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sungrow-hybrid: refactor hold battery mechanism

The previously used forced-mode does not allow charging the battery if enough solar is available.Instead, we should limit the battery max discharge power which effectively stops discharging but still allows for charging.This workaround is based on the HA script from here:https://github.com/mkaiser/Sungrow-SHx-Inverter-Modbus-Home-Assistant/blob/e8142fce09930a8b7c879ed18160f4e094b2a433/modbus_sungrow.yaml#L3315

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Lines changed: 21 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -186,12 +186,22 @@ render: \|`
`186`	`186`	`address: 13050 # Charge/discharge command`
`187`	`187`	`type: writesingle`
`188`	`188`	`decode: uint16`
	`189`	`+ # Reset max battery discharge power`
	`190`	`+ - source: const`
	`191`	`+ value: 1060 # 10.6kW, max allowed value for register`
	`192`	`+ set:`
	`193`	`+ source: modbus`
	`194`	`+ {{- include "modbus" . \| indent 10 }}`
	`195`	`+ register:`
	`196`	`+ address: 33047 # Battery max discharge power`
	`197`	`+ type: writesingle`
	`198`	`+ decode: uint16`
`189`	`199`	`- case: 2 # hold`
`190`	`200`	`set:`
`191`	`201`	`source: sequence`
`192`	`202`	`set:`
`193`	`203`	`- source: const`
`194`		`- value:2 #Forced mode (charge/discharge/stop)`
	`204`	`+ value:0 #Self-consumption mode (Default)`
`195`	`205`	`set:`
`196`	`206`	`source: modbus`
`197`	`207`	`{{- include "modbus" . \| indent 10 }}`
`@@ -208,6 +218,16 @@ render: \|`
`208`	`218`	`address: 13050 # Charge/discharge command`
`209`	`219`	`type: writesingle`
`210`	`220`	`decode: uint16`
	`221`	`+ # Set max battery discharge power, effectively stops discharging`
	`222`	`+ - source: const`
	`223`	`+ value: 1 # 0.01kW, min allowed value for register`
	`224`	`+ set:`
	`225`	`+ source: modbus`
	`226`	`+ {{- include "modbus" . \| indent 10 }}`
	`227`	`+ register:`
	`228`	`+ address: 33047 # Battery max discharge power`
	`229`	`+ type: writesingle`
	`230`	`+ decode: uint16`
`211`	`231`	`- case: 3 # charge`
`212`	`232`	`set:`
`213`	`233`	`source: sequence`

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