question

Hi @Soul

You don't say how big the batteries are, but not many Amps happening there. So Vbat is slow to rise, likely they're down a bit on charge too.

I think the main issue you have here is the PSU is only rated 28V, so the 5V/1V 'deltas' are always going to be hard to meet, especially when the batts get up in charge a bit. Might be ok with 12V batts, but I don't think that PSU is right for a 24V bank.

You could even consider running without the mppt. Then you have the issue of lack of charge control, and you'd have to deal with that.

Thank @JohnC

I did try running without the mppt, but the issue is that I can't limit Amps. Without limiting amps the load on the generator is too great and drops below battery voltage and turns off charging. The result is a surging of the generator.

Is there a better way to limit AC or DC voltage. Ideally, I use some type of voltage limiter before or after a rectifier and feed that directly into the mppt.

If you have a HydroGen which deliver this high voltage and you have a SmartSolar 250/whatever, use a Transformer to get 120V, put a bridge rectifier and an Electrolyt Condensator of 250V (or higher) with at keast 1000myF on and connect it to the MPPT.

Then let the MPPT do the rest.

Thanks @Michelle Konzack.

My concern with the transformer would be during the two extremes. Under low load getting 240VAC would it not get very hot? Under high load getting ~100VAC would it still be able to function and produce AC voltage that is usable (>30V).

Is Electrolyte Condensator the same as a capacitor?

I am also struggling to find a suitable transformer. Most are ~100VA which (I think) would mean I could only send 0.5 A through at 240V.

Here is an example of what I am looking at. Any suggestions? Siemens MT01100M

Your AB30T produce 240V which give after Rectifier and capacitor roughly 340V DC which will burn the SmartSolar 250 which has a hard limit of 250V.

If you would have a 48V System, you could go with the RS450-100 which support up to 5,6kW, hence it would be suitable even for the AB60T.

The best for you would be a Transformer 240V to 120-150V (ZERO Load Voltage must be checked, then the Rectifier and an Electrolyt Capacitor of at least 1000yF and of course 250V (This thing is bigger then a Beer can) and with 2,4kW you will probably need more then one.

Note: The Power Supplies I build in the past had 1000yF per Ampere output of the transformer.

@mvader (Victron Energy) could you please add/rename topic Hydro, there is already Wind and Hydro and Wind Power topics - the double topic is confusing, single one is good and correct.

I suggest that rename the double-topic Wind and Hydro Power to plain Hydro and maybe fix the discussions where it won't apply anymore. Not sure how much work it would be. Or maybe let someone to do it.