Overheated Batteries

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Overheated Batteries

Postby Lyndal » Mon Mar 27, 2017 12:56 pm

Does any one know why batteries would overheat? I've kind of not got much clue about this solar stuff. I had the guy come and look at it, but that hasn't helped much, he's noted that there is a problem with the communication link between the SP Pro and the ABB solar inverter was found to be not working . The company that installed the system has gone into administration, does this mean the warranty is not valid?

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Re: Overheated Batteries

Postby Gordon-Loomberah » Mon Mar 27, 2017 2:04 pm

Welcome to the Energy Matters Forums Lyndal :)

Generally Lead-acid batteries will overheat if charged or discharged at too high a rate. Are they all overheating, or just one?
You'd need to supply more details about the batteries and your system for a more detailed answer- type and model of batteries, how many, what capacity, how old, size of PV system etc.
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Re: Overheated Batteries

Postby davidg » Mon Mar 27, 2017 7:47 pm

Lyndal wrote:The company that installed the system has gone into administration, does this mean the warranty is not valid?

Where are you?

Warranty is difficult it depends on the specs of the battery/cells. Batteries compared to cells generally have shorter cycle life, but there other factors that affect battery/cell life. If the inveter was incorrectly programmed then thats an issue and so on it goes.
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Re: Overheated Batteries

Postby Lyndal » Tue Mar 28, 2017 11:43 am

System is 15 months old, I have the report from the guy who had a look, and the data from prior to and after the event that caused the batteries to overheat, but these are too large to upload here. I'll chase up other details as I can, I'm working away at the moment, and have limited access to information

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Re: Overheated Batteries

Postby davidg » Tue Mar 28, 2017 11:50 am

I note this has still not been answered ,sorry but, >>>>>> Where are you? <<<<<<<

The type and brand of the batteries/cells has not been posted, that would be very handy indeed.

The full tech specs of them as well, that includes any links to where the data might be online.

The programming details, historic logs, etc.
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Re: Overheated Batteries

Postby davidg » Wed Mar 29, 2017 5:35 pm

Here's a clip from the BAE spec info

BAECapture.JPG


As you can see there is no "5 PVV 420" cell, what does it say on the side of the cells?

I'm just trying clarify what the cells are for certain. The other thing is the best AH rating to use is generally the C10 rating, this tends to be closer to real world general use.
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Re: Overheated Batteries

Postby Helipos » Thu Mar 30, 2017 1:12 pm

Lyndal wrote:Does any one know why batteries would overheat?


Batteries get hot when discharged or charged hard. Or they will get hot when over charged and held there for a reasonable period of time (hours).


Lyndal wrote:The company that installed the system has gone into administration, does this mean the warranty is not valid?


Daveg has probably already PMed you this but I suspect Selectronics would cover the warranty rather than the installation company.
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Re: Overheated Batteries

Postby davidg » Thu Mar 30, 2017 4:52 pm

Helipos wrote:
Lyndal wrote:Does any one know why batteries would overheat?

Bunch of reasons but I'll reserve any possible answers without more detailed info first.

Helipos wrote:Daveg has probably already PMed you this but I suspect Selectronics would cover the warranty rather than the installation company.


No, Selectronic would not warrant the batteries/cells, they didn't supply them, they don't use BAE at all for a start.

The biggest issue is, was the SP-Pro programmed correctly to suit the cells in the first place, I suspect it wasn't. If that is the case any warranty even from BAE is unlikely to be valid. Overcharging, over current, undercharging, etc are all reasons to invalidate a warranty. It's very important that anyone that installs a system ensure the voltages, currents, etc are programmed for the cells/batteries correctly.

This also includes trying to ensure that they are fully charged periodically even if that means using a generator to do it. Poor or incorrect voltage control, charge current management or temperature control, means shorter life and/or premature failure typically.
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Re: Overheated Batteries

Postby Helipos » Fri Mar 31, 2017 11:24 pm

Sorry in the delirium of influenza I somehow missed the part were there were fried batteries.. not a fried SP Pro.

I probably should have been sleeping more, or sweating in bed as the case was.
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