UPS Battery is SH5-12 12V 5Ah, can I replace by 12v xxxAh (maximum that I can find ?)

[grkt]

UPS Battery is SH5-12 12V 5Ah, can I replace by 12v xxxAh (maximum that I can find ?)

 

hello,

 

I need to change my UPS battery which is SH5-12V 5Ah

http://www.bb-battery.com/global/index.php?fn=product/category/ListStyle&path=80&btid=1

 

Can you confirm that I can replace it by a 12V 7Ah battery or more, as this one ?

https://www.lazada.co.th/products/battery-12v-7ah-vrla-agm-lead-acid-cs12-7-i123862098-s129603829.html

 

What is the maximum Ah that I can use ? And does it mean that the battery will last longer ?

Or is it plain stupid and I should only by the exact model as the original ? (but I didn't find it yet)

 

Thank you for your help.

 

 

 

 

 

 

[lopburi3]

Yes you can and you probably can not obtain that old 5Ah version anymore in any case - they tend to get a bit larger capacity every few years.  But this is a cheaper price and 7.8Ah and working fine for me as replaced a 6Ah battery 3 months ago.

https://www.lazada.co.th/products/matrix-battery-ups-12v78ah-i3680115-s4501600.html

[Crossy]

If it physically fits, yes you should be good to go.

 

You will get slightly longer run-time along with (of course) longer to re-charge after a run.

 

[sfokevin]

Curious if you have a UPS that has a small 12v battery could you wire up (I know it would not fit into the enclosure) a large deep cycle 12v battery instead of the battery that came with it?

 

Something like this:

https://www.lazada.co.th/products/battery-12v-50ah-solar-gel-deep-cycle-cg12-50-i10702121-s13392756.html?spm=a2o4m.searchlist.list.14.2a696b17rbR4xb&search=1

[Crossy]

31 minutes ago, sfokevin said:

Curious if you have a UPS that has a small 12v battery could you wire up (I know it would not fit into the enclosure) a large deep cycle 12v battery instead of the battery that came with it?

Yes, but the built-in charger may not be able to re-charge the external battery in a reasonable time (or ever).

 

We have a 2kVA UPS that's hooked to two 100Ah truck batteries, it needs an external charger if the batteries have been discharged significantly. Normally no issue as the genset starts in 30 seconds or so, but in the event it doesn't we have lights, computers (and TV) for long enough for me to work out why.

 

[sometimewoodworker]

1 hour ago, lopburi3 said:

Yes you can and you probably can not obtain that old 5Ah version anymore in any case - they tend to get a bit larger capacity every few years.  But this is a cheaper price and 7.8Ah and working fine for me as replaced a 6Ah battery 3 months ago.

https://www.lazada.co.th/products/matrix-battery-ups-12v78ah-i3680115-s4501600.html

Which UPS are you using? I assume that it's sill going strong.

[lopburi3]

46 minutes ago, sometimewoodworker said:

Which UPS are you using? I assume that it's sill going strong.

An older model of below - SPEC - cheap but works good (much better than expensive units I have used in the past) and was quick/easy battery change and immediately fine again.

https://www.lazada.co.th/products/spec-ups-spec-800-plus-800va-320w-i8505923-s10680308.html

[sometimewoodworker]

11 hours ago, lopburi3 said:

An older model of below - SPEC - cheap but works good (much better than expensive units I have used in the past) and was quick/easy battery change and immediately fine again.

https://www.lazada.co.th/products/spec-ups-spec-800-plus-800va-320w-i8505923-s10680308.html

Thanks for the information, I decided that at the price, for my needs, and the fact that I can easily wire in a car or motorcycle battery to something like that to extend the run time and it's cheap enough that I'm not worried about how my modifications look, that it's worth buying one for at least one of my computers, and maybe with an external battery will run the farm. So it's on the way for bit under 1,700 Baht 

 

I will be very interested to find out if the fibre goes out or keeps running once it's converter box is on a UPS.

[lopburi3]

Here in Bangkok internet (True Fiber) stays up during infrequent short outages.

[Crossy]

46 minutes ago, lopburi3 said:

Here in Bangkok internet (True Fiber) stays up during infrequent short outages.

We're a bit further out, but TOT fibre has remained up even during some pretty long outages (several hours). I'm assuming it will go down eventually but as yet no problem.

 

The only time the fibre went off with the power was when a truck removed a pole carrying both.

 

[Led Lolly Yellow Lolly]

You need to be careful running UPS with higher capacity batteries. Cheaper UPSs will run hot, eventually too hot and at best cut out, or maybe worse. More expensive brands will be OK, an APC will run all day if it has power and sufficient cooling. I modified a basic APC model for a longer run time on one of our LAN racks. I cut it up, stuffed fans into it and a bigger battery and it now runs long enough for me to get dressed and go crank the generator. It's a bit of a kludge but it works. It's advisable to fuse the cables though. This arrangement sucks just under 20 Amps. . .

 

My other switches and racks are modified to run on 50 volts DC, stepped up DC to DC, much longer run times, UPS devices are horribly inefficient. What I describe above was a 'no choice' situation, had to use UPS on this rack. . .