Search results

Does anyone know if the cheapest (Voltronic Axpert MKS) clones by EASUN, Y&h etc have global MPPT? I'm talking about the SMH-ii series mostly, but if anyone has knowledge of other cheap AIOs that do please let me know. Sadly, manufacturer specs are worse than useless. They are often wrong. For...

Imagine, you're getting solar panels delivered and...

I have a warehouse tent I plan to convert to a lightweight building. The frame is 50mm/2in galvanised pipe (2mm/0.080in) thick. It is definitely not strong enough to handle any serious snow load. But snow simply slid down the roof. I initially planned corrugated steel so snow would continue to...

I happen to have an EASUN SMH-ii-7K inverter and another similar 4.2KW inverter I'm not sure the brand or type of. The smaller unit has grid tie and battery-less capability, but no parallell function. The larger unit has no battery-less (despite it being in the product description), no grid-tie...

As in the subject. Supposedly all my inverters (Deye Sun-3k-g, EASUN SMH-ii 7k, MPP 4.2 kw hybrid inverter) as well as all my Heltec black(rebadged JK) BMSes support RS-485 (modbus?). There are various open source projects that talk to these devices when connected point to point (between a...

I have a rather small house (even for European standards - 95m2) that is being heated in winter by low temp hydronic underfloor system powered by a wood pellet burner. I'm happy how it works in winter and the cost to heat is reasonable as the house is well insulated. Depending on how cold or...

This is a followup to my other thread about a "cheapest battery available on Aliexpress". The dispute has ended. I've got my money back and I returned the battery to the seller(even though he didn't want it). I'm starting a new thread, because here I'd like to focus on evidence, pictures etc...

Has anyone got a solution for how to build a neat looking system that includes let's say a raspberry pi (or equivalent small computer), 8 or so ADC channels for measuring DC voltages/currents with hall effect sensors, some outputs to drive SCRs and relays etc and make it enclosed to be wall...

Being in a process of installing two of my first AIOs and considering which loads are critical and which aren't I wonder. Is there anyone here, who has been consistently using their cheap Chinese AIOs by EASUN, MPP, (SRNE or clones) close to its rated power for prolonged periods of time? My...

I've had some quotes for bifacial panels on Alibaba and I have to say, the prices are much better than what is available locally here in Europe(Poland). Also, fun fact, shipping a pallet of large panels by sea from Shanghai to Gdansk is actually much cheaper than having a truck deliver the same...

What do you think about putting some polyurethane building foam around your battery pack if you're using a toolbox for a case and you want to immobilise the pack? (pictured) I also have compression with threaded rods (spring loaded) and I've used this yellow foil (two layers) so I can pull...

So I've found myself in unexpected possession of some more or less bloated cells. As I'm going through with discussion to get my money back I'm also wondering if, with some acceptance of risk, these can be used, but also I'm interested in the topic in general. I think quite a few people have...

I've got few catl cells that Im trying to assess quality off, but I'm having trouble decoding their numbers attached. Can anyone help please? I doubt they traveled from the future year 2029, also they measure surprisingly good internal resistance (ac so far) to be 4 years old.. I found the...

So I got the cheapest 24V 100AH battery on Aliexpress that is in stock in Europe to make a small secondary system(replacing lead). Sadly I discovered a video by a Russian guy who bought a 600wh power station from the same brand and discovered it is actually 300wh. So I didn't have high hopes...

I've been looking for a suitable DC circuit breaker for 400A 60V (for my 48 16S 280AH LFP battery) and I'm having a hard time finding a suitable one at a reasonable price in Europe (Poland, but the market for electrical parts is very similar in most of the EU). What is reasonable for me...

I've read this new (20230 study about desulfating flooded lead acid batteries with just high voltage DC charge. It is very interesting as they tested just overvoltage on desulfating flooded lead acid. Many a company sells pulse desulfators, but if all we need is a bench power supply - that would...

Does anyone have a good stress test procedure to ensure the quality of the equipment after buying? When I was buying a tiny 1KW aio for a friend I was very glad I decided to do all the testing on the bench (including 800W heater as load) when the AC charger decided to self destruct. We...

I've seen a bunch of videos online and read all I could find about cell compression/fixturing and I'm leaning towards doing it. However, I recently saw a datasheet (from this forum) for my cells from Higee Zuhai(b) plant and there is no mention of fixturing and complression at all in it. Cells...

I'm not sure if this should go into AIO forum of off-grid forum, but I'm leaning towards AIO as this inverter has grid support, grid charging etc. I'm talking about ESUN smh-ii-7k and MPS-VIII ECO 4.2KW (very similar devices) and other similar ones I never saw anything about it in the...

I'm building my first lifepo battery using 16x 280ah prismatic cells. I haven't yet decided if I put the battery in an insulated, but mostly unheated workshop, or in a basement beneath. I'm going to use a heltec 8s-20s ht820s2a 150 (200A rated, 350A max, 1~2a equalisation) BMS. 120 sq mm...

I'm in the equipment evaluation phase of building an emergency power backup system for my (small) house. So far I'm planning 5kWh (later 10kWh) of lfp battery storage and a Chinese hybrid inverter (smh ii 7kv) as a UPS. I also plan to plug my existing 2.4kW od grid tie solar to it in case of...

Hi, I'm new on this forum, but I was lurking for a long time. What made me register today is I would like to aks if anyone has any experiences with solar equipment aliexpress sellers specifically in context of European shipping. I'm explaining why below. In general Aliexpress feedback system...