Differences

This shows you the differences between two versions of the page.

--- battery_compatibility:byd_b-box [2019-02-12 21:33] – guystewart
+++ battery_compatibility:byd_b-box [2019-03-16 06:38] – guy_stewart
@@ Line 29: / Line 29: @@
-=== 1.2 A Venus-device is required, either Color Control GX (CCGX) or Venus GX (VGX) ===
+=== 1.2 A Venus-device is required, eg Color Control GX (CCGX), Venus GX (VGX), etc ===
-It is essential to use the CAN-bus connection of the CCGX or VGX with the BYD batteries for the keep-alive signal, communication of charge and discharge limits, error codes and state of charge.
+It is essential to use the CAN-bus connection of a [[venus-os:start|Venus-device]] with the BYD batteries for the keep-alive signal, communication of charge and discharge limits, error codes and state of charge.
-When used with B-Box batteries, the minimum required firmware version for the [[https://www.victronenergy.com/panel-systems-remote-monitoring/color-control|Color Control GX]] is v2.15. It is highly recommended to use the latest firmware version on all connected devices, including CCGX/VGX, Inverter/Charger and MPPTs. There are regular updates to improve performance and reliability.
+When used with B-Box batteries, the minimum required firmware version for the [[venus-os:start|Venus-device]] is v2.15. It is highly recommended to use the latest firmware version on all connected devices, including CCGX/VGX, Inverter/Charger and MPPTs. There are regular updates to improve performance and reliability.
 === 1.3 All 48V Multis, MultiPlusses, MultiGrids and Quattros are compatible ===
@@ Line 55: / Line 55: @@
 __MPPTs with a VE.Direct port__
-MPPTs are controlled via the [[venus-os:start|Venus-device]]. Make sure the [[venus-os:start|Venus-device]] runs v2.15 or later, and the MPPTs to 1.30 or the latest available version.
+MPPTs are controlled via the [[venus-os:start|Venus-device]]. Make sure the [[venus-os:start|Venus-device]] runs v2.15 or later, and the MPPTs to 1.39 or the latest available version.
 The MPPT requires connection to the [[venus-os:start|Venus-device]] to regulate charge currents as the batteries require (due to temperature, etc)
@@ Line 256: / Line 256: @@
 This parameters page is also a good place to check that all batteries are connected and working properly. In normal working conditions, for the 2.5 model, the current limit is 35A per cell. For example, 140A charge current limit ( 140 / 35 = 4 ) means there are 4 BYD battery cells connected.
+Note this figure has been increased in recent firmware versions - so it may appear slightly higher (eg 40A per cell).
 === Color Control GX Configuration ===
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 {{:battery_compatibility:byd-42v.jpeg?400|}}
-Also check that your are seeing the expected 35A of discharge current per installed module.
+Also check that your are seeing the expected 35-40 A of discharge current per installed module.
 Locally on-site, you can check the Run LED on the BYD BMU, it needs to be lit up continuously:
@@ Line 407: / Line 408: @@
 There has been a firmware revision for the BYD battery modules and BMU that improves cold weather performance slightly. This manual will be updated with the new (slightly improved) specifications when stock supplied with the new firmware has had sufficient time to enter the market. Contact your BYD distributor for further information about this.
+=== 10.4 Self-Startup from Low voltage shutdown modes ===
+In a correctly configured system, the inverter will shut itself down before the batteries enter a self protective shut down state.
+If your system is supplied only with AC-bus solar charging, this may prevent the solar inverter from starting up to recharge the batteries. Therefore it is strongly recommended that there is also either a generator or DC MPPT charge controller to provide DC bus power to bring the inverter back online to allow normal recharging to resume.
+Even a single 100/20 48V MPPT charger unit with 2 x 60 cell solar panels would be sufficient to add this self correcting mechanism able to maintain the DC bus voltage and improve longterm system reliability considerably from accidental deep discharge and subsequent shut down.
 ===== 11. Further Information =====
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 ===== DISQUS =====
 ~~DISQUS~~