Second Life Storage & Solar forum

Most will remember a guy that connected 100 car batteries. Now he connected FOURHOUNDRED of them..... View: https://www.youtube.com/watch?v=OC7sNfNuTNU&t=1120s I wonder how big the spark is going to be when he would connect my 500 lifepo4 280Ah cells....

I have over 800kg of Unprocessed Laptop packs for Sale located south of Brisbane Australia. Its time to admit that I am never going to process them and they have to go. I am seeking 50 cents AUD per kilo for them but if you take the lot I am negotiable. PM me for my phone number and I am happy to discuss

So i haved been running a leaf battery with dala battery managment for some years now and all is well well the tesla i have want to join in and the is the premese , i would like to keep the tesla battery in the car as i use it (its a car ) but would like to be able to power the house from this now if i get a high power DC cable which i can get that would expose the 400 v from model 3 to the system into the invertor (fox H3.7) like with the leaf Now from my understanding if in camp mode... Read more

Just watched this youtube about using second hand EV batteries 'as is' to create large scale storage systems for grid support. View: https://youtu.be/gKSmIqGvZR4 Many have us done at the cell level and some a couple of EV level but using software to integrate different, used, EV batteries at mass scale seem perfectly reasonable as a next step. @Dala already has his 1st EV -... Read more

Recently I bought this solar charger on Aliexpress, it has RS485 - I have been playing around with the RS485 port and with som help from the nice people in China i'm now able to get some data Anyone here have experience with this charger?

Hi everyone, I will share my experience with these new HV hybrid inverters and EV batteries working together as energy storage systems in this thread. I've been planning to build a small PV system for a long time. A hybrid system with a big battery I was looking for used EV batteries for some time and had a chance to get a battery from a Chevy Volt, the year 2013. My first plan was to use a 48V hybrid inverter, but a Chevy battery's reconfiguration is not an easy task. So I've decided to... Read more

Hello everyone, I have connected a GoodWe GW3600-BH with Nissan leaf battery 40kWh, with a lilygo for can communication. With the information from Yasko and Dala. I now have the problem that the inverter remains in waiting mode. Does anyone know what could be the cause of this? Thanks in advance for the info

I'll use this place to document my build... It's gonna be a long, slow project, but I'm excited and enjoy the research, design & DIY that is going into it. I have a small second house in the Japanese countryside; eventually I may retire there. The motivation for the project is to be completely off-grid with no bills. (other than property tax and maintenance.) I've already cut off the electrical service, and am running on 2 solar panels, 2500w inverter, victron 100/20 MPPT, 4 agm... Read more

I guess I should document this somewhere. I started off many years ago with 4no 80 watt panels, which cost me 1000. Back in 2002, that was a really good price. Now I can get 250 watts for 110. How things have changed! So from my 320 watt system, to the 3KW solar PV I now have,plus an 8KW wood burner and a 30 tube, 300 litre solar thermal water heater. I did mess about with a small 3KW air source heat pump, but it was as near as useless in winter, as itkept... Read more

Edit: Updated 3/9/2026 - reduced price. I have a bulk lot of 225 Nissan Leaf Modules for sale. $8500 $4500 total and I will chuck in a Batrium Core BMS with K9 and expansion board and a stack of copper bus bar. NSW Central Coast. These modules are all from 2011 Nissan Leaf Cars - sourced mostly from Australia and some from China. I have had a working powerwall for over 4 years using about 2/3's of these - and had plans to make it bigger but dont have the time. Suit someone wanting... Read more

Updated Jan 2026.... Living off-grid can bring to mind moving to the country... but the 'country' has it challenges so why not transform my city home to be off-grid capable? Water via rain-harvest (20,000g/year), Solar power to run a 100% electrified home (15,000kwh/year). Wood based heat (unfortunately) is not an easy option - and winter months are not enough power - not sure how to overcome this yet. The Solar power design goal is to consume all that is produced. Its an ongoing... Read more

Hi I am newhere, but I have been following HBPowerwall for a long time now, and this is my best chance to get an anwser. I live in Denmark, and I have bought a MPP Solar inverter on eBay. It has been working for half a year without any problems. But after a long winter where it has been shut off, I wanted to turn it back on. But this results in an "error code 90" the funny thing is, that this error code is not described in the manual, so what shall I do now. I wouldappreciate if some one... Read more