[quote=“taree, post:9, topic:20965”]
now my panells arrived...1200 watt with 6 panells of 200 watts each...they are mono with 24 v
my first question is which cable should i use between solar and inverter?
u say 35mm in ur post but i cant understand technical words so much.
in simple words i should use wire which we normally use between ups and battery?
can u plz upload pics of that cable?
solar installation is a very tricky business.. if you are trying to do it yourself.. DONT, unless you are highly knowledgeable and skilled in electricity.. even one of our skilled men got a 380 Volt DC shock once, and he was barely saved. it is very risky.. lots of sparks and patakhaas can occur if you are not careful and you can burn your equipment , all of it easily in 2-3 secs.
the cable meant for solar connections is not the standard cable that you see in local shops.. its a specialized cable meant for UPS and solar installation only.. since you have 1200W now and probably would add more panels in future nearing 2000w, you would be very wise to spend a lot now on wiring.. wiring is the most critical component of the whole solar system, which can totally make it shine or fail it bad.
my own house wiring and connections cost me 35k, and that was only one floor from roof to top floor,.. if it was ground floor it would have cost me 20k more..there are almost 100s of things needed to be bought for installation..
now i have a system capable of supporting upto 80 amps of current, which is around 4000W roughly.. which can run a 2 ton ac along with fridge and freezer and whole house.. i am on the safe side now.. so wiring will not be a problem for me.. if i use cheap wiring now, wire will last me max 2-3 years and will have re-do all the wiring either it burns out or is insufficient for my needs.
the Actual Wire.
as for the choice of wires.. the wires for DC are very very limited.. you can either order a roll of wire from pakistan cable (locally high rated company) which is 90 meter of a single color and is sold in a roll only priced almost 40k direct from company. rateil price is much higher. and practically we need 2 color wires, red and black, so you have to buy 2 rolls and all the rest of the wire will be wasted..we have a personal contract with a company which gives us half roll wires of 2 colors, so that is safer, and less costly due to less wastage.. if you are willing to spend more, then best quality cable is the imported cable wich is true flexible, fire proof, burn proof and truly capable of high loads..this wire is available in cut pieces so you only buy as much as u need..this is actually a lot cheaper and much higher quality, cz even though its price per foot is high, much less wastage and being able to buy only as much as you need will ensure that instead of buying 2 rolls of pakistan cable for 90k, you can get as much as u need for around 25-30k, maybe a lot less if your batteries are nearby..
you can always buy more panels, or new batteries but you canot do wiring every day..
also its not just a matter of connecting clamps and wires.. the true clean quality installation is all copper connectors for short free super tight connections which can be re-assembled with ease any time you want.. not with the traditional battery terminals and screws. if there is one short loose end, it will burn your controller or battery and also damage panels.
we do all installations ourselves, not leave it to workers.. we do it all by our own hand to ensure each and every thing is secure fit and no issues..we dont do tape wiring or joint connectors..we only work with a team of proper electricians who know their AC from DC and welders who design the panels frame so that they donot blow away in wind or fall prey to shadows... and even then it takes almost a full day to do simple installations..thats why we dont get calls back from people for complaints..
once again, i would advise you not to do it yourself.. bear the cost of quality installation one time and be tension free for a long long time.. get proper installations done from someone who knows their stuff..it is a very costly investment, donot jeopardise it with saving a few thousand now..once a good installation is done, all you need is just attach panels and you are good to go. barely takes 10-15 min to ad 4 panels to existing system from then on;.