Recent content by HaldorEE

I realize this is an old thread, but it popped up when searching for a different thread and I realized nobody else had my insights on this subject. If you really want protection from dirty power, voltage fluctuations and short dropouts, the best solution has been around for decades. A...

Current levels make the difference. Signals in phones are measured in mA. Inverters in 100's of amps.

The phrase rms Watts is a misnomer since Watts when referring to AC is ALWAYS rms, anything other than this is simply someone trying to sell something. The problems is unscrupulous companies have used the term "watts" in wildly incorrect ways when overstating the capabilities of devices they are...

RMS and Power factor are for AC power. There is no such thing as RMS Watts for DC. When converting units it is a good idea to include all of the units in the calculation and cancel out units as you multiply or divide by other units. V/V, A/A or W/W cancel that unit out. If you don't end up with...

My first on-line (BBS) experience was with a glass teletype with a 300 baud acoustic modem you had to manually dial the BBS number then insert the handset into the couple cups. The one I had, used an 80 character x 25 line display. This one prints on paper!

Got to roast their nuts.

RMS is a way of equating AC power to the DC heating equivalent assuming the power factor = 1.0. This is based on heat rise measured in a non-inductive resistor. What this really means is that RMS only means anything for purely resistive loads which is virtually never the case in real life. When...

Are you using cables between the battery and the inverter? You can get clamp on cores that will work with round cables or flat bars. You will want to locate these as close to the inverter as possible.

Did ferrite cores on the DC cables feeding the inverter make any difference? I would be willing to bet that is how the RFI is radiating out of the inverters.

Sad. I used with work with guys like these when I installed process control systems. I did see an operator get across a pair of 480V bus links. He didn't die (the discharge was through his forearm), but he was mess up. They were getting inside a control cabinet to do "stuff" through a...

A powerwall is a packaged system that includes the battery and all required support circuitry. Systems can include the inverter and chargers. Makes sense a powerwall would include a heating system to permit charging below freezing.

Operating temperature range, as in you can draw power from it to -20? Charge? Not without a heater which it could have since this is not a battery, its a Powerwall type product.

Mixing DC and AC wiring is permitted, but you have to meet double insulated requirements. Loose wiring can be in shrink tubing, or you can use jacketed cables.

If you are referring to neutral to ground impedance, it is easier to just measure AC voltage between the neutral and ground. It should be < 2VAC when pulling a heavy load from an outlet. Trying to measure ohms on AC wiring is difficult unless you kill power to the entire house. Otherwise power...

Personal ESD grounding wires get checked every day for shorts or opens.