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xtra-raum avatar image
xtra-raum asked

How can i improve the efficiency of the battery charging (AGM) with my EasySolar system?

Equipment: 1 x EasySolar 24/3000/70-50 Color Control GX; 2 x AGM 110 Ah 12V; 4 x PV Panel 330 Wp; Grid connected

Settings: EES with feed-in excess solarcharger power, phase compensation; min SOC 20%; Batterylife state: self-consumption; Grid setpoint 0W, scheduled charging disabled

Situation:

I have just checked the data of the first 2 weeks of operation: I have

- solar production: 79,5 kWh

- direct use of solar: 17,5 kWh

- solar to batterie: 25,5 kWh

- solar to grid: 36,5 kWh

- total consumption: 37,0 kWh

- direct from solar: 17,5 kWh

- from grid: 1,5 kWh

- from batterie: 8,0 kWh

So I put 25,5 kWh into the batterie and got only 8 kWh out! This is a poor efficiency of ~ 30%!

Is there any change in the settings possible to improbe this rate?

battery chargingEasySolar All-in-One
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xtra-raum avatar image xtra-raum commented ·

sorry no typo. The 8,0 kWh deliverd from the battery is correct!


Here are some more information from the settings in the VE configure:

General tab:

- enable battery monitor: selected

- Battery type: Gel/AGM, Victron Energy, Gel Exide A200

- state of charge when Bulk finished: 85%

- battery capacity: 110 Ah

- charge efficiency: 0.80

Charger tab:

- Enable charger: selected

- Storage mode: selected

- Charge curve: Adaptive + BatterySafe

- Absorption voltage: 28.80 V

- Float voltage: 27.60 V

- Charge current 52 A

- Repeated absorption time: 1.00 hr

- Repeated absorption interval: 7.00 Days

- Maximum absorption time: 8 Hr


ESS Assistant:

- Battery system: System uses Gel or AGM batteries

- The battery capacity of the system is : 110 Ah

- Sustain voltage during first 24 h of sustain: 23.00 V

- Sustain voltage after 24 hours: 25.00 V

- cut off voltage for a discharge current of: 0.005 C = 24.00 V; 0.25 C = 23.30 V; 0.7 C = 22.80 V; 2 c = 22.40 V

- inverting is allowed again when voltage rises : 0.60 V above cut-off(0)

- Are there PV inverters connected on the AC out of the Multi/Quattro system?: No




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JohnC answered ·

Hi XR. I note too that your consumption figures don't balance. If that 'from batterie' figure was 18.0 instead of 8.0 it would. And would also give you ~70% batt efficiency, typical of what I see with Pb's.

Clerical error? Maybe not, but needs asking.. :)

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