Sent email to Steca, Germany as follows
Dear Sir/ Madam
On Thurs 6th November I bought, from Wind and Sun - one of your registered distributors, a Pro1010 controller, serial number 953154, to regulate the output of two 50 watt solar cells to a 100Ah battery.
I connected them yesterday around 2pm 8th November and noticed the draw on the battery, according to the inbuilt monitor, was 0.1A. As there was no load connected I thought the 0.1A which occasionally flashed to 0.2A was the units inability to process the low self consumption, rated in your manual as 0.0125A (12.5mA).
I was going to disconnect the unit from the battery overnight in case there was such a usage but decided to leave the battery connected.
This morning around 8am I checked the usage and found the total at 2Ah. As I have write this email at 10am it reads 3Ah. This, I reiterate, is with no load connected to the output terminals.
So at 10am
Solar in 2.4A
to Battery 1.2A
The above figures are a mystery
I assume the 1.2A is being dumped to heat whilst the 'load' seems to rise with Solar input; yet is still 0.1A at night. Could you please explain these readings as they are not what I would expect nor want?
Looking forward to your response.
P.S. I served in the Royal Navy as a Radio Electrician so I am familiar with a little more than basic electrical wiring.
Fri 7th I connected one panel, via the Steca Controller, to one old battery. Used it as load battery and measure a use of 10Ah total.
Could see from the Steca the Asus 900 uses 1 amp
Sat 8th Since then I have 2 old 50w panels connected via the Steca to one old battery. The other old battery I have topped up with water, which was a bit iffy as it was a sealed battery. The six cells needed about a litre so hardly surprising it/they were almost unrechargeable.
That battery as end of day on the 9th was rated as 52% charged, by the next morning is was 48%