From: muratlanne@gmail.com
"dolmen" wrote in message
news:2b0bcfc1-a41c-467d-aca9-02897f9cb770@googlegroups.com...
> On Sunday, June 3, 2018 at 8:37:48 PM UTC+1, Jim Wilkins wrote:
>
>> The problem I encountered with my solar battery system was the high
>> idle power of pure-sine inverters suited to 120VAC refrigerators.
>> The
>> inverter I have runs continuously and consumes as much overall from
>> the battery as my small fridge. It needs to be sized for the
>> starting
>> surge, which is 12A on mine.
>>
>> I'm testing a Chinese Alpicool DC-powered fridge/freezer which can
>> operate directly on 12V or 24V. It has its own set of quirks to
>> deal
>> with but so far it doubles the battery run time when it's the only
>> load, and may permit a smaller and more efficient modified sine
>> inverter for non-motor loads in the daytime.
>>
>> -jsw
>
> Thanks Jim like I say I've no knowledge on how to build it myself so
> gathering info in the hope I can get enough to perhaps DIY
> Interesting re the Alpicool I've looked at a few DC powered units
> and thought they were mostly shy of having enough insulation so
> haven't bought one yet.
In cool weather the Alpi C20 works well enough as an indoor freezer
set at -18C. Right now my kitchen is at 17C and in midwinter I let the
house drop to 13C. When I put the Alpi in the back of my white SUV on
a sunny 28C day it ran continuously at -12 to -15C until I covered the
cold compartment with a winter parka, leaving the vents clear.
Here in the Northeast USA we suffer summer hurricane and winter ice
storm power outages, sometimes for a week or more. In that case I'd
reset it to -4C which keeps frozen food lightly frosted for a while
but doesn't freeze drinks solid, and greatly increases the battery run
time.
-jsw
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