Recent content by ApproximatelySean

Ok so an idea for a dump load diverter, i think this should be easy enough with minimal programing.. Use the built in victron mppt dump load feature to switch on a relay when battery is 95-100% the realy feeds a second SSR controled by and arduino, the arduino reads from a small 10w mono...

i never thought of using an pwm charger that way, ''Conect all the charging sources direct to the battery''? in my case with the 48v batt and 190v pv would that work? or does my victron mppt count as the charging source?

thats very interesting! how do you determin how much excess power is available? any more information on construction?

Why 48v? Could I not take the pv direct from panels? Can't remember exactly but it runs at about 190v

On a good day I have 4kw PV, inverter rated for 3kw 5kw peak, and dyness 48v 100ah lithium, I done some tests and while I have 4kw pv that can drop to 500w when I cloud passes over so the battery will have to carry the full2.8kw load untill the charge drops enough to cutoff the dump load or the...

I didn't think anyone used pwm for charging batteries anymore? Perhaps if the Victron when entering float mode triggers a relay to divert DC to that pwm charger and run Right, well my inverter is 220v and so is my heater, it has two modes sink 1100w and bath 2800w so while it would be nice to...

Now that's the thing, I got watching videos on "micro cycling" and what this guy was saying is a discharge of (5%) x20 times a day = one full battery cycle?? Idk if this is accurate but if true would totally change the "free power dump load" if it means I need to replace my batt 2 years early

I have been looking at that, here's the full options with my 250 60, I'll go over it again when back at base as I can't make this demo do anything, still without pwm I'll either have to choose a very underated heater (and lose most of my opertune load) or risk bouncing my battery every time a...

On the topic of PWM, can a high enough feqency be used to avoid flicker? and what would the long term effects of pwm powering say a 2.5kw load on a 3kwh victorn multiplus? is that kind of iregular load a problem ?

So when your DC dumping are you cheking for high panel voltage? and did you ever successfully work in pwm? I still dont see why an arduino could not ramp up the pwm duty untill the smart shunt reports a negitive draw on the battery or even an in curent that is marginaly lower then float..

So I have a common problem but im hoping things have inproved since none of the solution i've found so far are optimal, I'd like to dump excess solar PV 'Not battery power!' into a water heater, preferably id like the dump whatever is available be it 500w 1kw or 3kw so PWM seems like a good idea...

Anyone care to explain what a bulk charge, absorb, float should look like? when my voltronic brings my 100ah lithium up to 55.5v float i notice that the 1300w or whatever it had been utilizing gets cut down to maybe 40w or 0, but this is not stable it will spike to 500w for a few seconds then...

So i'm building my first system and my voltronic axpert is functioning A ok untill after a day of running it throws up an error code which is un readable to me becuase the LCD simultaneously takes a crap and half black out.. a hard reboot solaves this only for the issue to arise again, it...

What makes a good off grid LED bulb? in my case running off a 220v system, will a dimable bulb handle voltage fluctuations better than an standard? are all current name brand 'Philps' bulbs relatively good? or is flickering, poor colour still an issue? Any experience or input appreciated..

So I'm getting my head around PV but now I'm thinking a wind back up would be good, i see some are DC some AC? does MPPT come into play with turbines? could i use a bypass diod to switch between turbine and PV depending on which is supliying the most power? I can allready see this is an issue...