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Canadian_Rainbi's avatar
Jan 22, 2017

ECOWISE Voltage regulater fault UPDATE

UPDATE Repaired under warranty. Once I managed to contact the manufacturer things went well. They emailed me a prepaid shipping label, (I had to buy a shipping box) and shipped via Estafeta to Mexico City. Lots of emails back and forth and the unit was returned prepaid. However, lots of running around at this end: Estafeta couldn't find my friends house, which has only been there for 15 years or more. Finally my friend picked it up at the Estafeta office this afternoon.

Meanwhile the Sola Basic I bought sort of worked. It's normal voltage ranges about 112 Volts. Down to 108 or lower when the AC comes on. Switches too slowly to prevent my Xantrex Inverter from cutting incoming power due too low voltage. At the moment we're in Puerto Vallarta where we don't need the air conditioning and the often too high voltage is managed OK by the Sola Basic.

Now I have two voltage regulators. Maybe try to sell one when we come back down in the fall.


Anyone know anything about this unit?







Last year (and in previous years) we have also had problem with high voltage overnight and sometimes, during the afternoon when the demand is high, with low voltage. We looked into various voltage regulation devices and last year on the way home, in Mazatlan we purchased a high tech electronic one.

Back at home in Canada I wired in the required cables and plugs and tried it out when we got here (Zihuatanejo, Mexico) in November. It worked great! The inverter did not have to interfere once, holding the voltage at 118V even when the incoming voltage rose to above 130.

Until one day the lights flickered a few times and the inverter came on. Investigation showed that though there was acceptable voltage at the post there was no output voltage. The indicator lamp was flashing a code which the manual stated showed short circuit in the output. Disconnecting the output, so there was no out connection, the same code showed. I am hoping a transient didn't take something out. I have no diagnostic equipment with me other than my eyes, nose and DMM. Nor a circuit diagram either of course.

I have since ordered a SOLA BASIC 4000 autotransformer that should be here in a week but I would like to get the ECOWISE repaired. I'll check with Home Depot in Mazatlan in March and see if there is a repair facility nearby or even hopefully it might still be under warranty. The SOLA BASIC has a one year warranty so maybe the ECOWISE will.
  • I think I found the problem with the EW50/1 A burnt component on the circuit board. I have sent an email to the manufacturer, waiting to hear

    The component can be seen near the bottom of the fan.

    The sola boost 400 still sent the inverter into Invert mode on compressor start up. I disabled Invert and heatpump didn't start even with the solar boost. The Prosine just blocked the AC IN even though I had temporarily set the Low AC cut off to 90V :E

    I'm beginning to wonder if the suspect 50A plug is causing this large voltage sag, although the microwave runs fine and shows no sign of such a large voltage drop.

    I suppose the fault could also be in the Coleman Mach heatpump. A am wondering about adding a hard start capacitor to it.:h
  • Sorry to hear of the failure and the difficulties.

    The Sola Basic won't keep you dead on 118 volts. It does boost at 110 (10%), 100 (20%), and 90 (30%) volts. At 110 I "see" 118 to 121. I've never observed the 100 or 90 volt boost numbers. The unit acts fast enough that boost is applied before the compressor and fan motor on the air conditioner have spun up to speed. I can hear the difference in fan speed when it drops out of boost mode.

    The Sola drops out of boost some where around 113 to 114 volts, observed inside the RV with a Kill-a-watt meter. It appears to start boost at 107 or 108 volts.

    You can hear relays click on the Sola if it is in a quiet enough enviroment.

    It bucks 10% at 135 volts. I had no way to "force" the sola into buck mode, so I don't know the actual voltages.

    I hope to add better than average surge in the near future. Mexacowander has made up a unit for me and now I'm waiting on his travels to allow for shipping via post.

    I do recommend a plain jane surge device be used in parallel with the input on the Sola. What I am using now for surge is similar to the Progressive and Surge guard units--but at 1/50 the cost. Series might be slightly safer to do--but then the components of the surge device need to handle 30 amps of through put. That becomes costly.
  • The operator's manual states that the unit has a one year warranty. AFAIK, Home Depot will not offer any repair services, choosing to refund your money or replace the item. YMMV.

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