RD6030 other options - Page 1
Forum section: electronics / testgear

author: ptluis
author_rank: Frequent Contributor
timestamp: May 31, 2025, 06:15:36 pm
content: I'm looking for a power supply module similar to Riden RD6030 but with a much higher Amp setting.This one goes up to 30A, I'm in need of something that goes minimum 60+ amps, ideal between 80-100A, but with the same flexibility as the RD6030 module.I contacted Riden but according to their reply 30A is the maximum they have. Does anyone knows of other modules that fit inside my needs? thank you

author: kmoonwalker
author_rank: Frequent Contributor
timestamp: May 31, 2025, 06:22:09 pm
content: try searching for second hand HP/TDK Lambda or some other quality unit - usually cheap options are ending on 30amps or they have more but in reality only with compromise between output voltage and amps to draw plus some of them will use close to almost second to that for providing that power

author: Tjuurko
author_rank: Regular Contributor
timestamp: June 03, 2025, 03:41:02 pm
content: Alternatively, connect 3 pieces of RD6030 in parallel.

author: electr_peter
author_rank: Unknown
timestamp: June 03, 2025, 07:22:15 pm
content: Quote from: Tjuurko on June 03, 2025, 03:41:02 pmRD Tech does not recommend connecting in series/parallel, allthough you could do that.Check Gophert CPS range, there are some 30-60A models.

author: myf
author_rank: Regular Contributor
timestamp: June 04, 2025, 07:56:51 am
content: Hello,Do you protect each RD6030 with a diode in series (to avoid a reverse current in the power supply) before connecting them in parallel? Or do you only connect the RD6030s (without a diode)?---|(ground)---RD6030--diode --||(ground)---RD6030--diode --||(ground)---RD6030--diode --|----

author: ptluis
author_rank: Frequent Contributor
timestamp: June 04, 2025, 06:40:12 pm
content: Quote from: electr_peter on June 03, 2025, 07:22:15 pmYes according to ruideng it's not advisable to connect those units in parallel, the units could be damage.Using a diode in series with every output of Rd6030 requires some high power diodes that I don't have.The diode "trick" work fine with Rd6006 as long as the diode voltage drop is taken in consideration when selecting the output voltage of each unit.As a test, I connected 3x Rd6006 in parallel with diode on each output, and supply power to a 24v-230V pure sine wave inverter. It worked just fine supplying power to a freezer and a 55 inch TV.

author: kmoonwalker
author_rank: Frequent Contributor
timestamp: June 04, 2025, 10:23:15 pm
content: this is good until one starts to misbehave and you will have troubles to find out which one at first hand - made my share of such experiments in the past and learned that if you wanna real robust psu TDK Lambda is really good choice (plus I was surprised 20 years ago how much less it drawn from outlet compared to my custome made set

author: ptluis
author_rank: Frequent Contributor
timestamp: June 05, 2025, 12:25:54 am
content: Quote from: kmoonwalker on June 04, 2025, 10:23:15 pmSince none had misbehave I think it could be possible to detect which one is the culprit by looking at the values of voltage and amps on their respective LCDs, it's my guess.Anyway I'm looking at TDK Lambda products, at least to be used on my deep well pump backup power.

author: thm_w
author_rank: Super Contributor
timestamp: June 05, 2025, 12:52:06 am
content: wanptek had some 60A and 100A supplies:https://www.aliexpress.com/item/1005007717522802.htmlNo idea if they are any good.https://www.eevblog.com/forum/testgear/wanptek-kps-series-power-supplies/Random 125A unit:https://www.aliexpress.com/item/1005008636101008.html

author: kmoonwalker
author_rank: Frequent Contributor
timestamp: June 05, 2025, 01:09:42 am
content: that link is not working for me but I found Wanptek KPS PSUs still best I can see with 60V is only 50 amps. 100 amps is on 15 and 30 V models (or they cannot offer stronger ones to EU market)have no idea how good they are - I vaguely remember someone had some small unit like 10 amps and not complained but I did not played with it so no opinion.

author: ptluis
author_rank: Frequent Contributor
timestamp: June 05, 2025, 01:21:14 am
content: Quote from: kmoonwalker on June 05, 2025, 01:09:42 amI own one 60V 10A for some years and no problems, But those PS can't be used for my current objective because the main source are DC battery packs, and since those PS are smps ones they require some degree of modification to function properly with lower voltage on primary side, not worth the trouble.

author: tautech
author_rank: Super Contributor
timestamp: June 05, 2025, 01:47:56 am
content: 40V 90A enough ?SPS5043Xhttps://int.siglent.com/products-overview/sps5000x/

author: kmoonwalker
author_rank: Frequent Contributor
timestamp: June 05, 2025, 03:22:11 am
content: Quote from: tautech on June 05, 2025, 01:47:56 amyou can pull only 1080W total from it not 40x90=3600W...

author: tautech
author_rank: Super Contributor
timestamp: June 05, 2025, 04:01:29 am
content: Quote from: kmoonwalker on June 05, 2025, 03:22:11 amSure I know that as have SPS5042X myself (40V 60A) and use it to its max but nowhere in this thread has the OP made a firm voltage requirement, only a 80-100A requirement which SPS5043X meets and why I asked if it was enough.

author: kmoonwalker
author_rank: Frequent Contributor
timestamp: June 05, 2025, 04:15:55 am
content: he mentioned some pump and this" main source are DC battery packs, and since those PS are smps ones they require some degree of modification to function properly with lower voltage on primary side, not worth the trouble."so I dunno perhaps that Riden he has is easier to modify to such conditions and I suppose that pump is not 1080W/90A=12V only...your model gives 40 amps also with 12V output (720W) or the datasheet is incorrect

author: kmoonwalker
author_rank: Frequent Contributor
timestamp: June 05, 2025, 04:16:45 am
content: I think if that pump was working on 12V/24V he would not need any PSU to increase the voltage...

author: tautech
author_rank: Super Contributor
timestamp: June 05, 2025, 04:28:39 am
content: Quote from: kmoonwalker on June 05, 2025, 04:15:55 amYes, OP hasn't given us enough to work on other than for a backup supply for his deep well pump which may be DC supplied that might suggest it's solar/battery powered where low light, solar controller and batteries are all possible failure points. Addition of a wind turbine can help reduce power dropout risk.We should wait until we know more........

author: kmoonwalker
author_rank: Frequent Contributor
timestamp: June 05, 2025, 04:46:50 am
content: btw I think for him it would be best to make or purchase some DC-DC step up power convertersomething alike thishttps://daygreen.com/en-en/products/12v-to-28v-100a-2800w-dc-dc-step-up-converter-voltage-regulator?srsltid=AfmBOopSIIYz4V6ONnzbvEHmXepSyQunAF9BglbfQEcDkMJiZNhQcVlAbut for proper output voltage he needsit should have way less power losses

author: ptluis
author_rank: Frequent Contributor
timestamp: June 05, 2025, 03:41:47 pm
content: First, thank you for your replys.Second, Sorry it's my fault for not providing enough details, so here they are:For now, my objective is to create modular backup power units, i own around 40 battery packs of 42V, 54.6V and 75.6V (full charge) and individual power packs range from 1.2KW to around 10.8KW(the 75.6V ones) They use 18650 (few packs) and 21700 (almost all packs) Samsung, LG and Panasonic lithium cells. All packs contain BMS. The packs are charged from different sources AC plug, solar panel ( although not much efficient due to limited sun and position after certain hours of the day, I explain more bellow) and wind generator (there's almost wind everyday).Those battery packs will be connected to 12 or 24VDC-235VAC Pure Sinewave inverters acording to the device being connected. I want to swap batteries fast and easy when needed, put to charge the empty ones while the full charged ones are on service.Due to installation limitations (shadows and mainly sun reflexions to surrounding houses) I can't install solar panels in an effective way, so can't go that way. Solar power only used a few hours daily. I also own a 12KW gasoline generator for critical situations but avoid its use due to high noise and smoke.I own a 75mts deep well, with a 1KW 230VAC soft start pump, it works in continuous periods of around 2.30 minutes to fill a 400 liters pressure tank ( when the pressure tank empties to around 200 liters it starts working and refill the missing 200 liters)Why I want a control module like RD6030? because of its flexibility and ease in selecting the output voltage, i know input won't support 75.6V packs, for these ones I will choose a fixed DC-DC converter and they will be used in the more demanding devices.By using the RD6030 I'm able to supply laptops, servers, routers, by just adjusting the output voltage to the required needs since the majority of these devices operates at lower voltages but different ones. Also color laser printers will be connected but through inverters.But RD6030 its limited to around 700W when output is set to 24V, not enough for professional laser printers.You may say why I won't buy some power stations, well its a high investment, I can't swap batteries, and they are closed systems without parts available. Then I already have all those packs and some inverters available. Buying units like RD6030 or specific DC-DC converters is a smaller investment.Disassemble all packs and rebuild is not an option due to the differences in internal resistance of the cells leading to an unbalanced pack and since I can't have an exclusive solar system there's no reason on doing that.So finding modules like RD6030 but with higher amperage is the way to go for the present scenario.

author: kmoonwalker
author_rank: Frequent Contributor
timestamp: June 05, 2025, 04:31:14 pm
content: well it is certainly not easy to solve thismy usual approach would be to automate it a bit -> integrate all power packs into one system using some DC-DC adapters and conditional switching if you say they have each own battery management system and then come raspberry or even voltage controlled switch to swap between charging to power draw to make each of them kinda selfsuffcient and managed so you only loose the power if there is not power at all - but it adds the cost as you need extra charger and dc-dc converter for each part of the system for starter - but it also adds lots of robustnessyou could also combine it with a solution made in the past here when electricity lines in buildings were very weak that there were priority switches so when you turned on an electric kettle or heater it was disconnecting the washmachine or vice versa to not activate the main circuit breaker and have a total shutdownin your case you can make something alike this but oriented towards keeping certain, important at given moment, things running at cost of others if not enough "juice"I seen it few times even in houses for example in mountains where mains power is not very good, voltage usually very low so they first of all need AC line voltage stabilizers that can get for example 180V input AC and output 230V as equipment here expectsMain problem in your case with all those steps of power conversion are those steps as on each step you are loosing quite some powerRaiden maybe elastic but I dunno about efficiency at such conditions, then you make another conversion and anotherAs one solution for this to charge and then draw power from batteries of multiple types and voltages is not easy to get (and not cheap) I would try to redesign it (I think that you are already on it) so each type of batteries would have own application aka this powers the well and other the drill or whatever with relays to switch the given pack to charging and get juice from another (still this makes big cost of cabling etc and it all needs a very well thought design before doing anything and some small scale test like two packs exchange before you will make all interconnected and then some will have sparkling or else evil issues)

author: ptluis
author_rank: Frequent Contributor
timestamp: June 05, 2025, 05:23:02 pm
content: Quote from: kmoonwalker on June 05, 2025, 04:31:14 pmHi you have some interesting points here, automatic switching will be the next step.I'm planning for dedicated modules for each and every high consumption devices, like the well for example. for the well the plan is to attach a solar panel to make it totally independent from the grid. I'm still making some experiments to find out if that's acceptable. For the washing, dry machines, another independent one because they are in a separated division outside the house.The final goal is to create a system totally independent of the grid, but that will work on such a way, that if power fails on one node it will keep working on the others, and for the modules to be fast to replace in case of failure.

author: kmoonwalker
author_rank: Frequent Contributor
timestamp: June 05, 2025, 05:35:35 pm
content: Quote from: ptluis on June 05, 2025, 05:23:02 pmjust do not spare on wires gauge, etc and recommend that you ask some good electrician to take a look at it - he will certainly improve things and make it all safer - with such amps better to use his experience than have an electric arc and fire out of sudden learning hard wayI would avoid transferring DC over long distances - make that separate or on AC if necessary - usually huuge losses with such amps draw

author: tautech
author_rank: Super Contributor
timestamp: June 05, 2025, 08:23:36 pm
content: Now with more info....What comes to mind is a full redesign using big Lithium cells and an electric forklift charger, all in one location with AC inverter and any DC boosts as required.These guys have been around for years and will likely have a EU agent:https://en.winston-battery.com/?cnxdc/

author: kmoonwalker
author_rank: Frequent Contributor
timestamp: June 05, 2025, 09:46:45 pm
content: Quote from: tautech on June 05, 2025, 08:23:36 pmnow when you mentioned this there is even better solution - start replacing after time current batteries into low discharge train traction models (much sturdier, will extend their life significantly in case everything goes down frequently)they make not bad ones used in industry, etchttps://siap.pl/

author: ptluis
author_rank: Frequent Contributor
timestamp: June 06, 2025, 07:08:26 pm
content: Quote from: kmoonwalker on June 05, 2025, 09:46:45 pmThis will be something I will end up doing, because as the packs decrease in efficiency or I sell them, the best thing to do will be to build new packs with lifepo cells, they are more stable and allow more cycles. It won't be a problem. But for now I will take advantage of what I have in excess. I just need to search for new and more efficient solar technology regarding solar panels. I'm doing some experiments with mirrors directing the light beam to the panels, instead of rotating the panels to the ideal position, since I can't mount them as I explain before

author: kmoonwalker
author_rank: Frequent Contributor
timestamp: June 06, 2025, 08:53:33 pm
content: photovoltaic panels are not "very" efficient even if properly installed and exposed to strong Sunlight they will only produce large amounts over certain period of time per day but then they need cooling system etc cause with too much temperature they also produce less...there were in the past ways to increase a bit delivered energy amount during days with panels for UV but nowadays it is safe to assume that almost of what is on market and not very old is constructed to work this wayinstead of mirrors etc which also have losses on refraction I would rather find some nearby area or adapt part of roof to install panels there and have em properly exposed to Sunlighteven panels with perovskite would not have big difference in my opinion (thou yes you would have more energy with them replacing current panels in same places)But way more will be from proper installation of existing ones if they are in good condition etc

author: tautech
author_rank: Super Contributor
timestamp: June 06, 2025, 09:23:32 pm
content: Much depends on care taken in PV array installation....Depending in location array angle and degree bearing needs be optimized for time of year lowest solar exposure.Battery DOD is of highest concern for which one needs know their daily load then add a good % more for future changes to the load.Currently have a 5+yr old installation with just 3 panels that so far have produced nearly 3 MWhfor a remote data relay site now using a 11 GHz dish for 1 Gb duplex backhaul where we are just scraping through as the system design was for a smaller dish on the 5 GHz band and drew less power.The 4x 160Ahr 12V SLA's in Series/Parallel for 24V are managing with some wind support.

author: kmoonwalker
author_rank: Frequent Contributor
timestamp: June 06, 2025, 09:37:06 pm
content: true - it needs to well calculated, designed and then properly made or therre will be constant problems or complaints

author: tautech
author_rank: Super Contributor
timestamp: June 06, 2025, 09:48:27 pm
content: Quote from: kmoonwalker on June 06, 2025, 09:37:06 pmMuch is not hard....if you have a little gear, hell even the array bearing and angle can be done using the apps on a modern smartphone.

author: kmoonwalker
author_rank: Frequent Contributor
timestamp: June 06, 2025, 10:37:03 pm
content: usual problem is thatafter convo with some friends I arrived to see what is on then see that seller promised them some yeld from installation and it is not working well enough - then as you say calculator and common sense... if panel has some efficiency and surface and there is some amount of them one cannot calc 100% possible yeald per 12h per day (yep I seen such ... )then I tell em that it is working OK and yeld is OK for this (or the inverter is not good quality, etc) but usually just scale is too smallit is very similar to ACin one production company that I usually do IT care they have a large production room and on side room they have Ersa N Wave unit that alone consumes 32 kW or something power and heats up everything like crazy and I mean crazy hot...+ there is lot of windows from sunny side on production room, lot of folks, some other equipment there, etc like in such companyso they had two offers one with 14kW AC and other with a bit more and all told em that there 30-40W/m3 is max to calc as total superb for this(it was more just by calculation in head with 30W/m3 just raw estimating the volume in my head - then after adding nwave)So I called a friend to come in and told him +/- how things are and how hot it gets so there are two 18kW ceiling units and he himself said that this is preliminary to evaluate if one more will not be necessary (but they do not use N Wave these days so often it is really OK) + we more than doubled the airflow -> ventillation of N waveMore to that there is now few more small AC units here and there that they did not wanted but after I told him to install one in office he called me laughing that from that it exceeded 5 times his preliminary estimation and still he left place on roof mount for that extra one on production hallSo when I say well calculated I mean this xD

author: BlakeSeven
author_rank: Newbie
timestamp: July 22, 2025, 11:11:32 pm
content: For low-light and shaded conditions, you can use solar panels such as the now-discontinued Unisolar PVL-144 triple junction amorphous silicon solar cells. These will never compete with modern panels in direct sunlight, but will squeeze every watt out of your square meterage. I don't know what the modern equivalent is, but there is a use-case, so i reckon someone is making them...