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Old 2nd June 2020, 19:31   #1501
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Default Re: Inverter Batteries

I recall Sanyo displaying their solar AC in Bangalore about 20-25 years back. BPL had a tie-up with them and the Japanese company had this unit displayed at their key showroom on Brigade Road. I was really fascinated by this tech (this was even before we had those rooftop solar heaters). The AC was prohibitively expensive (Price was in Yen). And, Bangalore hardly had any ACs those days due to its cool clime. But that tech is as old as they come and was even commercialized in Japan, those days
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I doubt such a system is available off the shelf
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Old 5th June 2020, 08:13   #1502
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Default Re: Inverter Batteries

Just checking, has anyone here vacated and refilled their inverter batteries with electrolyte as regular maintenance ?

My neighbors have pretty entry level batteries and their battery wala changes acid every year after dumping the old (he collects it and takes away), washes the innards and refills with his concoction.

Seems the battery has been running without any issue for last 5+ years.
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Old 5th June 2020, 15:20   #1503
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I recall Sanyo displaying their solar AC...
I think that was solar absorbtion technology. They seem to have vanished from the public eye. There was an Austrian company called SolarFrost that made great strides in solar cooling. [All these systems completely avoid electricity, compressors and the like. Use heat to create the cooling] Facinating stuff, I remember one Electrolux fridge that ran on kerosene.

Last edited by mvadg : 5th June 2020 at 15:26. Reason: Added SolarFrost URL
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Old 5th June 2020, 17:55   #1504
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Seems the battery has been running without any issue for last 5+ years.
I sing too mine once a week, and it has been running well for nearly five years so far.

Just kidding () of course. Making the point that five years would be a normal expectation anyway, so we can't say anything in particular made it last that long. The real truth is that I actually neglect mine, letting the level indicators go right down (although the water is still above the plates) before refilling less than twice a year.

I'd like to see the guy do that job, and assess his safety. Or, perhaps I wouldn't.

I wonder if he checks the specific gravity ever? This used to be a regular thing, decades ago, with car batteries, before they came maintenance-free.
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Old 5th June 2020, 18:25   #1505
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I sing too mine once a week, and it has been running well for nearly five years so far.
... what all we do to please a inanimate object to perform in hour of need.

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I'd like to see the guy do that job, and assess his safety. Or, perhaps I wouldn't.

I wonder if he checks the specific gravity ever? This used to be a regular thing, decades ago, with car batteries, before they came maintenance-free.
No sophisticated work here Thad-san. Just plain old disconnect from mains, unplug the leads, open the cell refill plugs, dump the electrolyte in a industrial plastic drum, flush the cells with distilled water and probably MgSo4 or epsom salt which is a premix solution, refill with fresh electrolyte.

What baffles me is that few years back we used to face (post Vardah cyclone) power cuts from 4-8 hours. And this family used to run the batteries with irritating beeps all the while without any issue. And only recently I came to know about this wizardry.

Was feeling left out and wanted to check if anyone here are familiar with this practice.
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Old 6th June 2020, 01:35   #1506
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No sophisticated work here Thad-san. Just plain old disconnect from mains, unplug the leads, open the cell refill plugs, dump the electrolyte in a industrial plastic drum, flush the cells with distilled water and probably MgSo4 or epsom salt which is a premix solution, refill with fresh electrolyte.
That is rather what I feared. Remember that said electrolyte is actually dilute sulphuric acid. And beware of paying to much attention to word dilute there. You will get holes where it splashes on your clothes, burning sensation where it splashes on your skin, and you do not want to get it in your eyes.

Added to that, the disposal problem... Just pass that on to the environment by pouring it in a drain? At the very least it should be neutralised first.

Did we mention, last time that this was discussed, that mixing sulphuric acid and water (always pour acid into the water, never water into acid) is exothermic. Small things please small minds, and this production of quite a lot of heat from two cold liquids never failed to entertain me
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Old 6th June 2020, 07:45   #1507
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That is rather what I feared. Remember that said electrolyte is actually dilute sulphuric acid.
I'd be more worried about the lead dissolved in the acid. Dilute sulphuric acid would react with the soil and become sulphate, not too bad, but lead would remain highly toxic in whatever form.
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Old 6th June 2020, 14:45   #1508
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I'd be more worried about the lead dissolved in the acid.
Good point! So... Apart from immediate risk to skin and eyes, there would be short term environmental problems from the acid, but long, possibly permanent, danger from the lead.

Worse than I thought!
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Old 3rd July 2020, 12:41   #1509
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Default Re: Inverter Batteries

My inverter battery slowly giving way after 6 yrs of service.
Its a 150aH Luminous brand and I must admit that I was lax for the first 2 yrs to regulartly top up.

I need to replace it and am confused with
Exide Invatubular (60 months) Rs 14200
Luminous 18075 (75 months) Rs 13100

Both prices on batterybhai

Please recommend between the two and also if there are better sources to buy other than batterybhai.
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Old 3rd July 2020, 13:10   #1510
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My inverter battery slowly giving way after 6 yrs of service. Its a 150aH Luminous brand and I must admit that I was lax for the first 2 yrs to regulartly top up. I need to replace it and am confused with
Exide Invatubular (60 months) Rs 14200 Luminous 18075 (75 months) Rs 13100 Both prices on batterybhai

Please recommend between the two and also if there are better sources to buy other than batterybhai.
Between these two I'd go in for the Exide. This is from personal experience. My Exide inverter batteries are now 7 years and 3 months old and going pretty strong considering their age.

There are other online etailers too including Amazon but try contacting your local dealer for a quote and basically play vendors against each other.
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Old 8th July 2020, 19:55   #1511
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My inverter battery is a 4 year old 150aH Exide invamore (a flop Exide model). Noticed from probably last 7-8 months that the inverterís charging light keeps blinking always; meaning that the battery probably is always in charging mode. I spoke about this with the Exide dealer and he says that the inverter itself is fine and itís the battery which has gone weak and this is why the charging is always on. I topped up the electrolyte last week and things were still fine. What happened next is the back up failed within seconds after a power cut. I checked and found that electrolyte level in all but one cell was very low! I topped the level again and charged the battery through the same inverter. The battery seems to be holding up little better and the electrolyte level also seems to be ok since last 3 days. Experts, What could be the problem?
So, finally changed the inverter battery and rectified the mistake that I made last time of going for short tubular battery. This time went for Exideís tall tubular battery and got a refund of 3K towards return of old battery. Net to net I paid Rs. 10.5K for Exide IMTT1500aH. All looks good now.

Thanks.
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