How is Time To Go calculated in VRM portal?

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luigi-miranda asked Jan 20, '23

How is Time To Go calculated in VRM portal?

My VRM portal is showing a SOC of 84.5% and Time To go shows only 17.5hrs (see below). I have 1,000 Ahr of Victron Lithium Smart batteries (5 x 200 A-hr in parallel), Lynx Smart BMS, Multiplus II, and Cerbo GX. My discharge current has been a steady 8 to 10 amps. With a discharge current of 10 amps, my calculation gives 84.5 hours to go (84.5% x 1,000 a-hr / 10 amps). Or if I assume a floor limit of say 20% SOC, that would give 64.5 hours to go. Still much higher than the 17.5 hrs shown in the portal.

How is Time to Go calculated? Is my calculation wrong?

VRM Lithium Battery SOC

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Answer 1 · 2023-01-20T23:59:55Z

snoobler answered · Jan 20, 2023 at 11:59 PM

Shunt settings. You specify a discharge floor (mine's 0%):

"time to go" is how long before you reach this discharge floor.

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luigi-miranda commented · Jan 21, 2023 at 10:20 AM

Ok. I use the Lynx Smart BMS that has its own shunt so I will check thise settings. Thanks!

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Answer 2 · 2023-01-21T06:41:28Z

klim8skeptic answered · Jan 21, 2023 at 06:41 AM

@snoobler The Lynx Smart BMS is a different beast, compared to a BMV / SmartShunt.

@Luigi Miranda Has the Lynx been set up correctly for your 1000Ah bank, and the correct # of paralleled batteries?

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luigi-miranda commented · Jan 21, 2023 at 10:22 AM

Yes, I have those settings correct. Thanks

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Stefanie (Victron Energy Staff) ♦♦ luigi-miranda commented · Jan 21, 2023 at 11:21 AM

Time remaining (time-to-go) in the Lynx Smart BMS is calculated by the set discharge floor.

What's the battery monitor set in your Cerbo (Settings > System setup > Battery monitor)?

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