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  1. Symbioquine

    How Long Can Your System "Coast"?

    We'll call the time where a system is neither all the way full nor too close to empty: "coasting" IMHO, time spent coasting is one measure of how well an off-grid system is balanced in terms of production capacity, storage capacity, and usage. Lots of ways to look at this, but; If your...
  2. Symbioquine

    Big Picture

    This is a great forum where folks seem eager to help each other and share their learnings, experiences, etc. It is awesome to see such a mix of knowledgeable folks and beginners trying to learn... However, we see the same questions (or minor variations thereof) super frequently. Often the...
  3. Symbioquine

    Living with the DuroMAX XP9000iH

    Some things I've learned about the DuroMAX XP9000iH - hopefully some of this will help other folks: Similar Generators This generator is very similar to the following generators which can be used (with a grain of salt) as a reference when looking for helpful reviews, alternate manual...
  4. Symbioquine

    Victron Multiplus Inverter Metrics

    Hi, I just wanted to share my post MultiPlus Inverter Metrics since I hope it will be useful to other folks trying to monitor their split phase / parallel / 3 phase Multiplus installations via VE.Bus/MK2/3. Please feel free to use this thread to provide feedback or discuss and ask questions...
  5. Symbioquine

    How efficient is your generator?

    I wanted to start this thread so folks have a place to compare real-world numbers about their generator efficiency. This data is from two generators which I run exclusively on propane. Up to 2022-11-10: Champion 100263 (Nominally a 3400 watt generator) After 2022-11-10: DuroMAX XP9000iH...
  6. Symbioquine

    Low temperature PV string bypass relay/switching

    I'm curious whether anyone has worked out a circuit that bypasses one of the panels in a PV string at low temperatures? It seems like such a device could be very simple and allow normal operation with larger strings than the temperature coefficient and absolute lowest expected temperature might...
  7. Symbioquine

    Help understanding aberrant LFP cell voltages at close to full SOC

    I have two (in parallel) DIY 8S LF280K batteries with Overkill BMS' that I built this fall. (Charged cells as a pack with BMS, then top-balanced individual cells to 3.645v and <0.5a.) Recently, I've been observing some interesting behavior with the cell voltages that I'm hoping someone here can...
  8. Symbioquine

    Power supply reverse shorted? It might not be toast...

    I'm guessing that many other folks - like me - have also accidentally shorted in reverse their power supplies while top balancing such that somewhere between -12v and -56v flowed through the power supply. When this happened to me, sparks flew and subsequently the power supply stopped working...
  9. Symbioquine

    Clarifying "Code of Conduct" - "Self Promotion" Clause

    Not a "complaint" exactly, but this section is the closest to a "Meta" forum section I could find... WRT: https://diysolarforum.com/threads/official-forum-code-of-conduct-and-terms-of-service.2216/ I'd like help understanding the following clause better; I read this as a injunction against...
  10. Symbioquine

    Starting a Parts Library & Using FreeCAD as a Design Tool

    Hi Folks! I've been playing with various off-grid systems for a while now, but just starting to get into building my first LiFePO4 system. With any building/design project, one thing that really helps me think through the spatial and material requirements is being able to visually assemble the...
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