Eltek LP Telecom DC Power System with Battery Backup

Description

An Eltek LP telecom DC power system, supplied with rectifiers and a battery backup module. This is central office style −48 V DC plant, not a UPS and not a rack PDU.

How an Eltek DC plant is put together

Eltek systems are modular by design, and knowing the four parts tells you what you are looking at in the photographs:

a shelf that provides the backplane, the DC busbars and the distribution breakers;
hot-pluggable rectifier modules that convert AC mains to a regulated −48 V DC and float-charge the battery string — you add modules for more current, and one spare module gives you N+1 redundancy;
a controller that handles float and boost charging, low-voltage disconnect, temperature compensation and alarms; and
the battery connection, which is what makes it a power system rather than a power supply — the load sits on the battery bus, so a mains failure is not a transfer event, it is simply the battery taking over with no break at all.

What this listing does not tell you, and what to ask for

The import gave no model number, no rectifier part numbers, no output current rating and no controller type, and we are not going to reverse-engineer those into a spec table to make the page look complete. Before you buy, ask us for photographs of the labels and we will read off:

the shelf model and the rectifier part numbers and count;
the total rated output current in amps at −48 V;
the AC input requirement — single or three phase, and the voltage;
the controller model and whether it has its Ethernet management module; and
the condition and age of the battery module. Assume any battery in surplus telecom gear is at or past end of life and price a replacement string in. Batteries are a consumable; the shelf and rectifiers are the asset.

Condition and warranty are not stated in this listing, so get those in writing too.

Why a miner would look at −48 V plant at all

Because the same properties that made it telecom standard — N+1 redundancy, no transfer break, decades of runtime engineering — are what a site controller, network gear and monitoring want when the mains drops. It does not power ASICs, which are AC machines: a modern miner wants 200–277 V AC and pulls kilowatts. What −48 V plant is good for is keeping the switch, the site controller and the cameras alive through an outage so you can see what happened to the machines.

More telecom and DC power systems, and the full surplus and industrial equipment hub.

What’s in the box

1 × Eltek LP Telecom DC Power System w/ Rectifiers & Battery Backup Module
Nothing that is not listed above. Cords, controllers, brackets and spares are only included when this listing names them — if you need to know before you pay, ask on +1 (781) 577-0377 or ns@ingmining.com and we will confirm in writing what is physically in the crate

Questions buyers ask about this DC plant

What model is it, and what is it rated at?

The import gave no model number, no rectifier part numbers, no output current rating and no controller type, and we are not going to reverse-engineer those into a spec table to make the page look complete. Ask us for photographs of the labels and we will read off the shelf model, the rectifier part numbers and count, the total rated output current at −48 V, the AC input requirement and the controller model.

What condition is the battery module in?

Not stated, and the safe assumption is the pessimistic one. Treat any battery in surplus telecom gear as at or past end of life and price a replacement string into what you pay. Batteries are a consumable; the shelf and the rectifiers are the asset you are buying.

Can I run ASIC miners off this?

No. Miners are AC machines — a modern one wants 200–277 V AC and pulls kilowatts. What −48 V plant is genuinely good for on a mining site is keeping the switch, the site controller and the cameras alive through an outage, because the load sits on the battery bus and a mains failure is not a transfer event at all.

Shipping cost for this exact item, and how warranty and returns work here, are answered in the Shipping & buying tab on this page. Anything else, ask a person on +1 (781) 577-0377 or ns@ingmining.com — on surplus stock we would much rather answer the question than take a return.

Related hardware and where this sits in the store

Other telecom and DC power equipment from the same clear-out:

Categories: Surplus and Industrial Equipment and Telecom and DC Power Systems. See everything in Surplus and Industrial Equipment.

Where this listing sits

This is surplus, not mining hardware. We buy equipment lots and estate lots, and things arrive in them that have nothing to do with ASICs. Rather than force them into a miner category they do not belong in, they get listed for what they actually are, in surplus and industrial equipment. The condition of this item is whatever the description on this page says it is — and on several of these listings what it says is that the condition was never stated to us.

What our condition words mean

These are the only words we use, on surplus as much as on machines, and each one means a specific thing. They are not interchangeable and we do not soften them to move stock.

New	Unused stock. Factory sealed unless the listing says otherwise — “new, open box” means exactly that, and the listing will say it.
Tested	Second-hand, and it powered up and did what it is meant to do while we had it. What was actually checked is stated on the listing. Expect cosmetic wear.
As-is / for parts	Sold with no working claim at all, at a price that reflects it. Buy these to repair or to harvest.
Untested	We have it, we have not powered it, and we are not going to pretend we did.
Not stated	The most common answer on this shelf, and the honest one. Equipment lots arrive with no history, so where the listing does not name a condition we do not invent one — ask, and we will photograph the actual item and tell you what we can see.

What a condition here does not mean

Cosmetic wear is not a fault. Dust, scratches, scuffed labels and discoloured plastics are normal on equipment that has been in service. We photograph what we have; if the pictures matter to you, ask for more and we will take them.
A condition is not a warranty. Warranty terms are stated per listing, never per store — see the Shipping & buying tab. On surplus, assume there is none unless the listing names one.
A part number on the page is not a part number on the unit. Where a listing quotes a distributor catalogue or a manufacturer record rather than the label in front of us, it says so. Confirm against the actual label before you order anything that has to fit something else.
We will not invent a condition to fill a field. Several of these listings say outright that the import gave us no model number and no condition, and we would rather publish that than a guess that reads better.

How we describe surplus

There is no bench procedure behind these listings and we are not going to imply one. What is behind them is the unit, its labels, and the manufacturer’s own published record for the part number — and where those disagree, or where a distributor catalogue is the only source, the listing says which it is quoting. Before you buy anything on this shelf, ask us: we will photograph the labels on the actual item and put what we can see in writing. It costs us ten minutes and it is the only thing that reliably prevents a return.

Shipping

Shipping this item inside the United States costs $49.99 by UPS Ground — that is the rate the checkout will charge, read from the store’s own shipping settings, not an estimate. Orders ship within 7 business days.

Outside the United States the checkout quotes a flat international rate. On multi-unit or pallet orders, contact us before ordering so freight to your destination can be confirmed properly. What to check when the pallet arrives, and how a freight claim works, is covered in the mining hardware shipping guide.

What to do the day it arrives

Photograph the pallet or the box before you open it, and keep the packaging until you are satisfied. Freight claim windows are short, and damage found on day two is a conversation while damage found on day thirty is an argument.

This is surplus stock rather than mining hardware, so there is no hashrate to verify on arrival. Check it against the part numbers, ratings and condition stated on this listing, and tell us straight away if what arrived is not what the page describes — that is the check that matters on equipment-lot stock, and it is the one we will stand behind.

Condition, warranty and returns

Condition: Condition not stated on this listing, so none is claimed — ask and we will confirm in writing.

Warranty is stated per listing, not across the catalogue. Some units carry a manufacturer term and say so above, naming the term and the date it runs from. Many units, particularly used and AS-IS stock, carry none, and those listings do not claim one. There is no blanket warranty covering a catalogue that runs from sealed factory stock to a hashboard sold for parts. On surplus stock in particular, assume none unless this listing names one.

Returns: ask for the terms on this unit before you pay. No single returns window is published for the whole store, because the sensible terms on a tested working machine and on a board sold AS-IS for parts are not the same terms. Email or call and ask what applies to this exact item — it is a two-minute conversation and a great deal cheaper than a dispute.

Who you are buying from

ING Mining LLC, Hanson, Massachusetts. ING MINING® is a registered U.S. trademark; our marketplace feedback is on the reviews page and the longer version of who we are is on about. Reach a person on +1 (781) 577-0377 or ns@ingmining.com.

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