@BLUETTI_CARE Please help me understand how Feed Into Grid setting operates. I have the following configuration under Working Mode:
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SOC 17% - 75%
Time of Use = enabled
Schedule:
0000-0215 Discharge (peak)
0215-0430 Discharge (peak)
0430-0545 Charge (off peak)
0545-0645 Charge (off peak)
0645-2359 Discharge (peak)
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Firmwares:
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IOT Comms 9043.18
EP760 ARM 5023.27
EP760 DSP 5022.21
B500 Safety Module 1026.10
B500 BMU (BMS) 1028.07
B500 Over Voltage Module 1027.06
BMS BCU 1025.27
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My Max Discharge Power is set to 3000W and 33A. When I enabled Feed Into Grid at 08:45 the current SOC was 56% and EP760 immediately output 3kw to grid. I then turned off Feed Into Grid and turned it back on at 10:53 when SOC was 55%. Again it immediately fed into grid 3kw. Both times 0845 and 1053 are inside the 0645-2359 Discharge (peak) period so EP760 is correct with obeying schedule.
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But I expected feed into grid to only start after also reaching SOC High value 75%. The SOC High value is clearly ignored in the feed to grid decision making. Is this working as designed ? If yes, can Bluetti please improve EP760 to also obey SOC High value before feeding to grid in the peak period ?
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Thank you
If the EP760 works in the same way as the EP600, the SOC high value is only taken into account during ‘charge from grid’, whereas during discharge (feed into grid) the SOC low value is taken into account.
This means that discharge only continues until the SOC falls below the low value, i.e. during charging, as soon as the SOC high value is reached, charging from the grid stops.
Charging from PV, on the other hand, is always supported until the battery is completely full, SOC = 100%.
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And since you asked, yes, it works as designed.
Thank you @SigiKa for your great advice! I tested and confirm feed to grid stops when SOC falls to SOC Low value.
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I want to export between 5pm to 8pm and stop export when SOC is 60%, because I want to keep 60% for myself to power loads through the night, and hopefully still have 20% left over for blackouts. So I naturally set SOC Low to 60%. But the problem is once SOC Low hits 60% the battery will NOT power house loads, i.e. battery is bypassed to get power for loads from the grid which costs $$. So I have to wait until next day’s PV production to charge battery above 60% so that loads can access battery again when PV becomes insufficient.
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I find a better method to manage how many kwH is export to grid is not with SOC Low setting but instead by manipulating the Discharge/Peak period length along with an appropriate Grid Max Discharge Power. For example, if I set discharge power to 3000w and discharge period 5pm-7pm the result is about 6kwH exported to grid, which is about 30% drop in SOC on my 19.84kwH system. This way I can leave SOC Low = 20% (for emergency) and still access battery during evening but not dump too much to grid.
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If Bluetti gave us the option for an extra SOC Low setting it might be a better design. For example supplement the existing SOC Low (threshold for loads) with a new SOC-Low-Export (threshold for export). That way I would set SOC Low-Export=60% and SOC-Low=20%…so battery could dump about 40% to grid (100% down to 60%) and then loads could be allowed to discharge another 40% from 60% to 20%.
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If there is another method I have overlooked that already achieves this I would love to know. Thank you.
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Cheers
Hi @dmc, regarding the issue you mentioned, please first disable the discharge time and then enable Pro mode to adjust the feed power. We believe this will help.
For instructions on how to enable Pro Mode, please click the link below for details.
Thanks to @SigiKa for your concern and assistance.
