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I ordered 4 of them. I saw the reviews on YouTube so I decide to check out the website, Calpha.com. I put one in the cart but did not check out, I also signed up to see if they have any deal for first time buyer, about an hour later I got and Email offering me $50 off for first order which I...

So I decided to take a chance on Battero Tech BT280 3.2V 280Ah LiFePO4 Cells for US$55/cell shipped from China. I place an order on Nov 22 2023, received them (4 cells) on Dec 31 2023. Top balance and ran the test as a 12.8V pack, I get 293Ah from it and have it installed in my system since...

It is only allowed to pull 15A max from the panels it is not going to pull more than that from the panels by design, so to get max power you need to try to get close to 15A limit and increase the Vmp Voltage but not exceeding the max Voc PV input Voltage of Eco.

You need to drive SPDT (Single Pole Double Throw) relay. Pin #30 the Common pin Pin #87A is the NC (Normally Closed) contact Pin #87 is NO (Normally Open) contact.

Can you show us the pictures of your setup? Are you using Solar charge controller? BTW, the green speckles you see are from copper due to oxidation. https://www.corrosionpedia.com/definition/1258/oxidized-copper#:~:text=Oxidized%20copper%20is%20a%20specific,patina%20that%20forms%20over%20time.

So how much power will the portion of the house be drawing? Any load with high in-rush current, I.E. fridge, pump, A/C, etc?

So you have 12V SLA 95Ah battery. How much power does the automatic door use and how often is it activated? It sounds like you are using more power from the battery than you are putting in or battery is dying or not properly charged.

OP lives on Borneo island in South East Asia. OP should at least use tinned wires and terminals and better crimping. Copper and Aluminium do not act well together

From Victron BP user manual:

It's good to know that 18650 is taking care of the issue.

What is the surge current the fridge? What is the power input rating of the microwave?

So what are the Voltage reading of each battery cell?

SB connector series: https://www.andersonpower.com/us/en/resources/SBseriesResourcesPage.html SBS connector series: https://www.andersonpower.com/us/en/resources/SBSseriesResourcesPage.html

The inverter you are using has floated Neutral. Make and model of the inverter? Does the user manual indicate that you can tie Neutral to Ground without damaging the inverter?

Typical is 10 ~ 15. BTW, I made typo. 300W/130V = 2.3A, 130V/2.3A = 56 Ohms hot R, 56 Ohms/10 = 5.6 Ohms (3.73 ohms if 15 is used). https://www.edn.com/hot-resistance-versus-cold-resistance/

Great. Did you recheck all the connections on each cell? Do you have Volt meter to verify the Voltage readings. If all the above are OK, I would swap the cell locations to see if the readings will follow or not.

Did you do top balance before putting the pack to work? https://diysolarforum.com/resources/top-balancing-lifepo4-cells-using-a-low-cost-benchtop-power-supply.65/

Correction: BTW, I made typo. 300W/130V = 2.3A, 130V/2.3A = 56 Ohms, 56 Ohms/10 = 5.6 Ohms (3.73 Ohms if 15 is used). 300W 130V incandescent lamp will have hot resistance of around 300W/130V = 2.30 Ohms, the cold resistance will be about 2.30/15 = 0.15 Ohms, you can verify that by using your...

The wire insulation has break down Voltage that it has to handle, the Ampacity rating of the wire is affected by the temperature rating of the type of insulator, the cross-section of the conductor, and the type of conductor.

30V is the wire insulation rating, the wire for 230V system should be rated at around 600V and made for direct bury in the ground or conduit should be used, and it should be powered by the power source with RCD (Residual Current Device). You may want to consult an electrician. BTW, you cannot...

It weights over 400 lbs! it uses AGM 48V 100Ah batteries, 4800Wh so it is usable to about 2400Ah. Battery Type: AGM Sealed Lead Acid Capacity: 48V 100Ah (4800Wh) Self-discharge: Recommend to recharge every 4 months...

Make sure to disconnect the panels first before disconnecting the battery unless you are doing that at night time.

OP: do you have the name of the company that made these 18650 LiFePO4 cells? A123? 92 cells, that is a lot of cells.

So what is the make and model of this battery?

12 Awg CCA (Copper Clad Aluminium) wire has less Ampacity than the same gauge pure copper wire, 12 Awg CCA is rated at 15A. You do not have pure copper wires?

Great news! looking forward to the improvement of what SS is selling.

So OP is now the Moderator of this forum. https://diysolarforum.com/threads/signature-solar-last-word.62212/#post-774844

I replaced thousand of lytics caps in TV power supplies, PC power supplies, monitor power supplies when I was working as volunteer for the electronics recycle place for over 25 years. You can also look up 'capacitor plague'. I replaced the bad caps with good quality PANASONIC Low ESR caps used...

LOL! not just crazy spec but also price crazy too. You can get another 600W kit for $283 at their store. I do not think the seller knows what she/he is selling. Look at what other stuff they sell at their store: DHHZRKJ store: https://www.amazon.com/s?k=DHHZRKJ&ref=bl_dp_s_web_0 Just another scam.

Thanks! i hope mine will keep on working for now.

Can you please give me the model number? I bought a used High frequency PWRI200012120S 2000W 12V a few months ago, it is still working but I just want to have info about it incase it fails in the future. Thanks.

So the poor sap still insisting on buying the cheap system after doing the research about the good and the bad of what the sap wants to buy then blame everyone else when it does not meet expectation and bad customer service, LOL!

Where is PV2 of 0.27kW coming from? There are two PV's?

You will be fine. So are you going to wire up the panels into 2 series strings, each string per MPPT input?

I just got a 12V 80W radiator fan and small 100W panel that to play with and it is running great. I plan to use it in my attic this summer, I will get PWM dc the motor speed control next.