On 8/20/19 12:17 PM, Lee Hart via EV wrote:
From: Willie via EV <[email protected]>
Subject: [EVDL] sources for 12vdc to 24vdc converters
Can anyone suggest? Looking for 1kw or larger.
Seems like something you would be found for long-haul truckers. Many of their
accessories are 24vdc, but some truck only have 12v systems.
How long do you need that 1kw of power? If short-term, how about two 12v
batteries in series? In a vehicle, one at a time could be charged by the
vehicle's 12v system. Use a switch or contactor to swap back and forth,
alternately charging one then the other, while the pair of them continuously
power the 24v load.
100% duty cycle. I'm exploring using Enphase M215 micro inverters
powered from an EV's 12v DC-DC following this scheme:
https://teslamotorsclub.com/tmc/threads/powerwall-2-0-backup-runtime-extender.126358/
and the suggestions of others here.
This will be but a piece of a home backup power scheme. It can
supplement a PowerWall or some other micro grid. Suggestions on other
minimal micro grid schemes solicited. One attraction of the micro
inverters is that they will semi-gracefully shutdown when demand is low.
Also, the modularity. Not enough power? Just add another EV.
I'm not sure the micro inverters (for 60 cell panels) will do well with
24v; I'm seeking an "upverter" with adjustable output.
I haven't found specifications of the capacities of DC-DCs on various
EVs. I suspect they will all supply at least 1 kw.
Thanks!
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