I have recently had installed Solar-Water and Solar-PV (Photovoltaic) systems.
As part of the deal, I promised to computerise data collection from these systems. The trouble is, I am unsure what datalogger(s) to purchase...
I have 3 temperatures to record from the Solar-Water, and current and voltage to record from the Solar-PV.
What would be the best setup for recording this data effectively and cheaply?
Accuracy is not that important - within a degC and a few tens of Watts.
USB is preferred, but if I can run USB to RS232, that's not too much of a problem. Probems start when a printer port is required as the capturing PC is a Mini-ITX and is minus such.