Bill,
Well, what can I say? My Sure Power isolator works just fine.
I think the voltage should be at least 14 volts before installing
the isolator.
Before the isolator, the voltage was more like 14.2 + on my '90 westy.
After installing the isolator, it did drop to 13.8 volts.
But both batteries, one being a deep-cycle Optima,
charge very well. I think the Optima deep-cycle likes the 13.8 volt
charging.
Sometimes I camp for 3 days, with
extra lights and plat cat heater, etc., going and
draw it down quite a bit. Usually take a trip into town, and
it charges up pretty fast. Enough for another night of luxury camping.

I never have to watch the led indicator panel.
Also I never bother with a trickle charger.
The starter battery stays in top condition, my main concern.
Well, with regard to relay vs. isolator, everyone has their own preference.

Oh, the sink P- trap - I found that in a local camper supply store.
Think it's a pretty common item.
Harald
'90 westy

Bill wrote:
> It was the tech support guy at Sure Power who said that 13.7 or so volts
was
> not enough for the sure power to work correctly.

> By the way, thanks for your post regarding the sink P-trap last fall. I'm
> going to look for they one you got. Any ideas where I might find it?
> Thanks
> Bill
> 90 Westy Syncro
> Lake Tahoe
>