Quoting Willie via EV <[email protected]>:
On 4/1/19 1:39 PM, Ron Solberg via EV wrote:
Quoting Lee Hart via EV <[email protected]>:
CHARGING OUR EV OFF PV PANELS
Can you offer any help with two questions related to charging our
Tesla Model 3 off our Tracking 3K PV system?
1. Since our PV system inverter does not produce a sine wave it
has been suggested that I might go through a filter to make the
car accept it. Do you have any idea this might work?
2. This summer we are making plans to add a 4K stationary PV set
using an OutBack sine wave inverter to our house. The present
system works well so are wondering about using a transfer switch
between the two independent PV sets. As we now must
manually manage the power for our house anyway, that should be
helpful by giving us more degrees of freedom as our usage varies.
Thanks, I appreciate the help. I tried to keep this simple. I now
will add more.
You don't say what, if any, battery backup you have.
The existing 3K tracking PV feeds a 20 6V Interstate golf cart
battery. The inverter is custom built by Chad Lampkin of Michigan
Energy Works. On my second set of batteries, the system works well.
We overcharged our first set of batteries as we had not learned to
manually manage the load. For example, if the panels had been
stationary the taper as the sun moved across the sky should have
been helpful. Extra, selected loads (heaters) were not used at first
as the panels moved with sun. Also, we learned to adjust or turn
off the tracker.
We like it as it is.
If it fits your budget, I can HIGHLY recommend a PowerWall. Though
I'm not sure how well it might work without a good sine wave
inverter. It does work well with all grid tie inverters. Though a
grid is not required.
I can tell you that, once your PW battery is fully charged,
balancing load and supply is a very delicate matter.
I can see that the PowerWall is a great product. I Feel the same way
about our Tesla Model 3. I agree that the PV/battery balance is
delicate. We have learned that with our more forgiving cheap, golf
cart battery.
After working with Grid/Wind systems since the 1980s, we have
determined that Grid intertie does not work for us. Likewise, A
Tesla Model 3 might not work for many other folks but does for us.
Also, when I asked about the PowerWall at Eden Prairie,MN I was
told they did not work outside the Metro area.
I'll extol PW virtues if asked.
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