NewStats: 3,263,216 , 8,179,418 topics. Date: Thursday, 05 June 2025 at 06:04 AM 75n6g

ManAdii:

It's not just the building. Cworth s are shit. I have 5 of them installed and the highest I have gotten from them at peak sun is 1.2kw out of the 1.75kw.

Even when I tested it with my multimeter before mounting it. The Isc is not up to what is on the label but the Voltage is.

Different strokes for different folks. Some other ppl av vouched for the performance. I hope ur roof inclination/distance isnt the issue here. Also the battery voltage/load cud also be the culprit here. U still getting over 68% yield which is better than many fake sticker s output.

Mrreed:
I have seen it many times. Sako 5.5kva, I used Jinko 450w x4 and the yield was below 10% till I added 2 more s.

What VOC were u getting with the initial 4 s? I usually try to get around 150v and it works well for me

Nteogwuija:


I'm facing same issue. Mine is CWorth's 350w(×3) equalling 1050w. The highest I've gotten during peak period is 535w.

I'm staying at the down floor of a 2 storey building, making it difficult and costly mounting the s on the roof. So I had to install it by the side of the building. So I'm guessing the building is affecting the PV's output.

I'm curious at how mounting it on the roof is costlier? How did you install it by the side? Metal brackets or how? U wud be getting shadows which wud limit production. The only thing expensive using the roof would be the length of wires used which in the long run wud give more efficiency than the side u used cos of the direct sun hitting it without shadows

Thanks for the heads up, I didn't see anything wrong with the connection since I'm not a technical professional.

This is a setup done by one of Deriy's customers, and after I asked one of our company's specialized technicians, he also said that there is something wrong with this connection.

He said that if you connect it this way, the first battery pack will be drained first, and the last battery pack will never be able to be drained enough to discharge the power.

I am sorry to bring you such misunderstanding, thanks for the correction!

jonescosmos:
If this is how you have been connecting the Black Stacked battery, you are doing it wrongly bro.
One of your DC cable should exit from the first battery and the second cable should exit from the last battery.

maklelemakukula:
you know their legit distributors in lagos ?

no

KaylaDeriy:
Thanks for the heads up, I didn't see anything wrong with the connection since I'm not a technical professional.

This is a setup done by one of Deriy's customers, and after I asked one of our company's specialized technicians, he also said that there is something wrong with this connection.

He said that if you connect it this way, the first battery pack will be drained first, and the last battery pack will never be able to be drained enough to discharge the power.

I am sorry to bring you such misunderstanding, thanks for the correction!

Please do you have a 10kwh Deriy LiFePo4 battery available? I sent you a Whatsapp message, no response from you. Thanks.

Mavor:
Please do you have a 10kwh Deriy LiFePo4 battery available? I sent you a Whatsapp message, no response from you. Thanks.

Drop your number. I'll send you the link to Deriy telegram for Nigeria. You can speak to their agent directly from there.

Used Renogy Charge controller.

12/24/48v

60a max.

90k

0818-242-4406

ManAdii:


Drop your number. I'll send you the link to Deriy telegram for Nigeria. You can speak to their agent directly from there.

Can you please place the telegram link here? I don't post my number publicly for privacy reasons. Thank you.

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Thanks for your waiting, responded.

Mavor:
Please do you have a 10kwh Deriy LiFePo4 battery available? I sent you a Whatsapp message, no response from you. Thanks.

KaylaDeriy:
Thanks for your waiting, responded.

Seen. Thanks.

@HeavenlyBang, Deriy don't have 10kwh. They have 7.2kwh and the next is 14.3 kwh. Please advise further. Thank you.

Hello everyone, i need recommendation on the best 10kwh lithium battery.
Also would like to know if anyone ever used Felicity warranty to be sure they offer real warranty.
Also need review on Dawnice battery, their 10years warranty appears to be marketing as they only offer real 2 years warranty

Drgreatone:

I'm curious at how mounting it on the roof is costlier? How did you install it by the side? Metal brackets or how? U wud be getting shadows which wud limit production. The only thing expensive using the roof would be the length of wires used which in the long run wud give more efficiency than the side u used cos of the direct sun hitting it without shadows

It's not just the wires. I'd have to hire metal scaffolds. Also, it's a rented apartment, and the landlord might not like the idea of having s on the roof.

As for the setup, check attached image.

As at the time I took the attached image, it was 9:51 am, clear sky. I was getting between 300 to 400w from a 1050w PV.

Mavor:
@HeavenlyBang, Deriy don't have 10kwh. They have 7.2kwh and the next is 14.3 kwh. Please advise further. Thank you.

Prices?

Nteogwuija:


It's not just the wires. I'd have to hire metal scaffolds. Also, it's a rented apartment, and the landlord might not like the idea of having s on the roof.

As for the setup, check attached image.

As at the time I took the attached image, it was 9:51 am, clear sky. I was getting between 300 to 400w from a 1050w PV.

You're getting shaded by the building tbf.

Do you still only get 300-500 by 1pm when sun is out?

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Nteogwuija:


It's not just the wires. I'd have to hire metal scaffolds. Also, it's a rented apartment, and the landlord might not like the idea of having s on the roof.

As for the setup, check attached image.

As at the time I took the attached image, it was 9:51 am, clear sky. I was getting between 300 to 400w from a 1050w PV.

Confirm your battery voltage first.

[quote author=GloryJoyeux post=134907963][/quote]

Thanks for the detailed analysis. Please where did you buy the inverter? Kindly share.

GloryJoyeux:
Hey folks,

Just wanted to drop a solid recommendation for anyone considering the new Deye 6kW hybrid inverter. I recently got my hands on one and have been running it pretty hard to see what it’s made of — and honestly, I’m impressed.

First off, it’s parallel capable up to 16 units, so scaling up is no issue. Efficiency-wise, this thing is tight — I clocked idle power draw at just 30W when running a 1.6kWh load, and it only pulled under 100W even with 4kWh flowing. I also put max sustained load of 6kw, it took it like a champ! That’s some seriously optimized idle-to-load performance.

Now, let’s talk MPPTs. The Deye has a new feature under Advanced Settings called “MPPT Multi-Point”. Game changer. One of my PV strings gets shaded after 1PM, and normally performance drops off hard. But with this setting enabled, the inverter kept pulling full amps from the unshaded s — like it knew exactly what to do. I ran the numbers — the gain was legit.

Sound-wise, it’s practically silent. It uses just one fan, which only kicks in at high loads. No annoying coil whine either — just a soft whoosh when it ramps up. I’m running 10,280W of solar into it, though it can handle up to 12,000W on dual MPPTs. It charges and discharges at 135A, and with an IP65 rating, it’s perfect for our dusty, humid conditions. Built-in WiFi made setup easy and remote monitoring is clean.

Small Catch:

Since it’s a newer model, Solar Assistant doesn’t it yet, but I checked — it logs every 60 seconds and pushes data every 5 minutes to the Deye app/web. Accuracy is within 98% of Solar Assistant’s metrics, which is impressive for a stock system.

I also tested it with both closed-loop (BMS comms) and open-loop (voltage-based) battery setups. It handled both without breaking a sweat.

Cost & Efficiency:

It set me back ₦950,000, and honestly? The performance outshines Growatt, Axpert, Sumry, Welion, SMS, Sako — pretty much every other popular Chinese inverter I’ve tested.

One thing I’ve noticed with a lot of these cheaper all-in-one units is they use low-quality conversion components. For example, an SMS inverter I tested lost a constant 4.5kWh/day due to inefficiency. Doesn’t matter if you’re generating 9kWh or 30kWh — you’re losing a minimum of 4.5kWh daily. That’s 135kWh a month gone. Discharge efficiency was also poor — I was only getting 86–89% usable energy out of a 10kWh battery.

With the Deye? I’m seeing up to 96% usable, meaning 9.6kWh out of a 10kWh pack. That’s a huge difference.

Testing Other Brands:

I also tested the true output of other inverters, and most are overrated. A “6.2kW” Sumry unit (sms, welion, sako, powrmr, anern, victor max, daxtraumn etc) barely managed 5.6kW sustained, and a “10.2kW” SMS one capped out at 8.2kW. Turns out, they rate them based on PV input, not actual AC output — which explains a lot.

My Brand Ranking (So Far):
• #1: Deye – most efficient and best built
• #2: SRNE – decent performance, but not quite Deye
• #3: Growatt – solid, but a step below SRNE
• Way down the list: Felicity Solar and similar budget brands

That said, I do have beef with SRNE’s pricing. They’re trying to off their gear as because they’re UL-listed and in the U.S. market. But their 16kWh battery is way overpriced for what you get. It’s just REPT cells rated at 8000 cycles (anyone can get their hands on this cells, and no guarantee its actually grade A sef), and nothing special inside — no thermal padding, no fire suppression, no fancy BMS features. You can get better-built packs from Deriy, Bicodi, Gospower, Lvtopsun, or Valtech for less.

Quite a long read, if you have any questions you can ask me.

Thanks for the detailed analysis. Please where did you buy the inverter? Kindly share.

HeavenlyBang:


You're getting shaded by the building tbf.

Do you still only get 300-500 by 1pm when sun is out?

I do get around 400 to 535 from around 11 to 1pm.

dollarnaira:


Confirm your battery voltage first.

It's Cworth's 12v 2.5kw

Nteogwuija:


It's Cworth's 12v 2.5kw

For a 12v system, a standalone 60a MPPT charge controller can do around 800w max, even if you have 2.5kWp of PV installed. You may have maxed out your controller's capacity.

HeavenlyBang:


Prices?

14.3 kwh - 1.9m, 7.2kwh - 1.2m

Nteogwuija:


It's Cworth's 12v 2.5kw

Display voltage or percentage

2.5kwh 24v Cworth lithium battery available now, #700,000. Call/whatsapp me on 08168986461

to experts in the house i have a couple of questions, why do most 2kva 12v hybrid inverter comes with 80amp mppt charge controller if it has a ma pv array of 2000watt i am a newbie but from my research charge controller should be sized by dividing 2000watt divided by 12v system voltage which is 167amp. just confused about this
question 2 : is there advantage to buy bigger solar like 550 watt to buy a couple of 250watt s?

Trippledots:


For a 12v system, a standalone 60a MPPT charge controller can do around 800w max, even if you have 2.5kWp of PV installed. You may have maxed out your controller's capacity.

Yes, the charge controller says it's 720w. But I haven't gotten 600w b4 with the 1020w installed.

I was thinking that oversizing the s might take me close to the 720w after factoring efficiency loss and other factors.

I'm still getting to know these solar systems well, maybe I'm failing to understand certain things

dollarnaira:


Display voltage or percentage