I have read through some threads regarding systems without batteries, but have found nothing conclusive. I have Victron SmartSolar 75/15 and I think they have updated its construction/firmware since this question was last asked. I want to record exactly how much power my panel is producing throughout the day through VE.Direct. I have another panel set up with VE.Direct so I know how to log the data, however I want the PV power to be consumed by a resistive load (heater) so I can record the power. I tried to connect the heater to the load output on the controller, and change the controller settings to load always on and charger off, and thought this would work. However, apparently the load can only draw current if the charger mode is switched to on. When the charger mode is on and nothing is connected to the battery terminals on the controller, the load output was pulsating current because the system didn't know what voltage to charge at because it is an open circuit. Then I thought I could put the heater on the battery terminals to trick it into thinking it was charging a battery but it is actually powering the heater. This idea is working, however the voltage is about 9.5V despite me setting it manually to 12.5V for both absorption and float voltages (just modified the LiFePO4 default voltages and turned off temp compensation and low temp cutoff). I am happy with how it is running but I am not sure if the controller is attenuating the power output because it thinks the battery is "dead" or something, hence the low voltage. I am going to compare its power output to the system with a battery to see if the power is reduced at all, but I figured I would ask the community first.
And yes, I am okay with the system only logging data during the day, as the controller needs power to log the data.
Any insight is appreciated, it is entirely possible I am overcomplicating things.