diy solar

diy solar

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  • Post in thread: 40ft RV want to go off grid if possible needing advice on sizing the system

    how did you locate the roof trusses? I'm thinking either that or getting 80+ inch panels and just mounting all across the RV into the metal side walls.
  • Post in thread: Using rv converter with new lithium batteries

    at what state of charge? What batteries? I got roughly 350Ah. The only time I see mine going to 14.4V is when I completely disconnect the 12V side and connect it to a severely discharged battery. As long the DC side is connected I even when the battery is at 11.xx V it never triggers the jump...
  • Post in thread: 60a DC-DC Charger only pulling about 40a

    I might have described that incomplete. I haven't concluded that it is the alternator. Just there is something in the chain which limits charging, even without a DC-DC in place - you would think that a direct connection will pull full available capacity from the alternator (180A in my truck)...
  • Post in thread: Vertical mounted bi-facial panel question

    those are all valid concerns and since this a new application and tech shall be addressed. Total racking cost should be cheaper, Wiring cost ? we don't know, Where do you put the inverters? Do you go directly to batteries ? In some areas - you do not have the space to put a perfectly angled...
  • Post in thread: Solar Cargo Trailer Built - System Check Please

    Got the Signature Solar Components ordered. Free shipping end of year sale, yeah :) Next steps: 1. Going to my local solar warehouse and getting some good deal surplus panels. 2. Buying a trailer to house all the components, and my moving goods. 3. Designing a tilt system, either for the...
  • Post in thread: EV Range Extenders COOL but is anyone selling these in the US

    I hate generator noise like every other sane person :P But I see the advantage of having a generator which charges DC directly - to keep the charging time at a minimum. I've got 7.5kwh battery bank in my RV. (900W solar) but there are occasional days where there is no Sunshine and I run those...
  • Post in thread: 12v mini air conditioner?

    I agree with this statement, just not on your initial generalization. Low profile doesn't mean noisy in general, and high profile doesn't mean silent in general. It's always up to the induvial model.
  • Post in thread: 24 VDC and 12 VDC brakes in Fifth Wheel

    First: all the break power is coming from the Truck for normal operations. If this is not the case - then something is incorrect wired at your trailer. The only time you use the trailer battery is when the fail safe switch is triggered. So basically when you loose the trailer of the hitch...
  • Post in thread: Positive terminal getting a little crowded. Time for a Bus Bar?

    so even when you got 2000W inverter -you are not using more then 100A to feed the 1000W microwave. My point is - that for the money you spend on a 12V 2000W inverter - you can buy a 24V 3000W and the 24V is smaller. I know converting an existing system from 12V to 24v is expensive. But going...
  • Post in thread: Why hybrid solar air conditioners but not the 48vdc ones?

    Pretty simple, just have a step up transformer and then rectify. That's the beauty about AC just changing voltage is super easy. Takes a solid hunk of copper and metal but is cheap. At least my mini split has a transformer not sure what is does or which voltage but it's there.
  • Post in thread: ISS Solar Panels

    floating ground is fine when you don't have anything else which you could accidental touch. So just don't try fishing for other satellites or space stations when you are up there :)
  • Post in thread: Van - 12v, 14kwh lifepo4. Help needed for diagram review.

    It's a question of usecase. I got 200W on my Van and that is plenty. I could fit 800w - but after 5 years I figured out - I move around every 2-3 days. So having a heavy duty alternator charging setup is far more valuable for me. Everyone is different - but all the power I need, I get...
  • Post in thread: Server Rack - using internal busbar for multiple inverters

    thanks, that's not something I want to do. Any downsides you see with my configuration?
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