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LiFePO4 - The future for off-grid battery banks?
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Is there a good or great portable solar expandable Grid tie with battery charging system?
Tommy L sends...Comment
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You cant have a portable gridtie system. Well not legally anyway in any country I know of. It has to all be installed to that areas regulations . Those ebay plug into wall socket grid tie inveters are to the best of my knowledge not legal anywhere and for good reasons.. example say you have a circuit that is rated for 20a and its already carrying 16a and you plug an inverter into it putting out 6a you are now opperating that circuit above its rating, now mabe overheating and a free fire.Comment
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Originally posted by john p View PostYou cant have a portable gridtie system. Well not legally anyway in any country I know of. It has to all be installed to that areas regulations . Those ebay plug into wall socket grid tie inveters are to the best of my knowledge not legal anywhere and for good reasons.. example say you have a circuit that is rated for 20a and its already carrying 16a and you plug an inverter into it putting out 6a you are now opperating that circuit above its rating, now mabe overheating and a free fire.
I thought from all my reading to date that the Grid Tie inverters energy would be used first.
The 16amps 1900watts Grid consumption would be reduced to 1200watts and the Grid Tie would
supplement the rest 6amps or 700watts.
Am I not understanding something correctly about the Grid Tie and how it works?
Tommy L sends....Comment
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Originally posted by TommyL View PostAm I not understanding something correctly about the Grid Tie and how it works?
Tommy L sends....
If your systems is generating more power then your home uses, the excess goes out to your neighbors. If you are consuming more power than the system is generating, then the grid makes up for the shortage.MSEE, PEComment
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Good day all.....
I'm not very good at this forum stuff, but I guess it's correct to stay on topic.
I will use Headway 38120HP (Red Cells) for an off grid system.
I've seen people using this in type of system while on Grid safely with a
Generator style pony panel. So you could collect sun all day and store into batteries,
run the house clocks and low consumption items while no one is home. Continue to
use during the evening until more consumption is required, then switch over to Grid power.
This way you get the best of both worlds, a back up without fuel and using solar to supplement
Any thoughts?
Tommy L sends....Comment
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Originally posted by TommyL View PostGood day all.....
I'm not very good at this forum stuff, but I guess it's correct to stay on topic.
I will use Headway 38120HP (Red Cells) for an off grid system.
I've seen people using this in type of system while on Grid safely with a
Generator style pony panel. So you could collect sun all day and store into batteries,
run the house clocks and low consumption items while no one is home. Continue to
use during the evening until more consumption is required, then switch over to Grid power.
This way you get the best of both worlds, a back up without fuel and using solar to supplement
Any thoughts?
Tommy L sends....
Better solution is plain ole grid tied system, where all that power during the day goes right out on the grid building up your credits, so when you come home you get to burn your credits and net 0 usage. If you want emergency power, install a generator using either LPG, NG, or diesel fuel. It is a lot less expensive, no limitations on power, and much better on the environment. Its a win-win no brainer.MSEE, PEComment
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The grid tie system uses the grid as an immense battery in the case Sunking mentioned[SIGPIC][/SIGPIC]Comment
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Originally posted by TommyL View PostAny thoughts?
Tommy L sends....
You can get about 500 cycles out of your run of the mill batteries, probably 2000 out of your LiFePO4 batteries. For a typical house you're talking at least 12kwhr per day, so you would need 12,000 / (8ah * 3.2V) = 470 batteries, for a cost of around $10,000, for even one day of storage. They would have to be replaced every 5 years. So that's an additional $166 a month you'd have to pay to cycle through your batteries.Comment
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This is all Awesome Information! This is awesome, but I'd like to do this on a small scale and expand. I've built my own house.
Yes, even pulled my own electrical permit. I will be having my final inspection this summer, so I will contact the Electrical Authority
and see if I require a different permit or if existing will cover it.
We have the new digital meter here. I'd like to find out more about that might be a benefit or not.Comment
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Home Energy Back up System
Hi Everyone,
I am new to solar and I am not that technical by any stretch. I have read some of your messages on this thread and it sounds like LiFePO4 has a higher initial cost but lower maintenance than lead acid batteries. I am currently in Nigeria: a country that has a lot of power outtages. I am looking for good home energy system to compliment our spastic grid here. I estimate a house load of 5kva. Please advise on the most cost effective brand of solar panels, inverter and battery pack to buy and their respective costs. Sorry moderator but I will like the names of companies and location so I can contact them for quotes to import. There are a few solar engineers I can employ to install for me. Deep cycle batteries and generators are very popular here and it has to to do with their relative cheapness. Thank you in advance.Comment
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Originally posted by Bigdo View PostI am new to solar and I am not that technical by any stretch. I have read some of your messages on this thread and it sounds like LiFePO4 has a higher initial cost but lower maintenance than lead acid batteries. I am currently in Nigeria: a country that has a lot of power outtages. I am looking for good home energy system to compliment our spastic grid here. I estimate a house load of 5kva. Please advise on the most cost effective brand of solar panels, inverter and battery pack to buy and their respective costs.
The absolute minimum price for the solar panels alone is about $1 a watt - so we are talking $24,000 for just the panels. And that's cheap chinese panels.
Is this within your price range?Comment
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Originally posted by john p View PostBILLVON..If I was using 3600kwh a month I would be seriously worried.
They kept growing and eventually got sick of maintaining the batteries all the time, so bought two 50kW propane generators. Now they just run one all the time, and keep the other as a backup. (And since they have a few military contracts now, they can afford the fuel and service.)Comment
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Sorry im not getting the connection? The guy was asking about a home install. I dont think his house in Nigeria is going to be in the same league as large industrial installation requirements are.??Comment
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