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  1. S

    Over 5 inches of rain in 28 hours - worst solar day ever.

    Your Onans are 1800 rpm dual-pole aren't they? I have an Onan 6.5 1800 rpm on my motorhome and it's way quieter than the 3600 rpm ones, not anywhere near as obnoxious as this Honda at my parents place...
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    Over 5 inches of rain in 28 hours - worst solar day ever.

    Yeah they definitely do have a 6.5 kW Honda generator wired into a dedicated critical loads panel and have a manual transfer switch for now (dual breakers in aux panel with joining bar). The good thing is they built the house to start with 20 years ago with a critical loads panel for generator...
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    Over 5 inches of rain in 28 hours - worst solar day ever.

    Yeah wow, sounds like here now. I'm visiting my mother in the PNW Washington for a couple weeks and they're getting hit bad right now with record rainfalls... https://www.washingtonpost.com/weather/2021/01/12/atmospheric-river-pacific-northwest/ She was asking me about some solar options for...
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    100% off-grid system from the ground up, literally.

    Not really any progress lately, for the holiday had to go run to Michigan and helping a family member install a Mr Cool 4-zone HVAC at his house as it's too cold here. So my life as a solar enthusiast is like on total hold right now, I'm more like a wannabe HVAC guy for the last couple weeks...
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    My next inverter! (Sol-Ark)

    They gave us 10% discount for having an order of 20 or something like that... (I think we filled our first 10 and committed to another 10 on next order which may have already completed now).
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    300 V/100 amp, volt, current, watt meter question.

    It's all great bro, we're in this together hehe I have my silly moments too... :geek: I had one recently where I thought I was buying a 48v > 12v DC-DC converter (hey that's what I thought the pic was of), but when I got it, it was just a little tiny IC chip! It does look in the pic like it...
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    Controller for 175W panel to 200Ah LiFePo4 battery

    Cool, yeah it looks like you can also get the BT-2 bluetooth module for it and get some advanced app management functions as well...
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    Controller for 175W panel to 200Ah LiFePo4 battery

    More info: https://www.renogy.com/content/Manual/DCC50S%20DC-DC%20MPPT%20Manual.pdf
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    Controller for 175W panel to 200Ah LiFePo4 battery

    Perhaps you should look into that DC-DC (with MPPT) charger that Renogy offers, since it can do both charge from alternator and from solar: https://www.renogy.com/dcc50s-12v-50a-dc-dc-on-board-battery-charger-with-mppt/ It is safer to charge lithium (via alternator) using a DC-DC charger...
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    300 V/100 amp, volt, current, watt meter question.

    It is just the measured resistance, in ohms, on the load side:
  11. S

    400 watt HQST Solar Panels Actually Output 400 watts!

    Is that 400w SLC or NOCT? (Assuming SLC)...
  12. S

    Controller for 175W panel to 200Ah LiFePo4 battery

    Is that the highest wattage panel you could find for the size? What are the specs on your panel (Voc and Isc)?
  13. S

    Winston DIY LiFePO4 battery not charging from Votronic VCC 1212-90 battery to battery charger??

    That's why if it were me, I'd plug on a standalone voltmeter and amp probe onto the battery leads and try to watch real numbers as I was playing with the chargers. Also to isolate, I would disconnect the adjacent charger while I was testing with one of each charger just to rule it out of the...
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    charge controller size

    Yeah, and just to clarify, with 2 panels, you would want to wire them in series, not parallel, you will have better results, as it ensures your PV voltage is well above battery voltage, so the MPPT has plenty of wiggle room to control the battery charging.
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    Winston DIY LiFePO4 battery not charging from Votronic VCC 1212-90 battery to battery charger??

    It's possible, did you read this manual for it? https://123electric.de/img/cms/123SmartBMS_gen3_manual.pdf I see several settings in there which could lead to the BMS disconnecting. Do you also have a voltmeter and amp probe for side monitoring while you're troubleshooting what is going on?
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    charge controller size

    Before you purchase a charge controller you need to understand what max PV input voltage is and why it matters in selection of an MPPT SCC... You will need to know: -How many panels you have -What is the Voc and Isc of the panels -What is the coldest temperature you see in your area where the...
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    How to connect (or not connect) load in a 12 v DC circuit

    Yeah on any length of wire run, you want a fuse protection close to the power source, in case that wire shorted somewhere along it you won't have a meltdown.
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    How to connect (or not connect) load in a 12 v DC circuit

    Yeah, it doesn't matter really where you bridge them in (they're paralleled anyways), as long as the all wires are sufficient gauge to handle the amps of both the fuse block loads and charge controller loads... Make sure there is a fuse or breaker protection on the charge controller to battery...
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    LiFePO4 Battery Warmer Install

    Good to know, thanks for providing that useful info about the real world performance...
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    Cheep Midnite classic 250 from eBay not what is advertized as

    Yeah, under theoretical pretenses I decided that I didn't need or require the clustering ability of Follow Me, hopefully in a year down the road I'm not wishing I had got one with it hehe... I mainly was looking for a 48v to 12v battery charger but can't find anything aside from industrial...
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    LiFePO4 Battery Warmer Install

    Well, that heat pad is only a 150w, so far, I'm not too concerned (if it were the 500w version maybe I might)... Also the consensus from other forum members was that directly applied to a battery case could be a little hot, but mounted on the bottom-side of an aluminum plate (with aluminum...
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    Cheep Midnite classic 250 from eBay not what is advertized as

    I just bought a similar unit on eBay (from a different seller as Guda bought his): https://www.ebay.com/itm/NEW-MIDNITE-CLASSIC-250-MPPT-SOLAR-CHARGE-CONTROLLER-No-AUX-OR-Follow-Me/174471852724?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649 Technically it's not a 'lite' because...
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    LiFePO4 Battery Warmer Install

    Sure no prob at all :geek: Here are the heat pads I ordered: https://www.amazon.com/gp/product/B07GDHX2Q6/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 Here are the thermostats to go with each heat pad...
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    How to get the most out of a cheap PWM SCC

    They do make tools called tone generators which I've used before to trace wires: https://www.amazon.com/Fluke-Networks-26000900-Pro3000-Generator/dp/B000FTADX0/ref=sr_1_3?dchild=1&keywords=tone+generator&qid=1608145140&sr=8-3 However, in this case it might be easier/cheaper to see what you can...
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    LiFePO4 Battery Warmer Install

    Not quite to that point yet. I got my last 8x 280ah cells from AliExpress finally, have my aluminum plates almost ready to go, just have to drill out the holes in the end plates. Bottom plate will be supported by the threaded rods on the bottom side. Might put some angle brackets under the 4...
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    How to get the most out of a cheap PWM SCC

    Still, don't forget to fuse the PV circuit for safety... Also should fuse the battery bank circuit as well. :)
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    Epever 2-wire plug

    Is it something like this? https://www.amazon.com/uxcell-AC300V-3-81mm-Terminal-Connector/dp/B074LYZTR3/ref=sr_1_2?dchild=1&keywords=uxcell+10+Set+2-Pin+3.96mm+Pitch&qid=1608140854&s=industrial&sr=1-2-catcorr You have to check the 'pitch' which is the distance between the terminal centers to...
  28. S

    Solar controller size all over the place

    You have to look at the wattage ratings of the charge controllers, and also the max PV voltage handling as well. Battery bank voltage you plan to run at (in your case, 12v), play a role in the wattage rating as well. Here is an example from a specs chart for Victron 150/xx series controllers...
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    The next Battery that will change everything.

    Of course hydrogen will have to be refrigerated to STAY a liquid, hydrogen can stay liquid (without active refrigeration) for several days, up to a week if in an insulated vessel (if you can hold it under -423 degrees Fahrenheit with high insulation), BMW built the Hydrogen 7 prototype with the...
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    360V DC input split phase 120V/240V AC inverter

    Yeah and the other problem with that inverter is, it had relied on setting it up with SolarCity's phone app / cloud service, so when it went down (app and cloud service was deprecated), customers were told they had to connect the inverter through the Tesla app, but then you have to call Tesla to...
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    12V vs 24V.. worth it in my case?

    Welcome! Great to have you post finally :) Biggest reasons to consider upgrading from an existing 12v to a 24v system would be if you need to go with an inverter larger than around 3000w... Other advantages are cable gauge can be smaller. Main disadvantage would be you'd have to run all your...
  32. S

    Hello from South Africa

    WELCOME my friend :geek:
  33. S

    The next Battery that will change everything.

    Yeah tanks are highly insulated, it doesn't take much energy to hold the temp once it's stabilized. You could probably turn off the heat and in 2 weeks it would still be pretty hot... I know on liquid natural gas or liquid hydrogen they put it into buses with insulated tanks and it stays frozen...
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    The next Battery that will change everything.

    Yeah, I've seen several of Donald Sadoway's long talks, that is promising tech, the iron-flow and liquid-metal batteries. The only problem for nearer future I see, is they are currently geared toward large-scale energy storage (of course they have to honor where they can get research money for...
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    360V DC input split phase 120V/240V AC inverter

    So if the Delta H6 seems appealing to anyone (using the MPPT input on HV car battery), you may want to read this thread: https://teslamotorsclub.com/tmc/threads/will-solarcity-h6-work-in-a-rogue-off-grid-setup.182766/ Seems some people have had a few struggles with a sensitive AFI arc-fault...
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