What could I charge with a 120w solar panel?

[rdlrn19]

Hi

I've a 120w solar panel (18 volts + 7 amps) and I would like to know what things could I charge with that panel?

I mean could I charge a tv, a laptop, a computer at the same time?

How much watts my solar will produce for example in 2 hours? 240 w?


Thanks in advance

[crestsolar zhang]

Hi

You can't charge the electric applications directly! that will not good for your applications !

You can charge a DC 12V battery ,but it's also not good to connect them directly ,you'd better connect a 12V controller between them .

Normally ,it will produce about 300wh to 500wh electricity in one sunny day for your 120W solar panel !

Zhang

[rdlrn19]

Hi

Yes in fact I use a solar charger, 12v deep cycle batterie and inverter. But I would like to know what could I charge? a TV? a laptop?

Thanks

[Mike90250]

With the energy stored in 1 day of sun, you could power a 200W TV for 2 or 3 hours.
A 90W laptop for 5-6 hours
A 60W light for 6 or 8 hours
A toaster for 15 minutes.

It's all in keeping with what you harvest (5 hours, 100W), and what your loads are. Larger loads for a short time, or small loads for a long time

[natel]

annual savings

I have a question related to this question. Am I somewhat correct that this electricity would have otherwise cost me roughly $50 a year with the following assumptions. If I pay 32 cents a kwh to my electric company. And, I use 500 wh a day from a 120w solar panel 300 days of the year. 300 days * 16 cents a day = $48 a year. Is that fairly accurate?

[Naptown]

In most areas like where I live in Maryland we get on average about 4.5KW/SM per day average daily insolation.
so annually if that panel were here it would produce approx 197 KWH per year with battery losses figure half so actual would be around a hundred KWH usable or $32.00 a year. Grid tie would be a bit better and more like your figure.

[noone]

Hi

I've a 120w solar panel (18 volts + 7 amps) and I would like to know what things could I charge with that panel?

I mean could I charge a tv, a laptop, a computer at the same time?

How much watts my solar will produce for example in 2 hours? 240 w?


Thanks in advance

Hi

It depends.

Firstly, you can probably power a few things directly but for the things you mention you will need a regulator and battery and run them from the battery.

If your regulator is a PWM type, then you can only count on around 168 watts for the two hours (84 Watt hours) and then unless you are using a LiFePo4 type battery, you will not be able to use it all without ruining your battery.


With a Mppt controller you will get more but they are more expensive and maybe not worth it for your panel.


If you had a two outlet 12 volt cigarette socket, you can charge your laptop and watch a tv at the same time....depending on sizes of course....my laptop only draws around 3 amps...a bit less and you can get 12 volt TVs that are small and use little power. Maybe even find a AA powered TV and charge your AAs from your batttery (unless you have another way of charging them).

You can power lots of things from the battery though. just about any 12 volt appliance for at least some time....even high draw things for short times.

Again, it all depends.....

[noone]

Oh, I just realised how old the thread is.

Oh well I guess it is still relevant for someone in that situation.