Quote me on UPS options to keep basic power alternatives available for working from home

Koosvanwyk

Expert Member
Joined
Aug 6, 2015
Messages
1,051
@-=AlteredNeon=-

You need an inverter, not a UPS.

Preferably a low frequency inverter (i.e toroid transformer based), not the high switching crap 99% of inverters tend to be, especially if you intend to wire it into your house. (hint - if the inverter weighs less than 25 kg for 3kW, it is not a low frequency inverter)

You also need to bite the bullet and get lithium iron batteries for it (Iron, not ion. LiFePo cells are what you want)

You're looking at ~R11k for the inverter, and at 24V 100Ah ~ R9000 for the batteries (i.e. 2.4 kWh storage)
Most people can get by with a properly sized HF, if you're running very high surge devices like lots of pumps or big shop tools, which the OP is likely not doing, a LF inverter would be the way to go.

HF however dominates in residential application when wired into DBs, for good reason.

Modern HF inverters have become more efficient than their LF counterparts at a significantly lower price point. Their are lots of HF inverters on the market that than give twice their rated output for 10s, which in close to LF territory and more than sufficient time for devices that require a large start up power.

Just like you get HF crap, you get LF crap as well.
 

-=AlteredNeon=-

Well-Known Member
Joined
Sep 29, 2021
Messages
155
Hi All.

I have purchased my first "Trolly" as recommended by @Cacti

I plan to purchase another except with the Upgrade to 100ah LITHIUM Deep Cycle battery x2 (250 battery cycles to 2000+ cycles) in a few months. R20K bites my savings too hard for now.
We have not had a load shed again, was hoping we would have to test this, lol

Anyway I'd like to say @ADrunkTeddyBear I will give you first opportunity to take my 5 2Kva RTC UPS's for free, however you need to also take all my dead batteries too. I have like 10 of them.
You can be my easy Disposable Man :)
If you willing. (Just hope you are in the Cape Town area to collect)

May be awhile, but I will be in contact with you.
 

Cactus

Expert Member
Joined
Jan 16, 2015
Messages
1,959
Hi All.

I have purchased my first "Trolly" as recommended by @Cacti

I plan to purchase another except with the Upgrade to 100ah LITHIUM Deep Cycle battery x2 (250 battery cycles to 2000+ cycles) in a few months. R20K bites my savings too hard for now.
We have not had a load shed again, was hoping we would have to test this, lol

Anyway I'd like to say @ADrunkTeddyBear I will give you first opportunity to take my 5 2Kva RTC UPS's for free, however you need to also take all my dead batteries too. I have like 10 of them.
You can be my easy Disposable Man :)
If you willing. (Just hope you are in the Cape Town area to collect)

May be awhile, but I will be in contact with you.
Don't drain these batteries, otherwise it will end up as a dead trolley. Probably up to 50% is OK I'd guess. The lithium ones will be much better :)
 

Speedster

Honorary Master
Joined
May 2, 2006
Messages
21,685
Hi All.

I have purchased my first "Trolly" as recommended by @Cacti

I plan to purchase another except with the Upgrade to 100ah LITHIUM Deep Cycle battery x2 (250 battery cycles to 2000+ cycles) in a few months. R20K bites my savings too hard for now.
We have not had a load shed again, was hoping we would have to test this, lol

Anyway I'd like to say @ADrunkTeddyBear I will give you first opportunity to take my 5 2Kva RTC UPS's for free, however you need to also take all my dead batteries too. I have like 10 of them.
You can be my easy Disposable Man :)
If you willing. (Just hope you are in the Cape Town area to collect)

May be awhile, but I will be in contact with you.
You can get quite good money for those batteries by dropping them off at a scrap metal joint.
 
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