- Thread starter bob saunders
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Inversor batteries
We just started using Li batteries last year for our new off grid high school, they have been great so far. I had to do a fair amount of tweeting to get everything to be happy and play nice together, but the system is more complex than any of our other off grids. I will be switching our house over to Lith once our trojans die (8yrs so far). For me one of the biggest benefits is the no maintenance- water/ corroded cables.
You should consider Lithium if you want a longer, maintenance free life and the ability to monitor them from anywhere. They are neat, efficient and easy to monitor. I am showing some photos of my app that I can use to monitor the batteries from anywhere. Those batteries are 4 kW 48 V each. They are about $2000 for each one and can add more units depending on how much capacity you need. You can drain them down to 10% versus lead acid batteries you should not drain them down below 50%.
The lithium 24V one I'm looking at is 50K.
Trojans are still around 10K ish each. I'm really leaning towards the lithium because of Maintenace free.
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I jumped over to FB Marketplace and found the Trojan Reds have dropped. Not only that, but everyone and their uncle is selling them.
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Anywhere from 4500 each (with your old battery) up to around 8k. Sure seems odd there are so many vendors now.
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Anywhere from 4500 each (with your old battery) up to around 8k. Sure seems odd there are so many vendors now.
ours were $3500 U.S each, but they are 48v 225ah and came with a full 10 year non prorated warranty- they are saying they could last 20+ years. We will see, after the first year of use the batteries say they only have 40 cycles on them (they are supposed to last somewhere between 3000-8000 cycles). To compare price it is hard because they are not apples to apples. I have a bank of 40 trojans that cost about the same as 2 of the Lith and only performs about the same with maybe half the life expectancy. Time will tell.
How big is the counterfeit business in these?I jumped over to FB Marketplace and found the Trojan Reds have dropped. Not only that, but everyone and their uncle is selling them.
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Anywhere from 4500 each (with your old battery) up to around 8k. Sure seems odd there are so many vendors now.
How about AGM batteries, these are an upgrade from normal lead-acid, maintenance free and cheaper than lithium’s.
If all of those are counterfeit I would really be surprised.
On the other hand, I'm trying to find more info on these batteries but not having any luck. At all. With any brand.
I can’t find anything either on those. Our “ made in usa” Agm batteries I looked up once only had a link to a battery shop in SD. I thought Trace was american but also only shows up in the DR. Their old invertors are pretty bulletproof though. Apparently a few big battery factories produce for many brands who only put their name on it.If all of those are counterfeit I would really be surprised.
On the other hand, I'm trying to find more info on these batteries but not having any luck. At all. With any brand.
The "regular" are manufactured in Puerto Rico, but I'm not having any luck with these other than UK or Thai manufacturers
image did not show up they are 85kg just under 200# each. Looks like this. Charge last MUCH longer then 4 tiny little batteries haha!Is yours similar to this:
Even if it the charge doesn't last as long as 4 Trojans, it would be nice to have something maintenance free for a change.
So yes they are 300amh but what does that mean in simple terms? Each battery gives out about 7.5kwh and how they market them now cause that is the same thing that is written right on your power bill. Take a look at your power meter in the morning, at night, and the next day... You will know how many (Kwh) you go through on a day / night. Or take your monthly usage/30 that is what you use in a 24hr period.
That makes a lot of sense. So how many volts is each one?
My average usage is about 5-6 per day, so a couple of these would keep me going for quite a while!
I kept resisting buying new batteries because I hardly ever have blackouts. Maybe once a month or so the electricity goes off for 5 or 10 minutes, so I couldn't convince myself to do it.
I tried reconditioning the 4 Trace batteries and it didn't seem to help at all. I'd turn off the electricity and they would conk out in a few minutes. Gonzo.
So, I finally bit the bullet and went with 2 of the 400Ah gel batteries. 25K for 2 and 1k for delivery from Santo Domingo.
I gave the kid my 4 old Trace 235s for a tip.
I discovered how old I am when I tried to pick one up and move it. I couldn't. They have to be over 100 lbs each. I ended up putting them on a rubber mat under my inverter on the floor.
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I tried reconditioning the 4 Trace batteries and it didn't seem to help at all. I'd turn off the electricity and they would conk out in a few minutes. Gonzo.
So, I finally bit the bullet and went with 2 of the 400Ah gel batteries. 25K for 2 and 1k for delivery from Santo Domingo.
I gave the kid my 4 old Trace 235s for a tip.
I discovered how old I am when I tried to pick one up and move it. I couldn't. They have to be over 100 lbs each. I ended up putting them on a rubber mat under my inverter on the floor.
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I am also in the battery market.
My commercial grade batteries that cost who knows what started dying one by one just after the two year warranty was up. Then the batteries were no longer available in the country to replace, and thank God I didn’t based on their performance.
I am working with an expat in Moca. He keeps asking me why I don’t change my system to sell my energy from the solar panels to EdNorte.
Means I need to change the entire system again and I am no longer willing to do that.
He is working with his engineer and will give me an estimate of replacing with gel batteries or buying lithium.
I know the lithium batteries last longer, but will I last as long? It’s a gamble.
Will let you know the quotes he gave me when I receive them.
My commercial grade batteries that cost who knows what started dying one by one just after the two year warranty was up. Then the batteries were no longer available in the country to replace, and thank God I didn’t based on their performance.
I am working with an expat in Moca. He keeps asking me why I don’t change my system to sell my energy from the solar panels to EdNorte.
Means I need to change the entire system again and I am no longer willing to do that.
He is working with his engineer and will give me an estimate of replacing with gel batteries or buying lithium.
I know the lithium batteries last longer, but will I last as long? It’s a gamble.
Will let you know the quotes he gave me when I receive them.