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  1. Any recommendation for buying Solar Panels in US.

    I wonder if anyone would like to share some experience and recommendation of (US or Chinese) retailers selling large 400W solar panels, for DYI instalation and for an amount of 20 to 24 pieces. I am located in Northern California.
  2. Any examples of InfluxDB Cloud to present and store data gathered using Telegraf and shipped to the cloud

    I wonder if any users of this forum experimented and implemented some graphical representation using InfluxDB Cloud to present and store data gathered using Telegraf and shipped to a cloud account? Here is Docker monitoring template sample:
  3. Any Code Violation Issue for Sharing Concrete Hole Passthrough

    I am relocating a 120V 15A receptacle in a building and I need to run between two floors a 12 AWG Metal Clad Armored Cable inside a drywall. I noticed that there was already a pass-through hole used for a water pipe. Would there be any code violation issue from sharing the same pass-through...
  4. Charger Recommendation for LiFePO4 backup system.

    I plan to build a 12 V LiFePO4 backup system to power a refrigerator. I would like to run my refrigerator off grid during peak hours (4 p to 12 am, or 8 hours). I plan to build a system based on 280 Ah Cells, and have a maximum discharge of 80%. I plan to charge the battery during off peak...
  5. Looking for 48 V DC relays

    I builld a 12 V UPS system and I used some relays to provide some remote contol of it. I try now to build a 48 UPS system based on my 12 V design. However, I have difficulty finding 48 V relays. Most of the relays that I found are 12 V or 24 V. I'm suprised that I could not find similar 48 V...
  6. How much Solar energy with only vertically or horizontally mounted solar panels?

    I need some help to estimate a possible Solar energy with only vertically or horizontally mounted solar panels. I have a flat roof and because of heavy wind situation, I cannot have my panels tilted, unless I design a very strong frame support. So practically my solar panels can only be...
  7. Would you connect the (-) 12 V of a solar system to the ground or the Neutral?

    When building an off-grid solar system, which can be used as backup for your home,: - Would you connect the (-) 12 V of the battery to the ground or to the neutral, or keep it floating? - Also would you connect the (-) wire of the solar panels to the ground or the neutral, or keep it floating...
  8. UPS (Uninterruptible Power Supply) Refrigerator Project

    Hi, I currently live in an apartment, so it is difficult to make a Solar Panel project, however because I just bought an Electric Car, I have ToU (Time of Use) electrical power rate, which is about $.50 / kWh at peak time and $.10 off peak at night. I would like to learn about making batteries...
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