# Export from DC-side PV stops when battery is full **URL:** \ **Category:** DIY\ **Tags:** domestic, parallel, cerbo\_gx, multiplus-ii, ess, diy\ **Created:** [19 February 2025 17:19 UTC](https://community.victronenergy.com/t/export-from-dc-side-pv-stops-when-battery-is-full/22749 "2025-02-19T17:19:34Z")\ **Posts on this page:** 1\ **Showing post:** 3
**Author:** ![wookey](https://avatars.discourse-cdn.com/v4/letter/w/7ba0ec/32.png) [@wookey](https://community.victronenergy.com/u/wookey)\ **Post date:** [20 February 2025 15:23 UTC](https://community.victronenergy.com/t/export-from-dc-side-pv-stops-when-battery-is-full/22749/3 "2025-02-20T15:23:29Z")
Right, I saw your posts on [ESS continous switching between charge/discharge when battery full and negative grid power - #21 by owenb79](https://community.victronenergy.com/t/ess-continous-switching-between-charge-discharge-when-battery-full-and-negative-grid-power/983/21) which is discussing a very similar issue. I did run for a while using the Multiplus SOC estimation and it is very innacurate, fairly quickly getting more than 10% off, although I take your point that what really matters is battery voltage so the MPII SOC estimation is not that important (and you can still _display_ the CAN-bus reported SOC level, even if the MPII is using its own estimated one). And it did seem to work fine in terms of charge-termination. I do prefer to have charge termination controlled by the BMS as that will turn down when _any_ cell gets near termination voltage, not just when the whole pack gets high enough. For a new, balanced, pack this doesn’t make any difference, but over time it seems that using DVCC _should_ give better results. (Optimum charge-termination algorithms is a big subject - see massive, but fascinating, thread here, for example: [GUIDE to properly Top-Balance and Charge a LFP Battery: Part 1 | DIY Solar Power Forum](https://diysolarforum.com/threads/guide-to-properly-top-balance-and-charge-a-lfp-battery-part-1.74070/) ) But I’m not totally averse to not using DVCC if there are advantages to doing it the other way. Last time I switched DVCC off the MPII had to reset which resulted in a power cut (and some corresponding device reprogramming) which was tiresome. Switching it on was fine. I’m not sure if it always does that, but it’s a disincentive to just testing. Should I be able to turn it on/off normally without a reset? I was struggling a little to interpret your charts on that thread. Are you saying that if one isn’t using DVCC, but charging/discharging controlled by the Multiplus/GX instead, then the ‘DC coupled PV - feed in excess’ works as as expected, and just automatically switches over? Then, of course, the question is ‘why’? --- _[View the full topic](https://community.victronenergy.com/t/export-from-dc-side-pv-stops-when-battery-is-full/22749)._