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  1. Riplash

    How big of an inverter for your RV, Boat, or non house powerwall--Inverter Sizing

    I am using RAKA epoxy. Their headquarters are 60 miles south of me, and a lot of companies private label their epoxy. I have used West System epoxy if I have a small project on a Sunday, and I am out of epoxy, and I don't want to wait. Since I began building the boat, my stockpile of epoxy...
  2. Riplash

    How big of an inverter for your RV, Boat, or non house powerwall--Inverter Sizing

    Prepared1, The joints in the plywood for the boat are fat finger joints. I made a router guide and then I cut them out with a router. I thought it would be easier than a conventional 8:1 scarf joint, but I can do scarf joints now really easy too. There are 2 pieces of plywood stacked in the...
  3. Riplash

    How big of an inverter for your RV, Boat, or non house powerwall--Inverter Sizing

    Thanks for the feedback about Reliable inverters not being reliable. I looked at AIMS website and they seem like a more reliable company. Most of their 2000W to 4000W low frequency inverters are sold out, unavailable at the moment or way larger than I need with lots of bells and whistles that...
  4. Riplash

    How big of an inverter for your RV, Boat, or non house powerwall--Inverter Sizing

    Hi OffGrid, thanks for the Idea. How often do you pull 3000W from your inverter when you are using your camper conversion? This is exactly what I want to do. I mainly want the inverter for when I am using the boat. If I can use it when I am building the boat, that is a bonus, and gives me...
  5. Riplash

    How big of an inverter for your RV, Boat, or non house powerwall--Inverter Sizing

    Greetings everybody. My progress on the boat is going well. I am trying to get the bottom fiberglassed, and painted soon, so I can flip it over and work on the inside. I have 2100 cells tested and probably 500 ready for testing. I don't NEED the Inverter yet, but I want to get the inverter...
  6. Riplash

    My Projects Cells- RC Planes, Portable AC inverter/batterypack, and Hybrid Boat

    Hello All, I have been really busy working on my projects, working my day job, and trying to keep up with everything--and well I can't. I have been so busy with all that stuff, that I haven't been able to watch many HBpowerwall videos, or even read the forum as much as I would like. My hats...
  7. Riplash

    Newbie needs a Mentor

    Using Lithium Ion batteries to replace a 12V lead acid battery is not just straightforward as using a 3S. Most 12V things have a high voltage limit of 14.5 to 15 volts, and a low limit of 9.5 volts or so. So with a 3S system you can charge the batteries to 12.6Volts but then you can't use all...
  8. Riplash

    Newbie needs a Mentor

    Hello Mobinik, Welcome to the forum. Like Korishan said there is a whole community of mentors. Can you tell us more about what your first or most pressing project is with lithium ion batteries? My "first" project is building a hybrid powered waterski boat, with reclaimed 18650 batteries...
  9. Riplash

    Busbar solder not sticking

    Hello Drspeakman, I think you might be overheating the copper. With soldering electric stuff, I don't get the copper that hot. When I am working on copper plumbing or copper Air conditioning things, when I was learning I would overheat the copper. I am not 100% sure, but it kind of sounds like...
  10. Riplash

    Where do you keep your batteries?

    I am not sure that insulating the concrete floor is a good idea. In the winter time heat from the ground will probably help keep the shed above freezing, and in the summer time when the Air Temp is alot higher than the ground temp an uninsulated concrete floor will probably help lower the...
  11. Riplash

    Hello from Florida

    Welcome Aaron, I am in Melbourne, FL, and I don't have a link to my project yet, but it is on my must do list. I am building a hybrid dual console/ski boat, and am planning on using my reclaimed batteries for the "house loads" as well as the motor battery bank. Korishan one of the moderators is...
  12. Riplash

    Wire for Spot Welding

    Hello Spinningmagnets, Thanks for information. I have been very busy with work and the rest of my life and stuff, and I have been so busy I haven't been able to read or comment on much stuff here. I know I missied some cool stuff on here. Let's get back to the thread topic.....I bought some24...
  13. Riplash

    Simple DIY ESP8266 BMS

    Hello CompletelyCharged, I was working on an Arduino/ESP32or 8266 based BMSin the fall, but other parts of my project got in the way, and work got real busy. I am just now revisiting the BMS design for my boat. Forgive me if I ask a question that has been answered in a another thread. 22 x ESP...
  14. Riplash

    Simple and cheap Battery Pack temperature management/monitoring

    Hello Marc, It sounds like you are thinking about using a thermal cutoff fuse. That opens the circuit when it gets too hot. I think it ispossible to run more than 1 thermal cutoff fuse to an analog port with a ladder of resistors. I think you would spend a lot of effort avoiding ground loops...
  15. Riplash

    Simple and cheap Battery Pack temperature management/monitoring

    Hello Marc, Are you familiar with Aurduinos or similiar? I have been saving a lot of the thermistors from the battery packs I take apart. Then I make a simple voltage divider using a 5kohm resistor and a 1k ohm resistor. I measure the voltage and hence the resistance of the thermistor...
  16. Riplash

    Power tool batteries

    I bought about half of them from www.18650batterystore.com. They rotate different cells through deal of the day and I waited for the cells to be on the deal of the day. I bought the other half from Liitokala on Alibaba.com. It has been about 6 months ago, because one I found this website I...
  17. Riplash

    Power tool batteries

    My guess is that you have two things working against your favor. First I imagine most of the e-bikers that buy those types of batteries are DIYers and probably want to make their own packs, and they also are the type that would source their own second hand cells and test the cells themselves...
  18. Riplash

    Switching Power Supply with wide AC Input Voltage Range

    Okay, I brought home a sample power supply that was given to me. It is a Sunsky S-720-24, and it is available direct from Sunsky and I think from Amazon or Alibaba.I haven't tested it yet, so I can't tell you how well it performs. I am looking for a 48V 1200W or 1500W powersupply myself, but I...
  19. Riplash

    Hypothetical Farm Irrigation. How impossible is this?

    I think you should also measure the amperage/power of the pump when it is running. The Nameplate on the pump is the maximum continous power the pump can output and not burn up or get damaged, but the pump is probably not drawing its max power continously. It depends on how the whole pump control...
  20. Riplash

    Switching Power Supply with wide AC Input Voltage Range

    I have had good results bysearching for LED Driver switchmode Power Supplies on Amazon, Digikey, or Mouser. Searching for LED driver narrowed the results down to what I was looking for. My notes and sample power supplies are at the shop now and I am at home but I think two of the brands I found...
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