Solar powered Laptop, Computer Speakers, DSL-Router, Wi-Fi-Router, Network-Switch and External TV Tuner

Here is some serious project and also worth doing it. So no more issues with power-cuts usually happens a lot in India during every summer. Simply clean renewable power source all day and night. Whenever I am at home all these gadgets are turned on most of the time and all of them I connected to my 600VA UPS. Usually laptop I connect to the UPS non-battery backup surge protection port. So that even if there is a power failure, my laptop won't consume UPS battery power. So here is the power consumption per device:

Computer Speakers (4.1 Surround Speakers) 15 Watts
(being a music lover I better love speakers which are big and can produce excellent sound quality)

Laptop 35-90 Watts
(on a full charge it consumes just 35Watts but when its battery is getting charge it should consume 90Watts)

Wi-Fi Router+Wired Switch+DSL Router 10 - 15 Watts

External TV Tuner 6 Watts
(whether I turn on or off, anyway its power-adapter is on, so its the "phantom power" which is sucking power)

Total Usage: 66 - 126 Watts
UPS Load when there is power: 66 - 126 Watts
UPS Load when there is no power: 36 Watts (since laptop works on its battery)

Unfortunately I have not found any ready-made commercial solution which can specifically address this energy requirement. Either the solution is too expensive and far bigger than what is required or simply the small scale solutions which are not flexible enough if I want to upgrade or scale-up in future. So I thought let me design a clean energy solution myself.

Overall Setup before connected to Non-Renewable Power Source.

Step 1 Overall setup after connected to Clean Renewable Power Source

Comments

[jhunmar100]

where can i get the 12V DC to 220V AC Converter Inverter can i use that for house?? pls reply.......:(

[TA2DC]

I VANT 12 VDC 230 VAC 600 OR 1000 INVERTER CIRCIUT.MANY TX. YOU 73's...Op.Mehmet TA2DC

[dasimpson1981]

so much wastage here it is untrue

[dasimpson1981]

see if the switch needs more then 500ma if not run it off usb you might find the routers will run of 12volt fine my router is 9 volt but runs of 12volt no problem

better ideas get a dslmodem/wirelessrouter
all needed then is dslmodem/wirelessrouter and the laptop running off a car power block insted of the household ones

[r.srohan]

i think you had just wasted money  and time.
1)ups act as a inverter. you wasted money on buying new inverter.
2)only you needed was extra battery and controller.

now listen very carefully as per daigram consern you needed controller between solar panels and battery so that it will protect from over charching.and frying your battery.

What will happen when their is rainy season.solar will not produce as much as you needed electricity.so it needed to charge from some source it can be charged from wind energy or from mains source.

I think if your inverter don't charge from mains then make modification such that it will charge from mains or any other source.(external charging from mains and keep watch on battery by connecting amp meter if you dont have). if your inverter dont charge better go with ups it will automatically shift between mains and solar energy only you have to change relay switch 1st preference to solar panel.(In ups 1st preference is given to main so whenever main line is there it will not use battery power.you see whenever line goes then only it use battery power.)


As you told you are not using now ups. but i sugest you go to local repair shop and tell him to interchange connection between main line and battery line ( relay switch connection )
NOTE :-  IF DONE IN-CORRECTLY CAUSE UPS TO GO IN CONTINUIOUS LOOP. THAT IS IT WILL SWITCH TO MAINS THEN BATTERY POWER IN SECOUNDS AGAIN AND AGAIN.

[Sanat]

 What will happen if 350w inverter is used?

[kiran_cyberpro]

Hey, actually you can use any Inverter there, also you can use multiple inverters too, so you can connect 2x350w or even 1x1000w and 1x350w so on. But please ensure you have enough battery power to sustain. The inverter you choose too, also should sustain your initial load surges, say you have a 350w inverter then you can connect equipment same max to 280-300w rating, anything beyond that can make invoice to react odd during power-on surges. Also add a external fan to the inverters, its better you keep it as cool as possible. The batteries emit dangerous gases, which might cause any potential explosion, or even fire hazard, so try to keep the environment as safe as possible also by every means as cold and away from sun as possible.

[kiran_cyberpro]

Hi Derin, already I had removed the dependency from the UPS, hence its only batteries and the same recharged from Panels and being consumed through DC to AC inverter. I have an APC UPS, but if I increase the battery capacity, the UPS lacks the detection mechanism of the available battery capacity, hence UPS cannot be used and so I am using the inverter. Kiran

[doodadica]

Hi, Nice instructable, thanks for posting it. I've been preparing a project like this myself and was planning to do a blog about it on my new site (doodadica.com). I'm curious why the UPS is necessary. Why can't you plug your powerstrip directly into the inverter? And why plug the laptop in separately from the other items on the power strip? Is this just to distribute the load between the two (Main battery and UPS) batteries? Also, shouldn't you have a charge controller between the panels and the battery? Thanks!

[kiran_cyberpro]

Hi True as you said, actually I have discarded the use of UPS. Instead I am using now only that UPS battery. Also I hooked up a small charge controller. Cheers, Kiran

[Derin]

The UPS has a built in charger for AC and an inverter.

[Derin]

You could also do it a different way,splicing to the original UPS battery connections.

[stuuf]

Since all your equipment is DC-powered, wouldn't it be simpler and more efficient to skip the inverter stage and use DC-DC converters to generate the right voltages for all the devices?

[kiran_cyberpro]

I had already thought about it. But you see there are many devices each consumes different wattage and different DC voltage. Since converting DC would not be a flexible solution. Say laptop adapter needs 19V, then Switch is some 5v, then wifi Router is some 9v and so on. Having an inverter is a best option. Also inverter has battery charge indication. So if the voltage in the battery drops it beeps up. Say suppose two days there is no sun and its raining, then all I need to do is to connected back the UPS to the main power-supply instead of the Inverter. So its a very practical and flexible solution. Cheers, Kiran

[ironsmiter]

at some point in the circuitry of the UPS... there is a line voltage to 12v conversion already. And if your model is anything like mine, it'll be easy to trace. One SHOULD be able to take the 12V line going into the charge control circuit, T off with a pair of diodes, and hook the solar panel into the diodes(screwblock/plug connector on the ups body?). That should allow you to bypass the primary battery, and inverter, making for a much more efficient use of the solar cells. When you need to charge off line voltage, unhook the solar panels(just to be safe, but you shouldn't actually need to if the diodes are working correctly) and plug it in.