Geyser timer solution for solar

wingnut771 said:
Even at 55.2V?
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Yes. Only under certain conditions. Let's say the battery is at 96% as per bms SOC and I draw something heavy and it drains and then switches back to charging at 100% it gets that OVP warning.

If there is no load on the battery and it charges normally then at that voltage it seems to cut out at around 89% SOC and just stays there. It doesn't go higher.

At 55.6 which it is now it does go to 100% eventually
 
cavedog said:
Yes. Only under certain conditions. Let's say the battery is at 96% as per bms SOC and I draw something heavy and it drains and then switches back to charging at 100% it gets that OVP warning.

If there is no load on the battery and it charges normally then at that voltage it seems to cut out at around 89% SOC and just stays there. It doesn't go higher.

At 55.6 which it is now it does go to 100% eventually
Click to expand...
Can you set absorption time on inverter? I would take SOC counter readings with bag of salt.
 
wingnut771 said:
It probably resets to 100% when cell 5 hits OVP.
Click to expand...

I hit that alarm 4 days ago but it's probably just because now I have the geyser on and the poor pv last few days so I'm not getting to 100% fast.
 

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wingnut771 said:
Why does it use all different watts?
Click to expand...
As far as i have it some solar geyser setups uses 3 panels with an mppt basicly running element directly from the panels ie no inverting to 220v ac

The wattage then depends on solar output as clouds roll over or angle changes wattage changes
 
cavedog said:
Yes. Only under certain conditions. Let's say the battery is at 96% as per bms SOC and I draw something heavy and it drains and then switches back to charging at 100% it gets that OVP warning.

If there is no load on the battery and it charges normally then at that voltage it seems to cut out at around 89% SOC and just stays there. It doesn't go higher.

At 55.6 which it is now it does go to 100% eventually
Click to expand...
Having a charge voltage that is lower the amps will drop off and take longer to get full as long as it still accept charge 1A or more the bms will keep balancing

On many they only balalance while charging and only when cell voltage pops over 3.45v

Tha battery spends verry little time there normally
 
leon.davibe said:
Having a charge voltage that is lower the amps will drop off and take longer to get full as long as it still accept charge 1A or more the bms will keep balancing

On many they only balalance while charging and only when cell voltage pops over 3.45v

Tha battery spends verry little time there normally
Click to expand...
Looks like his charge voltage is 57.6V.
 
leon.davibe said:
As far as i have it some solar geyser setups uses 3 panels with an mppt basicly running element directly from the panels ie no inverting to 220v ac

The wattage then depends on solar output as clouds roll over or angle changes wattage changes
Click to expand...
They don’t push from the panel straight to the element otherwise it won’t meet certification for the thermostat.

Some do PWM, others a modulated wave.
 
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