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Inverter as dump load
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10
comments (10 topical, editorial)
Re: Inverter as dump load
(
3.00 / 0
) (
#9
)
by Opera House on Tue Aug 19th, 2008 at 02:28:06 AM MST
(
User Info
)
Consider using a timer instead of a shut off voltage. Just calculate how many watts you want to dump at a time. I have a freezer/fridge I use as a dump load. When battery voltage gets to the preset level, it turns on the fridge for 8 minutes. I use a LM431 as the voltage detect and a MC14541 as the timer chip that can time from seconds to hours. This turns on a Harbor Freight 2,000/4,000 watt inverter. These are cheap, costing me less than $20. Multiple heater ranges is way over thinking it. Operating a 220 heater at 110 just means that it takes four times longer to heat. Damaged inverters are cheap and there is no reason why you can't just use the DC section if the output FETs are fried. Have multiple dump options and prioritize on just a couple mv difference of trip voltage. My fridge works great with just this control. I haven't even bothered to hook up the temperature control I have for it.
Inverter as dump load
|
10
comments (10 topical, 0 editorial)
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