Anyone have experience with these

I have a Victron based system for the house, but additionally had a local UPS (older Delta Amplon, 1kVA) at the computer/networking rack.

it got taken out by lightening on Tuesday night, insurance is paying me out, figured out my load is also to much for 1KvA, so wanting to go 3kVA, looking at options in the price range of insurance payout, and really like the Delta's but they seem to be probably above my budget.

The Mercer looks good.

https://tech.co.za/product/mecer-winner-pro-3000va-2u-on-line-rackmount-ups/

then a dumb question, as these run on 12V Lead Acid batteries, can I attached a normal lead acid in parallel with say one of the batteries as it seem they run in series, with a dedicate charger ?

I know it's Boer maak a plan, I happen to have 6 x 12V / 9AH batteries, meaning I can take the current 6x unit and keep the voltage at 72, but widen the Ah, by adding a extra battery in Parallel to each in the string, realise if it goes onto battery, when power/grid come back it will take longer to charge back up, but not really a issue.

G

Edited March 21Mar 21 by georgelza

I have a 1kva equivalent and going strong years later. They are all very similar, voltronics rebrands from the looks of it.

Note the dimensions of the 3kva, it's quite deep, won't fit in a wall mounted network rack.

Dimensions 630 x 438 x 88mm

3 hours ago, georgelza said:

Anyone have experience with these

I have a Victron based system for the house, but additionally had a local UPS (older Delta Amplon, 1kVA) at the computer/networking rack.

it got taken out by lightening on Tuesday night, insurance is paying me out, figured out my load is also to much for 1KvA, so wanting to go 3kVA, looking at options in the price range of insurance payout, and really like the Delta's but they seem to be probably above my budget.

The Mercer looks good.

https://tech.co.za/product/mecer-winner-pro-3000va-2u-on-line-rackmount-ups/

then a dumb question, as these run on 12V Lead Acid batteries, can I attached a normal lead acid in parallel with say one of the batteries as it seem they run in series, with a dedicate charger ?

I know it's Boer maak a plan, I happen to have 6 x 12V / 9AH batteries, meaning I can take the current 6x unit and keep the voltage at 72, but widen the Ah, by adding a extra battery in Parallel to each in the string, realise if it goes onto battery, when power/grid come back it will take longer to charge back up, but not really a issue.

G

Without knowing the dimensions of the wall mounted unit the link at R8000 seems high for 3kVA.

The older Axperts/Mecer and who know how many clones running at 24V might do the trick with 3 of your 12V batteries in parallel for 24V.

Just a thought splashing the insurance proceeds😀

Edited March 21Mar 21 by Scorp007

8 hours ago, Scorp007 said:

Without knowing the dimensions of the wall mounted unit the link at R8000 seems high for 3kVA.

The reason for that price is these type of ups has zero transfer time (Online Double-Conversion UPS) with battery voltage of 240v dc mainly used for server data.and medical standby applications.

8 hours ago, Scorp007 said:

The older Axperts/Mecer and who know how many clones running at 24V might do the trick with 3 of your 12V batteries in parallel for 24V

These are line-interactive ups with 20ms transfer time generally not suitable for sensitive electronics found in IT and medical equipment.

guys,

these are not wall mount, they are rack mount,

they are not rebranded voltronic, house hold 240V,

they are 6 x 12V at 72V, these are local computer rack units.

@TaliaB spot on,

They are always on, no transfer time,, computers always feed from them and the recharge cycle feeds the batteries, they are similar to your house alarm, it always runs of the battery, and the battery is kept charged on the other side

G

11 hours ago, abd7 said:

I have a 1kva equivalent and going strong years later. They are all very similar, voltronics rebrands from the looks of it.

Note the dimensions of the 3kva, it's quite deep, won't fit in a wall mounted network rack.

my rack sits on top of a cabinet, was thinking of turning this side ways. Have space that way, sound wise ? it's about 4m behind me ?

other idea is to go for the 2kVA unit, I had a 1kVA, it did not last long, so this will take me from two to four batteries, I actually have another 4, so was thinking of wiring them in parallel. extending the load carrying time.

G

11 hours ago, abd7 said:

I have a 1kva equivalent and going strong years later. They are all very similar, voltronics rebrands from the looks of it.

Note the dimensions of the 3kva, it's quite deep, won't fit in a wall mounted network rack.

the depth... i assume that physical, excluding cables out the back.

your 1kva, how many plugs at the back does it have.

it looks like this unit have 4 x C13 and one SA 3 point plug.

G

33 minutes ago, georgelza said:

guys,

these are not wall mount, they are rack mount,

they are not rebranded voltronic, house hold 240V,

they are 6 x 12V at 72V, these are local computer rack units.

@TaliaB spot on,

They are always on, no transfer time,, computers always feed from them and the recharge cycle feeds the batteries, they are similar to your house alarm, it always runs of the battery, and the battery is kept charged on the other side

G

'Winner Pro' ups, branded RCT, Mecer etc, are manufactured by Voltronics. That's not a bad thing, it's good to know the manufacturers are on that level

https://voltronicpower.com/en-US/Product/Detail/Winner-Pro-1KVA-10KVA

Edited March 22Mar 22 by abd7

interesting.

getting different views of the Mercer, one side says stay away, other, happiness

G

35 minutes ago, georgelza said:

the depth... i assume that physical, excluding cables out the back.

your 1kva, how many plugs at the back does it have.

it looks like this unit have 4 x C13 and one SA 3 point plug.

G

On the 1kva (few years old model) there's no SA plug. I think it's got 4 or 6x IEC

4 minutes ago, georgelza said:

interesting.

getting different views of the Mercer, one side says stay away, other, happiness

If you willing to pay probably more than double, you can look into APC or Eaton brands , who will sell additional battery expander units as well (Rackmount Extended Battery).

Alternatively your 'make a plan' with your own batteries will probably work as well, but have no experience on that.

Edited March 22Mar 22 by abd7

6 minutes ago, abd7 said:

On the 1kva (few years old model) there's no SA plug. I think it's got 4 or 6x IEC

the 3 pin sa plug is on the 3kva unit,

from online specs it seems to have 4 x IEC (10amp) and 1 SA 3pin/16amp plug.

G

1 minute ago, abd7 said:

If you willing to pay probably more than double, you can look into APC or Eaton brands , who will sell additional battery expander units as well (Rackmount Extended Battery)

only have $$ as per insurance pay out,

I would love a Delta, but can't see that fit into that budget.

G

Edited May 17May 17 by georgelza

1 minute ago, georgelza said:

only have $$ as per insurance pay out,

R11500, I would love a Delta, but can't see that fit into that budget.

G

Give this a read https://powerforum.co.za/topic/2639-hacking-ups-to-last-longer-adding-large-12v-battery/

2 hours ago, TaliaB said:

The reason for that price is these type of ups has zero transfer time (Online Double-Conversion UPS) with battery voltage of 240v dc mainly used for server data.and medical standby applications.

These are line-interactive ups with 20ms transfer time generally not suitable for sensitive electronics found in IT and medical equipment.

Thanks Mate. I was aware of the requirement for medical equipment. Did not know the IT equipment needs a zero transfer time offered by the double conversion. Insidently my 1st pure sine inverter was a double inversion and worked so well until the wife decided to help with a manual switch back when grid came back and it was history. The good take away for us was to leave switching for me 😀

doing some more thinking, i have about 750W load from the computer rack. If everything is on.

That means with a 0.8 power factor, I’m good for about 1hour on a 1kva, please someone, tell me i’m not smoking my socks. concern point would be to what charge level of the batteries would this be, we know lead acid’s/gel don’t like to dip below 50%.

so I’d think I might be ok with a 2kva ups.

G

26 minutes ago, georgelza said:

only have $$ as per insurance pay out,

R11500, I would love a Delta, but can't see that fit into that budget.

G

I use these for hospital theatre backup. They are available in 1kva 2kva and 3kva as well. Employs sodium ion batteries.

PSS Distributors - UPS & Inverter Power Specialist

10KVA Rack/Tower UPS Sodium Series - PSS Distributors

True Online Double Conversion UPS Size: 10 000VA/10 000W Input/output Voltage: 230V/230V Design: Tower Power Factor: 1 Battery: Internal Software: Intelligent

1 hour ago, georgelza said:

my rack sits on top of a cabinet, was thinking of turning this side ways. Have space that way, sound wise ? it's about 4m behind me ?

other idea is to go for the 2kVA unit, I had a 1kVA, it did not last long, so this will take me from two to four batteries, I actually have another 4, so was thinking of wiring them in parallel. extending the load carrying time.

G

Just keep in mind batteries of different makes and state of health used in parallel makes calculations a hit or miss at times. Do spend so time to do load tests on each battery to work out back up time initially. Load acid batteries can also suddenly start under performing over time and needs some input as part of maintaining the system. Older batteries in parallel with new ones tend to over work the new ones and can lead to disappointment.

@TaliaB scared to ask what the 3kva units cost.

G

10 minutes ago, Scorp007 said:

Just keep in mind batteries of different makes and state of health used in parallel makes calculations a hit or miss at times. Do spend so time to do load tests on each battery to work out back up time initially. Load acid batteries can also suddenly start under performing over time and needs some input as part of maintaining the system. Older batteries in parallel with new ones tend to over work the new ones and can lead to disappointment.

I'm lucky that I have a good Victron system up the line with allot more power, so this UPS would be good if it can handle the load for 20-30min / max.

I'd rather have a 2kva or 3kva, meaning i'm running allot lower % of the capability of the UPS.

G

27 minutes ago, georgelza said:

I'm lucky that I have a good Victron system up the line with allot more power, so this UPS would be good if it can handle the load for 20-30min / max.

I'd rather have a 2kva or 3kva, meaning i'm running allot lower % of the capability of the UPS.

G

I also always degrade the maximum loads for the inverters and even my Deye 5kW has never been subjected to more than 4kW even for short periods.

As you know your loads even a 3kW should serve you well.

Have a look at the Hikvision DS-UPS3000 Available at just over R4000 for a 3kVA unit.

might have a Vertiv GX3 offered.

Hmm at that price I can get 2 units => Hikvision DS-UPS3000

G

Edited May 17May 17 by georgelza

33 minutes ago, Scorp007 said:

I also always degrade the maximum loads for the inverters and even my Deye 5kW has never been subjected to more than 4kW even for short periods.

As you know your loads even a 3kW should serve you well.

Have a look at the Hikvision DS-UPS3000 Available at just over R4000 for a 3kVA unit.

Doesn't seem like an online double conversion ups

On 2026/03/22 at 9:58 AM, abd7 said:

Doesn't seem like an online double conversion ups

You could be right. I took it a camera supplier putting their name on equipment should then ensure the cameras work all the time.

The description also indicates always on which i took as no change over time.