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diy solar

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  1. Electrobob

    My solar hobby after 1 year… and many thanks.

    So it has been a little over a year since I saw some YT videos about diy solar generators and decided to build one myself, not knowing anything about it. I began with a hand truck system and two 100ah 12v batteries. I bought 2 more later for more power and having 4 batteries felt the need to...
  2. Electrobob

    Solar panel angle optimizers!

    I used .5 inch PVC pipe to make simple support stands for my pv panels. I calculated the optimum angle for my latitude using one of the online calculators for that and just measured out the length of pipe needed to achieve the angle. My panels are not permanently mounted anywhere, I just put...
  3. Electrobob

    24 cell Headway battery

    Bought 24 of the 38150 lifepo4 Headway cells from battery hookup and the pre made cell holder with busbars and put them together as battery. They were sold separately at the time I bought but I can see it is now available as a pre-built kit. So this is 12v 48ah 614wh. Here is a photo of it...
  4. Electrobob

    Pre charging capacitors in all-in-one inverters.

    I have a couple Growatt 3000 24v Solar inverters and when I need to change out batteries or connect batteries to them after being disconnected I want to avoid the spark during the final connection. I have tried attaching a Brightstar 50 watt 6 ohm resistor between the last cable end and battery...
  5. Electrobob

    Upgraded the batteries on my solar generator

    I wanted longer run time from my solar generator so I swapped out the four 12v 100 ah batteries for two 24v 200ah batteries which doubled the capacity. According to the Ampere Time website and literature that came with the batteries these are 5120 watt hour batteries, but the math says 4800 so...
  6. Electrobob

    Free AC from the sun!

    I live in AZ so no talk of off grid or prepping can be complete without addressing the problem of air conditioning, which, unfortunately, is a power hungry topic. With a whole home system or large backyard array this isn’t much of an issue, but that isn’t what I have. I was only able to afford a...
  7. Electrobob

    Upgraded my mobile solar generator!

    I first made a mobile hand truck system with two 100 amp hr lifepo4 batteries. It was great but I wanted more power, so I got 2 more batteries and converted the whole thing to a garden cart format. The batteries are wired in series parallel so it is 200 amps at 24 volts. I live about 13 miles...
  8. Electrobob

    Battery charging confusion

    I have two SOK 100 amp 12 volts wired in series and a Growatt 3000TL LVM being charged with 4 HQST 100 watt panels also wired in series. This little system is a portable hand truck solar generator. I am having no issue with charging up either from pv or ac and then powering whatever I want...
  9. Electrobob

    Growatt SP 3000TL LVM manual question

    On pages 20 - 22 of the Growatt 3000TL LVM manual there are images of what the lcd screen will display. On page 22, the very last screen is supposed to be a battery SOC with an actual digital readout, not just bars of charge on a little battery icon. I have attached a shot of this page showing...
  10. Electrobob

    Growatt 3000 panel readout - accuracy issues?

    I have a Growatt 3000 24v unit. I have it connected to 4 HQST panels each is 100w, 5a, 20v. They are wired in series to the Growatt. I expected to see 100w, 80v & 5a approx. under full sun. The panel is showing 217w, 8a & 65v. How can this be? Also, the battery SOC indicator seems nearly...
  11. Electrobob

    Battery charger for lifepo batteries before series wiring.

    I have 2 12v 100 amp SOK lifepo batteries that I want to charge up separately to 100% before wiring together in series. I don’t have a battery charger though and I have looked at many battery chargers. There are a ton of cheap Amazon chargers, all seem meant for lead acid and mostly made by...
  12. Electrobob

    Growatt SPF 3000TL LVM - connecting to AC

    I have installed a male prong on the AC input and wanted to turn on the Growatt and run through some screens to familiarize myself a little before connecting batteries and pv. I plugged it in and turned it on and it won’t turn on. Do I need to have the batteries and panels connected first? I...
  13. Electrobob

    Components needed?

    Hello everyone, I am new to the forum and new to solar so my question will be commensurate with my experience. I am building a 24 volt hand truck solar generator. I have a Growatt SPF 3000TL LVM, 4 HQST 100 watt panels which I will wire in series, 2 12v SOK 100ah 1200wh batteries which will be...
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