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Building Reserve and Using KWH

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  • I use these little meters all over the place, they are accurate and inexpensive..........

    https://www.amazon.com/drok
    Last edited by DanS26; 10-24-2020, 05:31 PM.

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    • Originally posted by DanS26 View Post
      I use these little meters all over the place, they are accurate and inexpensive..........

      https://www.amazon.com/drok
      Price looks right. How did you verify their accuracy ? Any accuracy number estimates ?

      Thanks in advance.

      J.P.M.

      Comment


      • Originally posted by DanS26 View Post
        I use these little meters all over the place, they are accurate and inexpensive..........
        Pretty cool, and cheap. A number of such meters have been worked into equipment
        here. Whenever I get an AC watt meter, I connect a big cap to draw current with a
        zero power factor. A good meter reads zero, just multiplying the A and V will be wrong.
        Bruce Roe

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        • Originally posted by bcroe View Post

          Pretty cool, and cheap. A number of such meters have been worked into equipment
          here. Whenever I get an AC watt meter, I connect a big cap to draw current with a
          zero power factor. A good meter reads zero, just multiplying the A and V will be wrong.
          Bruce Roe
          Their 6 in 1 meter indicates the PF......for $21 its a good deal........

          https://www.amazon.com/DROK-Frequenc...ef_=ast_sto_dp

          Comment


          • The Oct PoCo net metering bill arrived, showed the KWH reserve starting toward winter near 14,000
            KWH, about right. One more week of mostly warm and sun to build on that, before serious cold.

            The use of Energy Star appliances has contributed a lot to reducing energy consumption here. Those
            are all electrically powered, the universal energy management technology, and the one my solar net
            metering system embraces. Most of the electric appliances have been up graded to Energy Star units.
            The apparently 4 decade old electric stove remains, and the ancient microwave has been modified to
            draw ZERO vampire energy until the door is opened.

            I have been watching for high efficiency electric replacements for the 2 remaining propane appliances
            here, water heater and clothes dryer. Much rather do those functions using my available, surplus KWH,
            than buy more propane.

            I did not like seeing the propane flame exhaust heat blowing outside in the winter. So an unvented
            clothes dryer with over 7 cu ft capacity was needed. The PoCo has been trying to steer me into high
            priced suppliers, and finally they showed a model meeting my needs, the full size instead of so many
            4 cu ft unvented. It is a Whirlpool-WHD560CHW, another electronic marvel. It was far from the top
            of the PoCo recommendations, and I found a much better price for it (including delivery) locally.



            Whirlpool.JPG


            I hooked up this UNVENTED heat pump hybrid electric dryer and did a load. Very easy to connect, just a
            30A line and a drain hose. Apparently its heat pump takes heat from the surrounding air, to dry clothes.
            That heat energy is recirculated instead of constantly blowing out of the house. Finally, whatever energy
            was used remains to heat the house in winter, the clothes line is still functional when the weather suits in
            summer. It takes perhaps 50% to 100% longer to finish than the propane unit, I can wait. No more cold
            air coming in from the outdoor vent all the rest of the time.

            It dumps condensate down the drain. My clamp on ammeter shows unbalanced 240VAC drain, significant
            current running down the neutral wire. Am guessing it uses a 120VAC motor, but a 240VAC heat pump.
            Not ideal, but it works, wants a 4 wire cord, 30A breaker. It will be a bit more complex to measure the
            KWH used per load, and I would like to see the variations on each line as it progresses.

            Now the only propane device being used (propane furnace is only a standby backup) is the water heater.
            I would like to attach a Nyle Water Heating - Geyser heat pump model, but a revised model will not be
            available till 2021. It can be moved from one heater (gas or electric) to the next if (WHEN) a tank fails.

            I just found out, hardware store grade propane for my plumbing, looses its gas pressure when out in my
            shed near freezing. Had to leave it in a heated building for a while to proceed. Must be different than
            what is in the 500 gal tank outside. Bruce Roe
            Last edited by bcroe; 11-07-2020, 05:11 PM.

            Comment


            • I just found out, hardware store grade propane for my plumbing, looses its gas pressure when out in my
              shed near freezing. Had to leave it in a heated building for a while to proceed. Must be different than
              what is in the 500 gal tank outside.
              Same grade, but it's the surface area of the puddle of propane in the tank, the little one only has a small amount of area to boil off vapor, the big tank has lots lots of surface area to get vapor from, and when it's cold enough, it won't be able to keep up either
              https://propane.com/safety/safety-ar...-vapor-demand/

              PropaneVaporPressure temp.jpg



              Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
              || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
              || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

              solar: http://tinyurl.com/LMR-Solar
              gen: http://tinyurl.com/LMR-Lister

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              • 240VAC stuff is outside the capabilities of my KILL-A-WATT. Based on the recommendation by DanS26
                I decide to try that DROK 6-IN-1 MULTIMETER --- voltage, current, power, power factor, frequency and
                KWH. The 240VAC heat pump clothes dryer has different loading on the 2 halves of 240VAC, so I set up
                a pair which monitor each. For 2 wire 240VAC loads there is a switch, to allow one meter to monitor all
                with the other meter off.


                DualPwrM3.JPG


                DualPwrM4.JPG


                Measurements. The dual meter pair consumed 1.7W itself, the dryer 0.9W vampire load. When started
                up the dryer used about 1500W on one side, half that on the other, power factor near 1. After a few
                minutes running it dropped down to a pretty steady 800W and 400W, power factor more like 0.8. The
                run was for about 1.6 hr, with moisture sensing, using close to 1.9 KWH total. I am informed overall it
                was a great light show. But the (reversible) door hinges are on the wrong side.

                Meanwhile am getting much more sun than predicted this month, with warmer temps am still building a
                bit more KWH reserve. Usually the slide down starts about 1 Nov. Across the river are some power
                outages from the overnight storm, but here the array is cranking out 15KW. Bruce Roe

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                • I use a set of the older DROK models to monitor split phases from my pad mounted generator. I think its important to balance the loads on my 10kW generator.

                  Monitoring.JPG

                  Comment


                  • Originally posted by DanS26 View Post
                    I think its important to balance the loads on my 10kW generator.
                    Agreed, balanced loads are best. My dryer I believe is the first product with these capabilities, and I expect
                    when a later version is developed, it will be more balanced. But I waited quite a while for this one, and am
                    not waiting any longer. Bruce Roe

                    Comment


                    • Here I'm using the DROKs to monitor my EV circuit in my garage.......


                      EV Circuit Monitor-001.jpg
                      Today is my one year anniversary of EV ownership. My EV experience has exceeded my expectations in large measure.....it truly is the future of transportation.

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