1) BATTERY

For most of us who might be wondering what kind of battery solar system uses, or those who will be asking, can I use a heavy duty car battery such as a trailer battery, car battery, UPS battery or any other battery?
The answer is Yes, with a BIG BUT. These batteries mentioned above can generate electricity but they are not suitable and not efficient and so will not stand the tast of time.

I once used two 12volts 7AH UPS batteries to generate electricity that could power my laptop, ceiling fan and charge phones, but it wasn’t reliable as you can see in this video below

I started my experiment using two 12volts UPS, but I had to upgrade my batteries to 200 AH to avoid damage to my inverter.

So, what am trying to say is that, the recommended solar system battery is the Deep cycle battery, it is able to provide power gradually for a very long period of time, but a car battery is designed to provide instantaneous power, which is over a short period of time.

The battery stores the power which the solar panel produces during the day so that you can make use of it at night, batteries comes in different volts and amps, these volts and amps are common, 2volts, 6 volts and 12 volts. and 100AH, 150AH and 200AH are examples of comon battery amps you can easily get

2) INVERTER

Inverters comes with specific voltages like12, 24 and 48volt, some inverters are designed for 110 volts. The most common ones are 12 and 24 volts inverters. So when you hear I have a 12 volts system, that individual is trying to say that his inverter is designed to accept 12volts, so that inverter must be connected to a 12 volts battery,

So if you are using 10 batteries for your solar system setup, all your batteries must be connected in parallel, i.e. parallel connection increases the amps hour of the batteries but the voltage remains the same

If for instance I have 10 batteries which are 12 volts, connecting in parallel will give me 12volts.
When connecting your batteries in Series you are doubling the voltage while maintaining the same capacity rating (amp hours).
If an individual says I have a 24 volts system, it means her inverter accepts 24 volts, so two 12 volts batteries must be connected in series because series connection will increase the volts of batteries connected.
The power of an inverter is measured in watt or kva, a 1000 watt inverter is equivalent to 1 kva

3) CHARGE CONTROLLER

A charge controller, just as the name implies is a device that controls the charging of a battery.


80A 12V 24V Solar Charge Controller It is the middleman between the solar panel and the battery, it stop the battery from charging when it is full and initiates charging when the battery is not in full mode, there are two major types, the PWM (pause with modulation) and MPPT (maximum power point tracking).
PWM Solar Charge Controller 10A 20A 30A Regulator 12V 24V Auto Big Display with Dual USB 5V for Home PV System Lighting 2017 NEW


MPPT is expensive but better than the PWN, it is 92% efficient while PWM is 80% efficient. the choice of your Charge Controller can determine how efficient your system is.
Tracer 3210A EPsloar 30A MPPT Solar Charge Controller 12V 24V LCD Diaplay EPEVER Regulators

4) SOLAR CABLE

This is not just any kind of wire, it is designed specifically for solar installation and it does not have the negative and positive cables wrapped together. They are separate which makes it unique, the recommended quage is usually 10 or 12 AWG (meaning 10 or 12 guage), this wire usually comes in black and red color.

1meter Red+1meter Black Silicon Wire 12AWG 14AWG 16AWG 22AWG 24AWG Heatproof Soft Silicone Silica Gel Wire Cable

5) SOLAR PANEL

This is the most durable component of solar setup, good solar panels can last 25 years, we have more than two types but the most common are monocrystalline and polycrystalline. The material difference between polycrystalline and monocrystalline rests in the composition of the silicon substrate used to make solar cells, and in turn solar panels.
As the name implies, monocrystalline means “a single crystal,” while polycrystalline means “many crystals. The mono is better and more expensive than the poly

They are also rated in volts and watts, the commons ones are 12 (18) and 24 (36) volts, the common watts are 80, 100, 130, 150, 250,and 300 watts.
100 W Watt 100W PV Solar Panel Kit 12V RV Boat Off Grid Solar Battery China Zonnepaneel Painel Solar Fotovoltaico Factory Price

This device traps energy from the sun, sends it to the charge controller, the function of the charge controller is to reduce the rated voltage to battery voltage i.e. the charge controller receives 18 volts from the solar panel and reduces it to 12 volts before it is sent into the battery in a 12 volts system same as in a 24 volts system, the charge controller receives 36 volts but reduces it to 24 volts. 

Solar system calculations are never 100% accurate because energy is lost as it moves from one position to another, this is just an idea you can hold on to, meaning you don’t need to have $5,000 before you can have a solar system, start small and upgrade later.

With the example above, anytime I want to power more gadgets like

Solar Panel 100W 12V Photovoltaic Waterproof Placa Fotovoltaica Solar Battery Charger Panneau Solaire 100w For Homes SFPM100W

2 TV 65 Watts      = 130 watt

2 Laptop 65 watts = 130 watt

3 Fan 30 watts        = 90 watt

1 Sup woofer           =25 watt

130+130+90+25 = 375 watts 

Remember, I may not use all the gadgets at the same time, this is what I need to do; I will have to add 2 more 150 watt solar panels, that is a total of 3.

An MPPT charge controller is the best for this because it charges the battery faster than the PWM charge controller, as long as my charge controller can handle 450 watts of power coming from the solar panel

3 x 150 watts = 450 watts, 

2 x 100 AH battery = 200 AH
3 x 100 AH battery = 300 AH

So

For 2 batteries, 12 volts x 200 AH = 2400 watts, 2400/375 watts = 6.4 hours. @ 50% 6.4/2= 3.2 hours

For 3 batteries, 12 volts x 300 AH = 3600 watts 3600/375 watts = 9.6 hours. @ 50% 9.6/2 = 4.8 hours

For questions or comments, see below. Share this as most people are asking this same queston.