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Everything you need to know about 100w Solar panel

Doubts about 100w solar panel answered

This post was Last updated on : 07/20/2020

100w Solar panel FAQ Answered – Power, Price & Battery

Following are the top Questions Frequently Asked in google.in about 100w solar panels. Most of them are about power production, price and battery etc.

Many queries are similar, in what they are attempting to ask. So i will group such questions together and answer it.

What does 100w solar panel mean?

100w solar panel in perfect condition can produce 100w power in 1 hour.

If a 100w solar panel get 6 hours of good sun light it can produce 600 watt energy. We will be using this assumption for most of the following calculations.

Can a 100w solar panel run a tv?

Old CRT tvs with small screen have 100W power rating. New led, lcd televisions with 32 inch screen only consume around 60w. LCD, LED tv’s with bigger screen consume more power. As an average we are assuming power rating of our tv as 100w.

100w solar panel with 50Ah lead acid battery – can it run a tv?

Lead acid batteries can be discharged only upto 50% (Depth of discharge) (Some can be discharged more. But we are trying to avoid any issues by over discharging).

12 volt * 50Ah = 600 Watt hour. 50% of 600 is 300 watt hour.

we have 300 watt hours, so 100 watt tv we can use for 300/100 = 3

So we can use a tv with power rating of 100w for 3 hours. But after losses in dc to battery and then dc to ac, we can expect maximum 2 to 2.5 hour here.

100w solar panel with 50Ah Li Ion battery – can it run a tv?

Lithium ion battery pack can be discharged only upto 80% (Depth of discharge)

12 volt * 50Ah = 600 Watt hour. 80% of 600 is 480 watt hour.

We have 300 watt hours, so 100 watt tv we can use for 480/100 = 4.8

So we can use a tv with power rating of 100w for 4.8 hours.

But after losses in dc to battery and then dc to ac, we can expect maximum 3 to 4 hour here.

Can a 100w solar panel charge a 100ah battery?

It is good to charge a Battery with a current around 10% of its Amp rating. If it is low, it will take a very long time to get fully charged. If it is too high it will damage the battery. If we use a 100Ah battery, 10% of 100 is 10. So an input current of around 10 will will recharge it in around 10 hours.

So a 50Ah(or 40Ah battery because sunlight is only available for 8 hours maximum) battery will be the best option.

100w 12 volt polycrystalline panel can produce around 5 Amp at good sunlight. So it will take a lot of time to charge 100 Amp battery.

Rough calculations for a really sunny day – perfect conditions.

100w 12 volt solar panel with 5 Amp current & 8 hour sunlight – fully charge 45Ah battery in 8 hours.

100w 12 volt solar panel with 5 Amp current & 8 hour sunlight – fully charge 100Ah battery in 16 hours.

100w 12 volt solar panel with 5 Amp current & 8 hour sunlight – fully charge 150Ah battery in 24 hours.

100w 12 volt solar panel with 5 Amp current & 8 hour sunlight – fully charge 200Ah battery in 32 hours.

It is not recommended to use battery above 100w panel.

But you can use 100Ah battery if you already have one lying around. It is good for any future upgrading also. Only problem is that it will take a lot more time to get fully charged. And you should keep an eye on battery for over discharge problems.


Will a 100w solar panel run a fridge?

Domestic refrigerators will consume around 100 to 250 Watt. Since it is on all(most of) the time, refrigerator will need a lot of energy to work throughout the day.

According to Power available from the battery from the above calculation. Fridge(200W) can run on a 100w solar panel with battery for

  • Lead acid battery – for around – 1.5 hours
  • Lithium ion battery – for around – 2 hours.

How fast can 100w solar panel charge a battery?

It depends on type and size of battery used. But assuming we are using a 50Ah battery . It will get fully charged in a sunny day(6 to 8 hours of sunlight).

How much does 100w solar panel weight?

Weight is around 7 to 8 Kilogram for panels with frame. If it is frameless or flexible type weight will be 5 to 6 Kilogram.

How many 100w solar panels do i need?

This one is also an open ended question. So it depends on power requirement. It can be easily calculated using an online power consumption calculator.

If you have plans for fully going solar & want to do it yourself, I would recommend to start with 600w solar panels if you have a 3BHK house fully equipped with appliances. And 300w solar panel for 2bhk home.

How many Amps from 100w solar panel?

It can produce average around 5 Amps. Different brand of solar panel will give different results. It depends on quality of solar cells also.

How much is 100w solar panel?

Polycrystalline panel with 100w costs – from 3000 Rupees to 6000 Rupees

Monocrystalline panel with 100w costs – 3500 Rupees to 6500 Rupees

How to install 100w solar panel?

A space of around 7 square feet is needed to install single 100w panel. It can be installed on a stand or secured on the roof itself. It can be positioned at ’30 to 45′ degree south (In india since we are in northern hemisphere).

How big is 100w solar panel?

100w panel size – is around 1 meter long .6 meter wide.

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As we mentioned in the beginning, 100w panel can provide 100w in 1 hour of sunlight. Therefore 600w power in 6 hour of sun(600 watt hour). If we store it in a battery there are some losses.

We can get around 300 Watt hour storage from lead acid battery and around 400 watt hour from li ion battery.

We can power lights, fan etc with using this for all nighttime. If we are using power hungry equipments battery will discharge fast.

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Polycrystalline panel with 100w costs – from 3000 Rupees to 6000 Rupees. Monocrystalline panel with 100w costs – 3500 Rupees to 6500 Rupees.

What is the reason for this much price difference. Main reason is quality. Different brands use solar cells of different quality. There is also many chinese products circulating.

Solar panels come with a long term warranty. But cheap chinese panels will become useless in 5 or 6 years. Even if they work, efficiency will be very low. So only buy panels from trusted brands only.

Is 100w solar panel enough?

This is also an open ended question. But i would try to answer it anyway. 100w solar panel with a 50Ah battery is enough to run lights, 1 fan and recharge laptop and phone.

It is better to not run other Electrical equipments with high power demand with this system. You can do it, but battery will be discharged very fast.