The Alternative Energy Thread - Generators, Solar, UPS, Wind

[dexter1377]

Sure, Brother i will make a list and display it here. Not a very expensive system.

Thank brother waiting

Sent from my SM-G925F using Tapatalk

[talhawaleed]

Your work is realy appriciate. I want that you upload pic of your system plz
Best reguards

Here are the pictures of my Controller, Apart, i have a fourth Controllers, i am going to upload its pic later.

[moizadil]

Hey OP, you seem knowledgeable on this topic, can you please reply to my thread?
https://www.pakwheels.com/forums/showthread.php?t=277479

[talhawaleed]

Hey OP, you seem knowledgeable on this topic, can you please reply to my thread?
Help regarding net metering in islamabd - 277479

Replied.

[FBB]

Replied.

Kindly share the pics of your solar plates installed. And also tell us are you using some generic brand or specific in solar plates.

Sent from my Z12 using Tapatalk

[moizadil]

I'm completely illetrate on electricy and solar etc[emoji14]I have no idea how you should go about doing things but I will be doing some research regarding this on pak wheels and otherwise..

I want to ask something. I have no idea how much solar potential is there on the roof of my house. My neighbor has an identical house to mine and he has installed 16 solar panels in the roof of his house, would you be able to give an estimate as to how much electricity would 16 solar panels generate? Because I could go for a similar rig.

[zafariqbalsami]

Here are the pictures of my Controller, Apart, i have a fourth Controllers, i am going to upload its pic later.

thank a lot
but bhai take pic of solar board mount also
how you rotat solar pannel mount
thanks

[Khurramchauhdary]

Good job. Highly appriciated

[snnahmed]

Why you add seperate charge controller for batteries. You can add more panels to axpert inverter and used it for battery charging too. Also add proper rated fuse between batteries and inverter.

[talhawaleed]

That is an option, like Axpert VM 2000 Plus has 1500Watt charge controller and connected to two batteries of 200AH in series, adding more solar panels then the prescribed rating of inverter can damage it. One can restrict the charging of batteries on Axpert whereas use an additional charge controller and assign it a responsibility of charging the batteries only. one can utilize the power produced via Axpert
VM300 plus in running the emergency load (UPS Line) at home without diverting the power to the batteries.

This option is feasible for those who have already bought an inverter and want to increase its capacity via
installing more panels.

Number of things, one can do here.

[pwuser149406581147]

Salam, Dear Talha I want install solar system for home, but I need your guidance. I want to purchase inverex 5kva mmpt inverter, plz tell me due to limit in budget how many minimum solar panels can I install with 5kva inverter 48v system.
Plz send me your contact nbr.
Regards,
Abbasi,
03133098925

[talhawaleed]

Well, there is a new inverter in Market which is Axpert VM II, its supposed to be manufactured by Voltronic Power but still I don’t see its details on her site but anyway is being sold by inverex in Pakistan.

After reading its specs online, I feel that this is one of the best solar mppt inverters out there. This has an
maximum VOC Voltage of 500Volts and allows you to connect 3000 watt solar panels all in series of 250 watt each which makes a total number 12 or connect 4000watt solar panels in two strings with 8 in each string.

Cost of one poly type solar panel varies between Rs. 8500 to Rs. 10,000/-. I would not advice you to buy a 5kW inverter in same model as both 3kW and 5kW models in Axpert VM II series has same 4kW solar charge controller. This is practically good enough for your entire home, excluding fridges and Air Conditioner.

I have recently bought two of those on behalf of my family members and cost of one is Rs.43000/- which I feel is very reasonable. So you can easily do math’s as how much the entire system is going to cost you. This specific inverter gets connected to 24 volts battery bank.

Further, I hope, you know that higher the VOC voltage offered by an inverter the better it is.

[zeus65]

@talhawaleed,
Talha bhai. Very nice write up. You are a huge help to non-field enthusiast and diy kinda guys.

Few questions I have, which I haven't picked up from ur write up. So need ur xplanation.
Regarding using split ac on the grid tied system u have installed;
it uses solar energy in the day time to run the ac only and then uses wapda line at the night ???
And u have connected 5 panels of 250w each to run 1.5 ton conventional split ac???
And how much time it runs ac in day time???
And can we use this same set up to run a refrigerator in winters instead of a/c ???

[zeus65]

@talhawaleed

"I DON’T HAVE FUNDS TO INVEST SO MUCH INTO SOLAR SYSTEMS:

Maybe you have funds to install a UPS System at Home, do yourself a favor, next time once you retire your old UPS and are looking forward to buy an imported UPS (Inverex inverter 2400VA, 24 Volts battery system) then spend Rs.3000 extra to buy a solar version in same brand. By doing so, you are all set if ever you want to attach solar panels on it. If at later stages, if your pocket allows, then buy 2*150 watt mono type solar panel for around Rs. 6500/- each market price and add it on your controller. You can start with minimum string and expand till 10*150 Watt on same controller in any given frame of time. Guess what, it will power your output line during day and will leave you with a very good backup even to spend most of your night. This inverter comes with a PWM charge controller so it’s important that you buy a 2* 150Watt solar panels and wire then series to make it a Vmp=36Volts system which In return will give you a Vmp Voltage between of 30-32 Volts as Vmp Voltage fluctuates with change in temperature of Solar Panels."

talha bhai, a lil confusion here, with these solar hybrid inverters, we can run the 220v fans and savers using solar energy in daytime and same can be run with wapda line at night and when in loadshedding at night, battery backup will the system. am i right with this understanding?????

[talhawaleed]

In-Order to understand things, you need to understand your energy requirements, for that, I would
advice you to consult your Electricity Bills and number of units your consumed per month.

If you have consumed 600 units of electricity per month then those units represent Kilowatt Hr. of electricity consumed by you.

For Example, if your one energy saver is off 25 watts and you keep it on for 12 hours daily for next 30 days then that represents these many units of electricity per month.

Kilo Watt hr of electricity consumed by Energy saver per month: 25Watt * 12 hrs * 30days /1000 = 9 units.

Similarly, if you run your 2000Watt Air Conditioner for 6 hours daily for next 30 days then that will translate into these many units on electricity bill

Kilo Watt Hr. of Electricity consumed by Air Conditioner on above Condition: 2000 * 6 * 30 /1000 =360 units.

In Air Conditioner, a trick is, that compressor only runs for half the time, so actually you are running your AC for 12 hours in above case.

Now lets come to, that you want to reverse that electricity to national grid and get rid of those bills so in above example your total units becomes 369.

In Order to calculate that, we will assumed few parameters, simplify the data, so that it maybe as close to the reality as possible. We will consider 250 watt of solar panels with 6 hours of daily sunlight with continuous 600Watt/meter-square of solar radiations and 10 % losses.

Here are the formulas.

Daily Harvest in KWh = (Total Panels * Area of Each Panel) * (Assumed Solar Radiation Average) * (Total Assumed time interval of the day considered) * (Efficiency of the solar panels) * (losses as per assumed) * (Conversion into kw)

Month Harvest in kWh= Daily harvest * 30 days

Yearly harvest= Daily harvest * 365 days

Calculations:

Daily
Harvest in kWh= (10 * 1.48) * (600) * (6) * (17/100) * (90/100) *(1/1000)= 8.151 kWh/day

Monthly Harvest in kWh= 32.42 *30 = 244 kWh/month

So with Above calculations, you can see, with 10 solar panels, you would be able to
reverse 244units of electricity back to the national grid. In above calculations, you can increase number of solar panels to null to electricity bills after considering your consumer bill.

[talhawaleed]

you are perfectly on the spot, in night, they will be like ordinary UPS but during day, they will power all your appliances from sunlight.

[umans]

Hi Talha,
Thanks for enlighten us with very useful information. I'm thinking to implement a small system. I've 700 W pure sine wave UPS, New 200AH tubular plate battery. Now I want to buy 2 panels of 300 watt each, one charge controller and one small grid tied inverter. I'll hook panels with inverter, that will feed electricity to any socket to offset some units in bill. In absence of light, panels output will be directed to charge controllers to charge the batteries so UPS will do its job simultaneously. Need your recommendations on

• Which panels to buy, brand , price availability?
• Where to buy small grid tied inverter with limiter. It’s not available locally, Ali Express is the option but I want to avoid hassle of customs.
• Recommend me some good MPPT charge controller. Brand, Price, Availability. Primary requirement is its perimeter(cutoff voltage, Battery low voltage etc ) should be configurable. As per my findings tracer A series or CN series both configurable using PC but I’m unable to find them in any online in Pakistan.

Another possibility is to hook UPS with controller load terminals and configure controller to disconnect load (UPS) when battery falls below 13.7. Intention is to run UPS without discharging battery directly on solar. When battery falls below 3.7 connect UPS with grid. We can add some delay in switching to avoid frequent connection. I have common ground in UPS wiring. What if I disconnect UPS from grid, UPS will be providing 220V using battery and ground will be common between UPS and Grid, is it OK or It’ll start feeding energy to grid ?
Need to know about your valuable input on that. Thanks in advance.
@talhawaleed

[moizadil]

I never knew such a ups existed, I knew about ups that charge during the day but didn't know they'd support ups appliances on solar too. If I were to get such a ups then what would be the installation procedure? What I mean is what are the components needed for such a system, does everything come with the ups? And how hard is it to install such a system? Any estimates of cost would be really helpful too.

Currently I run a 2kva ups with two 190 amps batteries.

[moizadil]

@talhawaheed

Sorry if this is a stupid question but since I have no knowledge about Solar I have to ask this. Can there be a solar solution where you have an inverter, say a 5kw inverter and a number of solar panels on the roof, so during the day your house get as much electricity as it can from Solar and the rest comes from WAPDA, if there is excess solar then it can be wasted. The main intention here is to not get batteries, and to utilize the extreme amount of roof space that I have. The ideal solution would be a net metering system but Pakistan so the above mentioned system is the best possible thing. Is a system like the one described above possible?

Another possible solution that is possible is to have a 5kw inverter and a battery bank and run everything except appliances like fridge, ac on the batteries but the wiring in my house is such that you cant do this without messing with everything and making connections for Fridge, acs separate throughout the house.

[danishmmh]

They are called on-grid inverter and they can do lad sharing based on priority. But they cost twice as a normal inverter. I have not yet brought myself up to the level to get one. So i am getting an off-grid hybrid for myself