Wayne world

[jon_d]

I have no idea what damage you have done when you had the big zap, but it can't have been good.

Me neither, but it is entertaining none the less. Tin hat readied; umbrella opened, fan disconnected.

[T1 Terry]

011307BC-1CF6-40E1-BC69-A715F4D369E5.jpeg
No 4 is the top one yellow
blue on number three on the bottom
Yellow goes goes battery negative on the pl20
Blue goes to the Kemo timer relay section

Put your glasses on Wayne, number 4 terminal has a (-) and 4 and the blue wire attached, number 3 terminal has a (+) and 3 and has the yellow wire attached.
Now look at the first page in this thread and look closely at the photo of the PL20, can you see where the yellow wire is attached in that photo? The yellow wire is in the far right terminal marked LOAD (-) in that photo isn't, not in the BAT (-) terminal.
It was never going to work after you wired it up wrong and I now have no idea what has failed that is now allowing the solid state relay to send current through.

T1 Terry

[jon_d]

Just wondering what the function of yellow wire on the "Load -" terminal is?

[Mrcoolabah1au]

Part of the T1 control box

06A93C84-3548-44C6-8442-EA298BC865EA.jpeg

[Mrcoolabah1au]

Well after a full day sunshine still no sign of solar reading the everdents is not show up so will have to start tracing or tracking for solar in come have to start some were but were have try several places with multi meter

[T1 Terry]

Just wondering what the function of yellow wire on the "Load -" terminal is?

The Plasmatronics controllers can be programmed for multiple different functions. One function duplicates the control the unit uses internally to control the solar to limit the battery voltage. By setting the load terminal on the PL20 to be open circuit when not trying to limit the solar charging current and PWM linking to the battery negative when the PL20 starts to try and limit the current from the solar, this terminal is either floating or PWM switched negative. By placing a resistor between battery positive and this terminal, when the terminal is floating (not trying to limit the solar charge current) the resistor forces this terminal to be battery positive. By connecting this terminal to the control positive of a solid state relay the PL20 is supplying a positive signal/supply to remote control the solid state relay. If the PL20 wants to limit the current from the solar to control the battery voltage, it pulse width modulates the time the load terminal is pulled negative. The resistor just becomes a miniature heater element when this occurs because battery positive is supplied to one side and a varying negative voltage on the load terminal side and in turn the terminal is pulled to a lower and lower voltage until it is not enough to fully open the SSR and eventually fully open the SSR that cuts the flow of current across the load terminals of the SSR. As many SSR's as required can be driven this way, if the total load exceeds 20 amps, the max load for the PL20 load terminal, an intermediate SSR can be used so the PL20 control that relay and in turn it controls all the other solid state relays.
The PL20 is the control but the capacity of the bank of SSR's is the current limit, I've run 3.8kW of solar into a 12v 700Ah lithium battery using this set up and 5.2kw of solar into a 24v 600Ah battery on another off grid install. The only problems I've ever had was I once used a cheapie SSR bought from evil bay that was supposed to handle 220vdc at 100 amps. It actually caught on fire while controlling 30 amps & an open circuit voltage of 120vdc and caused serious damage to the rest of the control board. A rather expensive and embarrassing lesson not to ever do that again. The SSR's from RS components we use for that purpose these days cost over $150 each and we have to buy them in bulk to get that price, so we have developed a different control method when these voltages are involved.
The other side of the control on the SSRs is controlled by our T1 Lithium BMS as a secondary charge control if a cell goes high voltage while the battery voltage is still below the PL20 control threshold.
These solid state relays can produce a bit of heat when in current control mode, so we mount them on heatsink. If there are multiple SSRs involved, we build a suitable tunnel heatsink, add 50*C thermostats above each SSR and use them to control a m
Maglev fan to pull air through the tunnel heatsink to avoid overheating the SSRs. Very careful selection of the SSR used is imperative, minimal voltage drop across the FET is a must or the heat can not be controlled simply using air, it would need a water cooled heatsink and that is just over the top for such a charging system. The losses are serious as well if the wrong SSR is used.

T1 Terry

[T1 Terry]

Well after a full day sunshine still no sign of solar reading the everdents is not show up so will have to start tracing or tracking for solar in come have to start some were but were have try several places with multi meter

Does the Victron BMV show charging current? If so, the battery is charging. The PL20 will not show any charging current because there is no PLS or cable between the Plasmatronics shunt and the PL20.

T1 Terry

[Mrcoolabah1au]

No the victron is sitting on 000 amps all the other function are working fine victron tell me soc , volts ,amp used and if I switch some on it will tell me the fridge is pulling 3.5 amp switch the fridge off I bright sunlight go back 000
Going to be wet over the weekend so don’t think will sun

[jon_d]

Just wondering what the function of yellow wire on the "Load -" terminal is?

The Plasmatronics controllers can be programmed for multiple different functions. One function duplicates the control the unit uses internally to control the solar to limit the battery voltage. By setting the load terminal on the PL20 to be open circuit when not trying to limit the solar charging current and PWM linking to the battery negative when the PL20 starts to try and limit the current from the solar, this terminal is either floating or PWM switched negative. By placing a resistor between battery positive and this terminal, when the terminal is floating (not trying to limit the solar charge current) the resistor forces this terminal to be battery positive. By connecting this terminal to the control positive of a solid state relay the PL20 is supplying a positive signal/supply to remote control the solid state relay. If the PL20 wants to limit the current from the solar to control the battery voltage, it pulse width modulates the time the load terminal is pulled negative. The resistor just becomes a miniature heater element when this occurs because battery positive is supplied to one side and a varying negative voltage on the load terminal side and in turn the terminal is pulled to a lower and lower voltage until it is not enough to fully open the SSR and eventually fully open the SSR that cuts the flow of current across the load terminals of the SSR. As many SSR's as required can be driven this way, if the total load exceeds 20 amps, the max load for the PL20 load terminal, an intermediate SSR can be used so the PL20 control that relay and in turn it controls all the other solid state relays.
The PL20 is the control but the capacity of the bank of SSR's is the current limit, I've run 3.8kW of solar into a 12v 700Ah lithium battery using this set up and 5.2kw of solar into a 24v 600Ah battery on another off grid install. The only problems I've ever had was I once used a cheapie SSR bought from evil bay that was supposed to handle 220vdc at 100 amps. It actually caught on fire while controlling 30 amps & an open circuit voltage of 120vdc and caused serious damage to the rest of the control board. A rather expensive and embarrassing lesson not to ever do that again. The SSR's from RS components we use for that purpose these days cost over $150 each and we have to buy them in bulk to get that price, so we have developed a different control method when these voltages are involved.
The other side of the control on the SSRs is controlled by our T1 Lithium BMS as a secondary charge control if a cell goes high voltage while the battery voltage is still below the PL20 control threshold.
These solid state relays can produce a bit of heat when in current control mode, so we mount them on heatsink. If there are multiple SSRs involved, we build a suitable tunnel heatsink, add 50*C thermostats above each SSR and use them to control a m
Maglev fan to pull air through the tunnel heatsink to avoid overheating the SSRs. Very careful selection of the SSR used is imperative, minimal voltage drop across the FET is a must or the heat can not be controlled simply using air, it would need a water cooled heatsink and that is just over the top for such a charging system. The losses are serious as well if the wrong SSR is used.

T1 Terry

Thanks. The load terminal controls the SSR and the SSR is pulled off via the resistor when the load terminal is "off". (floating using an open collector circuit.)

[Mrcoolabah1au]

Thanks joh