diy solar

diy solar

Recent content by 2Big2B

  1. 2Big2B

    Renogy DC-DC charger with MPPT

    Wow! What a great way to make fire out in the wilderness when you are out of matches ! 😮
  2. 2Big2B

    Renogy DC-DC charger with MPPT

  3. 2Big2B

    Renogy DC-DC charger with MPPT

    So, will I want to put all 3 panels in series, or is there any advantage running 2 in parallel, then in series with the third? No doubt you have a name for that, like 2P1S or something...?
  4. 2Big2B

    Renogy DC-DC charger with MPPT

    That is so cool! Sounds like I did good! It sounds sort of like a high frequency inverter works, no? I have some studying to do on all of this now, to try to better understand all of this and cut through some cobwebs.... Watts/Volts = Amps... Amps x Volts =Watts ... Sticking with a simple...
  5. 2Big2B

    Renogy DC-DC charger with MPPT

    Aha! I just figured it out. My order was actually the one you suggested: Victron Energy SmartSolar Bluetooth MPPT Charge Controller, Every Size Available $89.25Unit price $89.25 Item number: 324948358287 SCC110020160R ⋅ SmartSolar 100/20 12V-48V Sorry about that...
  6. 2Big2B

    Renogy DC-DC charger with MPPT

    Geeze, you are right. I don't know where I picked that up - maybe it was some youtube I watched. In see the 12/24/48 label in my minds eye from something I saw... Not that I would ever need to run a 48v system or load ports really. I just want simple, but robust. Victron, Samlex ... they seem...
  7. 2Big2B

    Renogy DC-DC charger with MPPT

    Actually, if I were to be a Pollyanna', I think the correct equation would be: For every 130W of panels, you'll need 130W/28.8V = 4.5A 4.5A of MPPT output per 130W of panels is ... I haven't a clue ... so a 15A will probably work over 400W, I guess. (what's a mppt... :unsure: ) I am...
  8. 2Big2B

    Renogy DC-DC charger with MPPT

    I don't mind spending a couple of more bucks and oversize up a step. I think Will would agree that bigger in this case is better; for a safety margin and later expansion options, like adding another panel. This one runs 12/24/48 too, so it is a step above that 100/20 that you like, and Victron...
  9. 2Big2B

    Renogy DC-DC charger with MPPT

    So what is the minimum Victron SmartSolar model that I can use? 75/15, 100/15, or 100/30? Well, I decided to go with this one. I probably can't go wrong it... Right? Or, for less value @ Amazon, but why would I ?:
  10. 2Big2B

    Renogy DC-DC charger with MPPT

    Done. Trigger pulled on the 3 flex panels and 100/20 open box Victron as you recommended! Thank you. That, with my three 24v 100ah battery packs and Samlex 600 & 1500 inverters, and a bottle of something 90 Proof, I think I might survive a rough hurricane season! 😊 ======================...
  11. 2Big2B

    Renogy DC-DC charger with MPPT

    Now looking at youtube reviews on those panels. Maybe not so bad! I think I should pull the trigger on this deal. I don't think it gets much better... Agree, or shall I keep studying it?
  12. 2Big2B

    Renogy DC-DC charger with MPPT

    ============================= Specs: "ECO-WORTHY 200 Watt Bifacial Solar Panel Mono PV 12V" Brand JJN Material Monocrystalline Silicon Product Dimensions 30.3"L x 1.4"W x 53.7"H Item Weight 25 Pounds Efficiency 200W ================================== I could probably handle a...
  13. 2Big2B

    Renogy DC-DC charger with MPPT

    I was contemplating a sale on an ebay listing "ECO-WORTHY 200 Watt Bifacial Solar Panel Mono PV 12V" for $108, or two for $200 after applying their additional 20% HotDeals discount. It is enticing. Amazon shows what seems to be the same 2 pack "item, same vendor for $310 - $20 coupon. Too bad...
  14. 2Big2B

    Renogy DC-DC charger with MPPT

    You have given me real food for thought. Thank you. I can confirm that my back patio door faces south, which is ideal. Hence I could hang a couple of panels there. As for building a frame for flex panels: what if I just glued them over a sheet of styrofoam insulation? Lightweight, cheap, easy...
  15. 2Big2B

    Renogy DC-DC charger with MPPT

    Thank you. That really heIps!
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