question

Yes, it should work if the load is purely resistive and static. If the load is more complex, all bets are off.

Hi all,

Does it really work with resistive load? Does anybody have any experience with usage of MPPT 150/70 (or similar) for 24V DC heating element but without battery?

Thanks for sharing experiences in advance ...

Ji

Did you do this setup in the end and if so did it work for you?
How do you handle turning the resistive load off (without damaging the mppt) when it reaches temperature?

I mistakenly had a RS450/100 connected to a Quattro with no battery. When there was enough sunlight, it ran the load. When a cloud came over it dropped out with a low battery alarm. Based on that I would expect it to run a resistive load quite happily, but it's an assumption.

Cmon folks... Its down to the load...

I expect the MPPT charger will protect itself but when h load esceds the input the voltage will drop, because thysics.

Best case the load shuts down the voltage rises and the load strts up, thid could happen quickly and repeetedly and that is likely not good.

A batery, even a small one, damps this oscillation and the load will cycle on and off at a rate determined by the available solar charge, the battery capacity abd he viltage setpoints.

This may be OK, it depends on the load and the frequency. There are few loads that will tlolerate undervoltage for long even if rgw charge contrller is capable of working in CC mode. Battery chargers are one of the few... Need I say more!

Hi all, is it working with a resistive load? What if I use a Victron 100/20 before the Mppt of a Power station to limit voltage/current. I have got solar for 90vdc open circuit, 75vdc at max power, 11adc at max power. Could I use a Victron 100/20, without battery, connected to the Mppt of the power station? Power station input is 60vdc max, 13adc max, 650wdc max. To hit max power the Victron output could be set to 54vdc, 12adc? Thank you.