Recent content by Bud Martin

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/