On 8/20/19 1:20 PM, Lee Hart via EV wrote:
Also, the modularity. Not enough power? Just add another EV.
There you go. Buy a second Tesla. :-) Connect their two 12v DC/DCs in series.
:-)
Semi-obvious jest. But... I don't see that as impossible.
Actually, my first choice of an EV for this task would be an imiev. I
have two so the potential is to get 1kw from each of 3 EVs. A Tesla has
a FAR bigger battery than can be used overnight. An imiev or depleted
Leaf would be better choices. Each would give only 1/5 the power of a
PowerWall but would more than double the available energy; it is the
energy that is in short supply.
I'm not sure the micro inverters (for 60 cell panels) will do well with
24v; I'm seeking an "upverter" with adjustable output.
There may be some problems powering a microsine with a DC/DC or battery. They expect a PV
panel, which looks like a current source. It will be using an MPPT algorithm to try to
find the best current the PV can supply (regardless of its voltage at the moment). It may
not be "happy" with a voltage-source supply like a battery or DC/DC.
I have a Trace MS100 microsine inverter on my 24v PV panels. When the PV
voltage drops under 20v, it shuts down even though the panels can still provide
about 1 amp at that voltage. I tried connecting the panels to three 6v
batteries (18v). The PV panels would happily charge them to about 22v with no
other load.
But the microsine did not work when I connected it to the PV panels + 18v
battery. The voltage was in range (about 22 volts); but the microsine would be
off for 5-10 seconds, then turn on and ramp up the power to just under 100w
over a few seconds; then shut down, wait another 5-10 seconds, and repeat. This
was not a useful way to generate power.
Thanks for the warning. I will be sure to test before I get too far
along. The testing will not require much expenditure; I have a good
supply of the M215 inverters. I hope to run four or five (or more)
inverters in parallel on a single car.
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