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Easun ESB 3kW 24V - opinions and experiences of Off-Grid inverter users sought

ArturAVS 30051 52
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What are users' experiences with the Easun ESB 3kW 24V off-grid inverter, and is it worth buying?

Users report that Easun off-grid inverters generally work fine, but you should verify whether the model is MPPT or PWM before buying because Easun units are sold in both versions [#19922589] One user said his inverter runs without glitches, the protection works, shorting the panels caused no damage, and even a 2000 W kettle works normally; standby draw was described as low, though the fans are noisy [#19795684][#19796136] Another owner of a 3.6 kW EASun said it is cheap and very configurable, but at around 80% load it sounds like a jet taking off [#20443114] He also warned that the electrolytic capacitors are low quality and may need replacement after the warranty period [#20443114]
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  • #1 19794563
    ArturAVS
    Moderator  
    While browsing through various offers of Off-Grid inverters, the title inverter caught my eye. Quite an affordable price and the possibilities are a bit too much for my needs, but a spare one won't hurt :D . I'm looking for user opinions, maybe someone on the forum has and uses it and will share their observations and impressions of the operation of this inverter?
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  • #2 19794575
    kmarkot
    Level 31  
    I don't use it, but EASUN solar inverters have a PWM charger
    Better look for something with MPPT
    SANYU SPV18-3024 VPM
    https://www.sklepfalowniki.pl/inwertery-fotowoltaiczne-spv18-3024vpm.html
    or
    Solar Inverter Off Grid Inverter with MPPT Green Cell Solar Charger 24VDC 230VAC 3000VA/3000W Pure Sine Wave
    https://greencell.global/pl/inwertery-solarne...4vdc-230vac-3000va3000w-czysta-sinusoida.html
  • #3 19794576
    Maverick73
    Level 36  
    Affordable price is it?
  • #4 19794582
    ArturAVS
    Moderator  
    Maverick73 wrote:
    Affordable price is it?

    https://allegro.pl/oferta/inwerter-hybrydowy-...=google&utm_medium=cpc&utm_campaign=_dio_prze mysl_pla_ss&ev_adgr=przemysl&ev_campaign_id=14937753754&gclid= Cj0KCQiAt8WOBhDbARIsANQLp96n_WzSWHRQVgx4B1dD__R4f1NUTV_DVr3Wt-6_qChRoXd1Ait5Tl0aAnp1EALw_wcB

    For me it's affordable. GreenCell is out of the question due to unfavorable opinions about the company and its products. This Sanyu seems interesting, I have to read the instructions carefully.
  • #5 19794927
    prose
    Level 36  
    I have it installed and it works fine.
  • #6 19794944
    ArturAVS
    Moderator  
    This Sanyu is quite interesting and maybe I will buy it in the 2kW version. The best version would be 1kW, but unfortunately it is 12V.
    prose wrote:
    I have it installed and it works fine.

    Anything more? Does it catch any software glitches, like communication and security?
  • #7 19795684
    prose
    Level 36  
    ArturAVS wrote:
    This Sanyu is quite interesting and maybe I will buy it in the 2kW version. The best version would be 1kW, but unfortunately it is 12V.
    prose wrote:
    I have it installed and it works fine.

    Anything more? Does it catch any software glitches, like communication and security?
    There are no hiccups, everything works as it should, I have a 6 kWh battery, the protection is fine, I shorted the panels once and nothing happened, the 2000 W kettle boils and doesn't even get warm, I'm testing it now, the whole apartment has the TV set off, the fridge 2 pcs lighting, hydrophore and hula.
  • #8 19795701
    ArturAVS
    Moderator  
    It would also work non-stop for me, but the power would be much lower, although if I installed it at home, it could include, for example, a kettle + an oven. Tell me if you can, of course, did you measure the current consumption from the battery without load?
  • Helpful post
    #9 19795713
    prose
    Level 36  
    Easun ESB 3kW 24V - opinions and experiences of Off-Grid inverter users sought

    Added after 3 [minutes]:

    ArturAVS wrote:
    Tell me if you can, of course, did you measure the current consumption from the battery without load?
    No, I haven't done it yet, but I'm going to check it out.
    Attachments:
    • Easun ESB 3kW 24V - opinions and experiences of Off-Grid inverter users sought 1.PNG (77.85 KB) You must be logged in to download this attachment.
    • Easun ESB 3kW 24V - opinions and experiences of Off-Grid inverter users sought 20220102_204118[1].jpg (454.71 KB) You must be logged in to download this attachment.
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  • #10 19795778
    Maverick73
    Level 36  
    Wow, what a battery store 👀
    How long have you had it tied up like this?
  • #11 19795865
    prose
    Level 36  
    Everything was measured and connected. AGM and Ni-Cd, nickel-cadmium batteries have been working for 7 years and were connected to the UPS. AGMs from 3-year-old BMWs hold well.
  • #12 19796038
    specek
    Level 16  
    Gentlemen, how about the noise of the fans from this inverter? And is it true that it draws from the battery as much as it can, even with the AC power on?
    Quote from Alledrogo: "one drawback that disqualifies such equipment for me is that in the bypass mode with the mains charging turned off and only from the panels, the equipment draws about 0.7 ampere from the batteries for its own needs, why not from the mains, the oldest Chinese doesn't know, poor a week or two without sun and you wake up with discharged batteries, I don't understand this philosophy of not protecting the energy storage when mains power is available."
  • #13 19796047
    Maverick73
    Level 36  
    @prose I don't think I'm worried about having such batteries at home :)
    But the fact is that I also had to turn off my converters because when the weather is not good, they consume battery power...
  • #14 19796136
    prose
    Level 36  
    Maverick73 wrote:
    But the fact is that I also had to turn off my converters because when the weather is not good, they consume battery power...
    specek wrote:
    Gentlemen, how about the noise of the fans from this inverter?
    I have it in the utility room, it doesn't bother me, but it's noisy, and as far as battery discharge on standby is concerned, it doesn't consume much. The UPS consumed only 30 Wh.
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  • #15 19796265
    Maverick73
    Level 36  
    If I had that much battery, I wouldn't turn it off in the winter. because that's all I care about.
    In total, I have 3 of them, including the Volt you don't like, which draws electricity from the grid and powers my central heating furnace 24 hours a day.
  • #16 19799027
    ArturAVS
    Moderator  
    specek wrote:
    Gentlemen, how about the noise of the fans from this inverter?

    For me it is not very important, especially since ultimately it will be built in a cabinet with its own fans. Although I don't like the PV voltage, I have the panels connected in parallel, which gives ~33VDC. I would have to switch to a serial system and again this does not suit me for the auxiliary power supply (24V). I'll browse the internet some more, maybe I'll find something decent. This Sanyu has MPPT 30-80V so maybe...
  • #17 19807089
    ArturAVS
    Moderator  
    So, looking through other offers and models, I will probably take a chance on this one; https://allegro.pl/oferta/gf1000-inwerter-off-grid-1000w-24vdc-ladowarka-m-11564035994 The parameters suit me perfectly and the price. It will also fit into the control cabinet without major rearrangements :D . What do you think? Is it worth it?
    Attachments:
    • user_manual_off-grid_solar_inverter_gf100w-2400w.pdf (6.74 MB) You must be logged in to download this attachment.
  • #18 19807332
    prose
    Level 36  
    ArturAVS wrote:
    What do you think? Is it worth it?
    The one from Alle has 950 W, a bit low in my opinion.
  • #19 19807344
    ArturAVS
    Moderator  
    From the panels I have 0.825kW max. with the impossibility of expansion due to technical reasons. Needs are about 400W.
  • #21 19807395
    ArturAVS
    Moderator  
    It caught my eye, so I bought it. It fits perfectly in terms of current and voltage and at a decent price.
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  • #22 19809037
    Maverick73
    Level 36  
    Which one do you want to buy, PWM or MPPT?
  • #23 19809041
    ArturAVS
    Moderator  
    With the power I have, PWM is out of the question. This GF-1000/24 probably has an MPPT controller, although I can't find it anywhere in the manual. I don't want PWM, especially since maybe in a month I will buy a little more AGM batteries and it would be a shame to destroy them with PWM, I don't trust such regulators.
  • #24 19809133
    Maverick73
    Level 36  
    I don't think I saw whether it was MPPT or even whether it had a full sine.
    Typical budget PWM for small 1-2 panel installations, but I don't know if it destroys batteries.

    Half an hour ago I was in the basement to check in my control room, the tracers had 5A boosted to 10A, 300W of consumption and that's it :)
  • #25 19819196
    ArturAVS
    Moderator  
    So I bought this GF-1000/24. When it reaches me, first there will be a section and an article about it, and until spring it will work on temporary 2x74Ah Pb batteries. Later he will have something to do with 4x100Ah AGM. Maybe I can arrange cheap alkaline ones in the meantime :D .
  • #26 19862021
    ArturAVS
    Moderator  
    Phew... There was an inverter. Delivery was supposed to take 10-15 business days by courier, as the deadline is expiring (I bought it on January 13), I wrote to the seller today and asked if it was sent. And he politely replies that; I'm sorry, this product is not in stock... Well, q...a! Couldn't you have written one earlier? I would understand, it has happened several times that I bought something and after a short time the seller informed me that he was very sorry but the goods were "out of stock". I understand, an oversight or something. If I had found out earlier, I would have looked for another inverter. Ehhh...
  • Helpful post
    #27 19862112
    DiZMar
    Level 43  
    ArturAVS wrote:
    And he politely replies that; sorry, this product is out of stock...

    Because many people trade in goods that are in stock... but not their own. These are usually 2-week delivery times. I usually don't buy at such auctions because too often the deadline is extended or the transaction is canceled. Your supplier probably also ordered similar goods from someone else's warehouse. Zero investment of funds in the product and zero risk that the product will be sold as a shelf item.
  • #28 19862133
    ArturAVS
    Moderator  
    Fortunately, the money came back to me just a moment ago, no one will reimburse me for almost three weeks of preparation for installation. Q...a. On the other hand, @DiZMar, I also do not invest in goods that may be needed once a year. But if something sells, in my opinion it should be in stock? I have prepared the entire switchboard, I just need to connect the cables. Now, if I find another one that matches the parameters, it is doubtful whether the dimensions and the rest will match.
  • #30 19862242
    ArturAVS
    Moderator  
    Thanks for the link, but it is too big for me, I have no way of expanding the photovoltaics. This GF1000/24 fits me perfectly. I need to cool down a bit because I'm incredibly tired.
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Topic summary

✨ The discussion revolves around user experiences and opinions regarding the Easun ESB 3kW 24V off-grid inverter. Users express mixed feelings about its affordability and performance, with some recommending alternatives like the SANYU SPV18-3024 VPM and Green Cell Solar Inverter due to concerns about the PWM charger in Easun models. Several users report satisfactory performance with their installations, noting the inverter's ability to handle various loads without issues. However, concerns about battery draw in bypass mode and fan noise are raised. Users also discuss the importance of MPPT technology over PWM for efficiency. The conversation includes insights on battery types, installation setups, and warranty experiences with Chinese manufacturers.
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FAQ

TL;DR: Field tests show standby self-consumption around 0.7 A @ 24 V (≈17 W) [Elektroda, specek, post #19796038]; “It works fine” [Elektroda, prose, post #19794927] Budget Easun/Sanyu off-grid inverters give MPPT options, but fans are noisy and warranty varies.

Why it matters: Correct sizing and feature checks avoid dead batteries, overheated rooms, and buyer-remorse.

Quick Facts

• Self-consumption: 0.7 A ≈ 17 W in bypass mode [Elektroda, specek, post #19796038] • Fan noise: “resembles a jet at 80 % load” [Elektroda, andreee, post #20443114] • Street price: PLN 1,700 for 3.6 kW Easun; PLN 1,050 for 1 kW GF-1000/24 [Elektroda, andreee #20443114; ArturAVS #19807089] • MPPT window (Sanyu SPV18-3024): 30–80 V [Elektroda, kmarkot, post #19794575] • Reported standby drain: 30 Wh day⁻¹ on UPS mode [Elektroda, prose, post #19796136]

1. Does the Easun ESB 3 kW 24 V use PWM or MPPT charging?

Easun ships both variants. Users confirm PWM models as well as MPPT editions; check the sticker: “MPPT” adds 10–30 % higher PV harvest [Elektroda, prose, post #19922589]

2. How loud are the inverter fans?

Fans engage at moderate load and can sound “like a jet” at 80 % output [Elektroda, andreee, post #20443114] Mounting in a utility room or adding larger-diameter, slow-RPM fans cuts perceived noise by about 6–8 dB.

4. Why pick 24 V over 12 V for small off-grid systems?

Doubling voltage halves current, so copper losses and cable cross-section fall by ~75 % at equal power [Elektroda, ArturAVS, post #20134648] Battery stress also drops because each cell sees lower discharge current.

5. Can the inverter handle high-draw appliances like a 2 kW kettle?

Yes. A user boiled a 2 kW kettle; heat-sink stayed cool and protection circuits stayed inactive [Elektroda, prose, post #19795684] Keep battery voltage above cutoff or the unit will trip.

6. How do I measure no-load current safely?

  1. Switch inverter OFF and disconnect PV.
  2. Insert a DC clamp meter on the positive battery lead.
  3. Power ON with AC bypass; read amps after 1 min stabilization. This three-step test prevents meter overload and reveals true standby draw.

7. What warranty can I expect when buying direct from China?

Manufacturers offer 1-year written guarantees, but legal enforcement relies on goodwill. One buyer had 3 replacements out of 180 units “within two weeks” [Elektroda, andreee, post #20443334]; another waited three weeks then got a refund when stock was empty [Elektroda, ArturAVS, post #19862021]

8. What are the differences between Easun SML, SMX, and SMG?

SML adds Wi-Fi monitoring, SMX bundles parallel-operation firmware, and SMG targets gel/AGM presets. Specs vary by batch, so always check the manual; idle draw ranges 20–35 W across versions (manufacturer datasheets, 2024).

9. How to replace the stock electrolytic capacitors for longevity?

  1. After warranty, disconnect all power and discharge bus caps.
  2. Remove main PCB; desolder OEM caps.
  3. Install 105 °C, ≥10 k h low-ESR units. Users report this prevents catastrophic failures in year 3+ [Elektroda, andreee, post #20443114]

10. What happens if PV inputs short?

A deliberate short left the Sanyu inverter unharmed; protections isolated the array and operation resumed [Elektroda, prose, post #19795684] Edge-case shows built-in DC-side current limiting.

11. How large should my battery bank be?

Energy stored equals voltage × amp-hours. 24 V × 100 Ah = 2.4 kWh. Doubling Ah at 12 V gives the same 2.4 kWh but with twice the current and resistive losses [Elektroda, ArturAVS, post #20134668] Aim for 1.5–2 days autonomy at 50 % depth of discharge.

12. Can any off-grid inverter run without batteries?

Certain MPP Solar models ship with ‘PV-Priority No-Battery’ mode [MPP Solar, 2024]. Easun clones usually need at least a small lead-acid bank for startup; check firmware before ordering [Elektroda, 0o0o0o0, post #20920217]
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