diy solar

diy solar

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  • Post in thread: Signature Solar wins... I lose.

    A forklift operator would have a hard time putting a fork through a steel container that the panels come in from China.
  • Post in thread: Solar charge controller not reporting unused solar capacity

    It is like your power meter on your house it cannot tell you how much power is available from the power plant it can only tell you what you are using.
  • Post in thread: DIY Geothermal?

    I have been on a ground source heat pump for 25+ years I have 700 feet of vertical loop in 4 wells and a 36K BTU heat pump. You will need 9 gals per minute which will give you a 10-degree rise in your water temp. I live in the deep south near the gulf coast and the humidity is the real killer...
  • Post in thread: Heltec (JK) 200A Smart BMS with 2A Active Balance

    If you are going to do DIY solar stuff you need to correct this.
  • Post in thread: Code-Free Outdoor Electrical Enclosures?

    Ship to store is much better than ship to home you do not have to take it if there is damage that you cannot take and Home Depot has a good return policy.
  • Post in thread: How did your solar fare during the January '24 freeze?

    An air-to-air heat pump in your area is not recommended due to the low COP (less than 1) at the low temps you get however a water-to-air heat pump COP can be as much as 3 or more.
  • Post in thread: Idea for an affordable rainwater collector

    Builders plastic sheeting spread on the ground with a layer of gravel to protect it from the sun with the gravel the most expensive part.
  • Post in thread: DIY Coulomb counter for LiFePO4

    I have one I programmed for my use I measure battery volts and battery amps every 10 seconds and multiply the two to get watts then multiply that by a fraction to get a number to get watts per hour that fraction is dependent on your sample rate then add that to the total watts the battery will...
  • Post in thread: Fluid Heat-sinking an air conditioner?

    I have one of those it requires 8 gals a minute for the condenser/evaporator depending on the mode. in heat mode, it has a cop of 4.2 in AC mode the seer is 14. 36,000 BTU I have 700' of ground loop
  • Post in thread: Cell price drop

    I have had so far 7 days of heavy clouds my 80kwh is down to 35kwh yep I could stand to go to 100+kwh for week like this.
  • Post in thread: My Solar PV journey is officially ending

    Yep, I am about 30 miles north of the Gulf of Mexico.LOL It is used here for cooling as it is the most efficient cooling there is as it uses 75° water for the condenser instead of 100° air.
  • Post in thread: LiFePo4 Cell went up in smoke and flame!!

    If they were Lithium-ion the fire ex would not have put out the fire.
  • Post in thread: How did your solar fare during the January '24 freeze?

    My system did ok for the freeze batteries dropped to 45 KWH took two days of sun to recharge to 95 KWH
  • Post in thread: Daly smart BMS

    Your power supply is sensing the voltage at the power supply terminals and does not correct for voltage drop on the wire you connect to the battery unless it is a good power supply with remote sensing (4 wires) it will also work better if you use larger wire going to the battery and NO alligator...
  • Post in thread: Using excess solar to heat house

    If you have excess power you can use an electric space heater to heat up your house in the winter much cheaper than what you are looking at.
  • Post in thread: BMS

    Yep you can connect a 60 amp BMS to a 1000 ah battery.
  • Post in thread: Powering a mini split

    I wish they did only one or two do come with fully charged lines the rest come with lines that you need to get the moisture out and pull a full vacuum to do that. Also, most get out of their warranty by requiring that a licensed AC man do the work for a DIY install.
  • Post in thread: Day use only, dont need to store power in a battery

    Inverters need a battery to handle surges that the solar cannot supply for your fridge, water pump, and power tools.
  • Post in thread: Any way to see if all the panels are connected and working from the voltage or any other number?

    Yep now your voltage looks normal and the power level for 5:30 pm looks good.
  • Post in thread: Battery banks, parasitic loads and low sun hours

    It seems that your battery does not have a separate breaker to also disconnect the battery and is using the fets in the BMS to turn off the battery all fets have leakage and will pass some current it is in the microamp range but can be measured and will charge up a cap in the inverter. I think...
  • Post in thread: DIY Geothermal?

    Copper tubing is a waste of money as the limiting factor is the ground it is a poor conductor of heat the plex tubing that is used for floor heating is much cheaper than copper.
  • Post in thread: DIY 96v lifepo4

    Good choice on voltage as there is an abundance of 90VCD motors be aware that 10 HP internal combustion is less than 10 HP in a DC motor which means that you do not need a 10 hp dc motor.
  • Post in thread: Ive had solar for a year and now the utility company charges a demand fee... not cool.

    He said kilowatt not kilowatt hour.
  • Post in thread: Excess energy in off grid system

    It would be wiser to just add them into your system
  • Post in thread: Large spiky current draws with no additional load... ah crap

    Those breadboards are not good for long-term use as they develop bad connections on the chips due to not being soldered or gold plated but are good for prototyping and proving it works. If you unplug the chips and just put them back in your problems may go away.
  • Post in thread: Strange issue with 48V LiFePO4 system

    Where are you measuring your power draw? if from the output of the inverter you are missing the inverter draw and efficiency numbers.
  • Post in thread: New battery plants for the USA

    Ford has just announced that they will be building battery plants in the USA for EV"s. Ford announces $11.4B partnership to invest in new electric vehicle plants, battery production
  • Post in thread: Battery banks, parasitic loads and low sun hours

    @SHTF Power Anyway If your batteries are consuming 30 watts per hour you need to return them as they are defective. The self-discharge is listed in the manual in the specs here is a screenshot of that.
  • Post in thread: 75kwh of EG4 LifePo4 storage draining overnight with 1-2kw load.

    I did a little math and I think you are not fully charging your batteries with only 8 panels and on bad sun days it gets worse. On a good sun day I think you are only getting 3kw of power an hour and i think that is on the high side.
  • Post in thread: Inverter Generator

    Do you mean 20000000Wh or 20000KWh.?
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