diy solar

diy solar

Search results

  1. JBertok

    12v parallel wiring size and related questions

    Sounds like the batteries are paralleled as a bank, and the bank connects to the bus bars rather than each battery having it own cables. Cable sizing is more than X amount of current requires X gauge. There is a relationship between the conductor gauge, its length, the material it's made of...
  2. JBertok

    12v parallel wiring size and related questions

    I am not sure connecting the chassis alternator and battery to the LiPO4 batteries without some sort of regulation would be adequate. Victron makes a DC-DC charge controller just for that purpose that would help. Victron is obviously not inexpensive, but it's on a completely different level of...
  3. JBertok

    Need some guidance before I pull the trigger

    Depending on where your main service panel is, it might be most practical to install a load center next to it, pull all your branch circuits out of the main panel, and move them all to the load center. Inverter documentation will refer to that second braker panel as a "critical loads" panel...
  4. JBertok

    Feeding 48v, stepped up from 12v battery, intopower station MPPT SCC input?

    Edit: thinking about this more, you might run into a problem with MPPT, assuming the MPPT function can be disabled in favor of a hard-set voltage, where the "PV" input voltage from the DC converter might not adequate at 48V. I saw you mention the 32-95V input spec of the MPPT, but generally the...
  5. JBertok

    Feeding 48v, stepped up from 12v battery, intopower station MPPT SCC input?

    I can give you some background on the mode of operation of an MPPT. Maximum Power Point Trackers utilize the voltage vs. current output curve characteristics of the PV array to regulate their output to the battery. A PV specification label provides details from which a power output curve can be...
  6. JBertok

    1200A 12V power supply

    If those are the same ones I am thinking of, I am pretty sure they need high voltage input. The last C7000 chassis I saw running was on a 208V UPS and PDU. They will run on 240V too.
  7. JBertok

    Seeking Advice: Solar Panel Setup - Understanding Voltage Fluctuations

    First, for your observed 12.9V after sitting for a bit: All battery chemistries at rest have a relationship between "voltage" and "state of charge". Given your AGM chemistry and nominal voltage of 12, you can Google a Volts vs SoC chart. Next, recharging batteries of any chemistry is most...
  8. JBertok

    Please help me decide

    It's good practice to leave at least a 10% margin when factoring both voltage and amperage limits of the MPPT to accommodate the potential of higher than rated PV output when they are cold and/or exposed to partly cloudy skies. 2S or 3S are both be fine as long as the combined rated...
  9. JBertok

    Feeding 48v, stepped up from 12v battery, intopower station MPPT SCC input?

    Since mentioning powering a Starlink with 48V, that would be accomplished with Power over Ethernet, and presumably a DC PoE power injector. I posted a solution to powering a Starlink, or any Passive or active PoE device, safely from a 12V DC power source...
  10. JBertok

    Feeding 48v, stepped up from 12v battery, intopower station MPPT SCC input?

    For 12V DC PoE ethernet switches, check out Netonix. They make industrial and DIN mount DC-powered networking gear that has the DC-DC voltage converting built-in for both active PoE+ and 24V passive PoE. Been using their gear for many years, it's all very robust.
  11. JBertok

    No magic smoke, but no $ savings because I played with AC charging.

    A few factors to consider related to outages: - Outages are more likely during bad weather where PV isn't productive. - In an emergency, your power consumption metrics won't look like the daily usual because you'll be in an emergency conservation mindset and only powering just the essentials -...
  12. JBertok

    Information for old solar heating system

    Most solar hot water systems have a differential temperature controller that operates a small low-wattage recirculation pump, typically a Grundfos or similar. The differential controller's only job is to run the pump when the collectors are hotter than the tank(s), circulating water through the...
  13. JBertok

    Shunt snapped and caused a fire🔥

    First off, I'm sorry for your loss; this looks obviously expensive. A few points: - A few people brought up the breakers. Although not the root cause here, AC breakers don't work in DC environments. It's not a matter of over-current protection, an AC breaker will trip if overloaded with DC...
  14. JBertok

    Crazy things you do with excess power

    Natural gas prices are rising parabolically here. I have a late 90's set of Maytag Dependable Care washer and natural gas dryer. A few months back on a whim I looked at FB Marketplace to see if I could find a matching vintage electric version of the dryer and found the exact model 10 minutes...
  15. JBertok

    I need some help with my Schneider System

    Are you disconnected from AC1 and putting the XW into Standby using Insight?
  16. JBertok

    I need some help with my Schneider System

    When the utility put in the auxiliary meter, did they give you a 240V leg right off a transformer rather than 120/120V 240V split phase?
  17. JBertok

    I need some help with my Schneider System

    Good catch. Yes L1 and L2 should both be 120V with AC1 around 240.
  18. JBertok

    XW Pro 6848 with generator issue after firmware update

    That makes sense actually. I believe Schneider was having problems with generator users staying AC2 qualified running on Generator. Your experience suggests they may have loosened up the qualification parameters. As far at the firmware version programming errata, there are a few threads...
  19. JBertok

    I need some help with my Schneider System

    Under Configuration / Reset / and then "Reset All Settings to Factory" is what I was referring to with starting from a clean slate. Might be worth the time to take notes on your settings before it's wiped.
  20. JBertok

    I need some help with my Schneider System

    Reviewing your screenshot... I don't see the "Grid Codes" option for your version of Insight. It would be right there on the screen you captured as the last item on the Right. I also see that Sell Enable/Disable is Enabled. Would like to see some load on it to see what happens.
  21. JBertok

    I need some help with my Schneider System

    Need to confirm that: - Grid Support is Enabled - Sell Enable/Disable is Enabled Once AC is qualified it should stop inverting, go into Pass-Through, and then begin a 240 second countdown until the XW syncs to the grid waveform and Grid Support activates. Does it ever switch to Pass-Through...
  22. JBertok

    DC MCCB is this correct

    Yes, but only when connected like the diagram shows in the 2 circuit examples under 2P. No matter which way current flows in those examples, one of the two tied breakers will trip under proper polarity because polarity is opposite between each pole, and that will break the arc.
  23. JBertok

    DC MCCB is this correct

    DC breakers are polarity specific because of a magnetic component involved in preventing arc when tripped - and that can only work in the right polarity. A 2P breaker allows for bi-directional protection because the two poles are wired in reverse polarity from each other. In that way, no...
  24. JBertok

    Here's a 48V FLA SoC chart

    They're struggling already with resistance, 4 years old. Each day I let them run down about 20%, the next 30% I keep around for power outage. It's eight 440Ah L16s - comedically undersized for a pair of XW Pros. It would take 80kWhr of usable storage to fully utilize the system I have now...
  25. JBertok

    Here's a 48V FLA SoC chart

    There is nothing I hate more than my Flooded Lead-Acid batteries, but I am committed to keeping the promise I made to myself that they would not be replaced until something Lithium Iron Phosphate or Sodium Ion becomes available with USA-manufactured cells. So, they remain in-place for now...
  26. JBertok

    Solar Panels on a Tesla

    Does urinating into a swimming pool raise its level? Technically, "yes", but... The range of a car most effectively be extended by lowering its weight and/or drag. I would bet money that dropping the suspension 1", adding 5psi to each tire, and replacing the side mirrors with cameras (which...
  27. JBertok

    Best Inverter setup

    A Dual-XW Pro system will have the most complex commissioning procedure of all of your options, however it will give you the most control and flexibility too. You can easily stack 2 XW-Pros in split-phase mode. In that configuration both XW Pros produce split phase unlike other manufactures...
  28. JBertok

    what brands are best

    Is it possible that advice is coming from a context of grid-tied inverter system specification? That's the only type of solar installation where this would be a concern because grid-tied system generally have no battery and must immediately invert the DC to AC to feed back to the grid. Not...
  29. JBertok

    The Rooftop Solar Industry Could Be On the Verge of Collapse

    Good. The Rooftop Solar INSTALLATION industry, as it stands today, needs to be decimated. Generally speaking, that segment is predatory and misleading, and uses the same tactics car dealers do where they talk only about monthly payment and not interest or term. Solar Installers are in the...
  30. JBertok

    Schneider Conext Insight Home help please

    I have an idea that might help... On your internet router, create a Port Forward rule with an arbitrary port number you can remember, and in the Forwarding rule have it point to the IP of the Insight and translate to SSL port 443. (You can set the Insight to a Static IP Address, and I always...
  31. JBertok

    XW Pro - charge/discharge in loop when voltage goes below 52

    This might help with some of the voltage setpoints. It's a slide I pulled from one of Schneider's videos that explains the points at which the XW Pro changes modes internally. The LBCO+1.0V is not a clearly documented setpoint, for example, and you cannot see it or change it but it is there.
  32. JBertok

    First Solar Setup. Need help.

    Hello, I don't work here I just lurk and cause problems, but with that out of the way - welcome! Okay, so the 2 AGM batteries and their 30amp charger are outgoing. Good - you cannot mix AGM and LiPO4 on the same DC system. Since you're new, I need to ask, are you aware of the low temperature...
  33. JBertok

    Schneider XW Pro commission

    A few items: I think that this is too many devices for the single XANBUS on an Insight Home. You're going to need Insight Facility for this because it's got 2 XANBUS networks. I'd probably put the MPPTs and Disconnect RSs on one, the 2 XW Pros, AGS, and BattMon on the other. A characteristic...
  34. JBertok

    Capacitor

    To your point - YES supercapacitors are a fantastic compliment to lead-acid batteries because a sufficient bank of them allows prevents voltage sag on the DC bus when a surge load hits. Your capacitor bank needs a voltage rating high enough to handle the most possible voltage your DC bus could...
Back
Top