Paul believe me I understand what you are thinking and wanting to do. The problem is you are fooling yourself. Sure you might reduce your electric bill by say $100/month. But it will cost you $1000/month doing so taking it off-grid with batteries. You are not saving money, you are throwing it away. That is what I and others are trying to make you understand. Battery cost alone will be significantly more than you are paying the electric company.
Run some numbers and you will see what I am talking about. You say you are using Rolls S460 which is a great battery. The way you are using it will last about 1 year, then needs replaced. Baby them with 20% DOD daily and you might get 5 to 7 years. OK a Rolls S460 is a 6 volt 350 AH battery. You are fully discharging them to 100% DOD every day. So the energy they produce is 6 volts x 350 AH = 2100 watt hours each day. Actually a little less each day with such deep discharges but let's ignore that for the model. In 1 year they will have delivered 365 x 2.1 Kwh = 766 Kwh/year and now time to replace them.
In the USA we can buy a Rolls S460 total delivered cost of $350 USD. In Jamaica much higher and you have to answer that question for your model. That means in just battery cost alone a Kwh cost $350/766 Kwh = $0.46/Kwh. Average USA price for a Kwh is $0.111/Kwh. So here you are looking a a 400% increase in electric prices for just battery cost alone. Now it is time to buy another battery at even higher prices.
So now stick in your price for a single S460 delivered to your home and set up and determine what the Kwh cost is. The formula is $JMD / 766 = $JMD/Kwh. I guarantee you it is a lot more than the electric company is charging you for the exact same product. Just off the top of my head I am guessing you will pay about 300% more for the battery than we do in the USA of about $1350 USD for a S460 battery or $136,350 JMD. So your numbers would look something like $1,350 USD / 766 = $1.76/Kwh or in Jamaican money $136,350 JMD/ 766 = $178/Kwh. So go get your real numbers and look at the true cost. I think it will be an eye opening experience in reality you are not going to like.
Run some numbers and you will see what I am talking about. You say you are using Rolls S460 which is a great battery. The way you are using it will last about 1 year, then needs replaced. Baby them with 20% DOD daily and you might get 5 to 7 years. OK a Rolls S460 is a 6 volt 350 AH battery. You are fully discharging them to 100% DOD every day. So the energy they produce is 6 volts x 350 AH = 2100 watt hours each day. Actually a little less each day with such deep discharges but let's ignore that for the model. In 1 year they will have delivered 365 x 2.1 Kwh = 766 Kwh/year and now time to replace them.
In the USA we can buy a Rolls S460 total delivered cost of $350 USD. In Jamaica much higher and you have to answer that question for your model. That means in just battery cost alone a Kwh cost $350/766 Kwh = $0.46/Kwh. Average USA price for a Kwh is $0.111/Kwh. So here you are looking a a 400% increase in electric prices for just battery cost alone. Now it is time to buy another battery at even higher prices.
So now stick in your price for a single S460 delivered to your home and set up and determine what the Kwh cost is. The formula is $JMD / 766 = $JMD/Kwh. I guarantee you it is a lot more than the electric company is charging you for the exact same product. Just off the top of my head I am guessing you will pay about 300% more for the battery than we do in the USA of about $1350 USD for a S460 battery or $136,350 JMD. So your numbers would look something like $1,350 USD / 766 = $1.76/Kwh or in Jamaican money $136,350 JMD/ 766 = $178/Kwh. So go get your real numbers and look at the true cost. I think it will be an eye opening experience in reality you are not going to like.
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