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Author Topic: Bench power supply recommendations?  (Read 616 times)
fourfootfarm
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« on: March 26, 2018, 04:48:33 PM »

Hi,

I could do with something with a decent Amp output and settings for CC and CV for charging lithiums.

eblag is awash with hundreds of different indistinguishable nonbranded ones which makes choosing difficult.

Any recommendations?

Cheers

James
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500w Turkish Turnip. EPsolar 30a MPPT & Tristar 45's . Assorted chinese junk. Hodge Podge of solar ~ 4500w. Various generators and 1000ah 24v forklift battery.
nowty
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« Reply #1 on: March 26, 2018, 08:06:59 PM »

Depends how many volts and amps you want.

I bought this one recently 10A and 32V from eblag, so 320w output max for under 50. If you want more power, then expect to pay several times more for one.

Its easy to use as I did not even need to bother with the instructions and is very accurate, I measured it against a precision voltage reference and it was only 2mv or so out at 5v output.

I used it to balance out a 24v lithium bank at full power for several hours and it did not overheat, it has a cooling fan in it.

https://www.ebay.co.uk/itm/DC-Power-Supply-32V-10A-Variable-Precision-Adjustable-Dual-Digital-Lab-Grade-NEW/263409876536?epid=18012239411&hash=item3d5473be38:g:-PsAAOSwvgtami3c

My only moan was the supplied test leads as they almost melted over about 5 amps, but that was soon changed.
« Last Edit: March 26, 2018, 08:08:33 PM by nowty » Logged

10kW of PV.
20 kWh storage in lead acid batteries.
48 kWh storage in lithium batteries.
10 kWh storage in hot water.
16 kWh storage in storage heaters.
Water harvesting from underground river.
A few cold frames and raised beds.
fourfootfarm
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« Reply #2 on: March 26, 2018, 08:43:54 PM »

Its always nice of them to include self fusing leads at no extra cost.

Cheers Nowty I will have a look at that one.

I'd like 48v ideally for controller testing but 10a is plenty. Will have a look at that brand and see if they have any other options. I guess thats another leap up in capacitor cost.
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500w Turkish Turnip. EPsolar 30a MPPT & Tristar 45's . Assorted chinese junk. Hodge Podge of solar ~ 4500w. Various generators and 1000ah 24v forklift battery.
nowty
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« Reply #3 on: March 26, 2018, 09:25:09 PM »

Its still probably cheaper to buy two of them and daisy chain, that's what I will do if I upgrade to a 48v inverter.

Most of the higher voltage ones I have seen are simply 30v dual supplies which you series connect up.
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10kW of PV.
20 kWh storage in lead acid batteries.
48 kWh storage in lithium batteries.
10 kWh storage in hot water.
16 kWh storage in storage heaters.
Water harvesting from underground river.
A few cold frames and raised beds.
fourfootfarm
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****
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Posts: 279



« Reply #4 on: March 29, 2018, 05:51:35 PM »

Cheers Nowty, will give it a go.

After splashing out a new Charge controller it might have to wait till next month!
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500w Turkish Turnip. EPsolar 30a MPPT & Tristar 45's . Assorted chinese junk. Hodge Podge of solar ~ 4500w. Various generators and 1000ah 24v forklift battery.
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