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LICENSE

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+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

README.md

@@ -1,10 +1,29 @@
-# SolarEdge Cloud API Exporter
+# SolarEdge Inverter Exporter
 
-## Configuration
+## Local Modbus/TCP Exporter
 
-Edit the script and put your API key, site id and inverter serial number
+Usage:
+```
+solaredge_modbus.py [-d] [-l LISTEN] [-p PORT] HOST [PORT]
+
+Prometheus exporter for SolarEdge inverters
+
+positional arguments:
+  HOST                  Inverter Network Address
+  PORT                  Inverter Modbus/TCP port (default: 1502)
+
+options:
+  -h, --help            show this help message and exit
+  -d, --debug           Enable debug info in HTTP answers (default: False)
+  -l LISTEN, --listen LISTEN
+                        Address to bind for the HTTP server (default: localhost)
+  -p PORT, --listen-port PORT
+                        Port of the HTTP server (default: 9150)
+```
+
+## Cloud API Exporter
+
+Edit the `solaredge_api` script and put your API key, site id and inverter serial number
 Edit the listening host and port if needed
 
-## Usage
 
-Run the script as a service, add the URL to prometheus.

dashboard/README.md

@@ -0,0 +1 @@
+Grafana dashboard configuration compatible with this exporter

prom.py

@@ -0,0 +1,57 @@
+#!/usr/bin/python3
+
+import bottle
+import datetime
+import logging
+from collections import defaultdict
+from sys import stderr
+
+
+def format_metrics(metric_data, entries, timestamps=False):
+    """ metric_data = { 'metric_name' : ('gauge'|'counter', 'description') 
+        entries = [ (datetime, 'metric_name', { 'attr': 'key' }, value) ]
+    """
+    
+    collected = defaultdict(list)
+    for entry in entries:
+        collected[entry[1]].append(entry)
+
+    for metric in collected:
+        md = metric_data.get(metric)
+        if md is not None:
+            yield "# TYPE {} {}\n".format(metric, md[0])
+            yield "# HELP {} {}\n".format(metric, md[1])
+
+        for (time, metric, attrs, value) in collected[metric]:
+            time_s = int(time.timestamp() * 1000)
+            attr_s = ""
+            if attrs:
+                attr_s = "{" + ','.join('{}="{}"'.format(k, attrs[k]) for k in attrs ) + "}"
+            if timestamps:
+                yield f"{metric} {attr_s} {value} {time_s}\n"
+            else:
+                yield f"{metric} {attr_s} {value}\n"
+
+def run(collect, metric_data, description='Mini Prometheus Exporter',
+        host='localhost', port=9150, timestamps=False, debug=False):
+
+    @bottle.route('/')
+    def root():
+        return description
+
+    @bottle.route('/metrics')
+    def metrics():
+        return format_metrics(metric_data, collect(), timestamps)
+
+    bottle.run(host=host, port=port, debug=debug)
+    
+if __name__ == "__main__":
+    def collect_dummy():
+        now = datetime.datetime.now()
+        yield (now, 'pi', {'one': '1', 'two': '2' }, 3.14)
+        yield (now, 'e', {'three': '3'}, 2.72)
+
+    metric_data = { 'pi': ['gauge', 'Pi value'],
+                    'e': ['counter', 'E counter'] }
+
+    run(collect_dummy, metric_data, port=9159)

solaredge.py

@@ -7,7 +7,7 @@ import requests
 from collections import defaultdict
 from sys import stderr
 
-api_key = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
+api_key = "ZYR991B0ZO9S530WW21B0RRNYBJGO482"
 site_id = 4143190
 
 inverter = '7B0E5700-E0'
@@ -78,13 +78,16 @@ def get_inverters():
 def energy(**kw):
     return get(f"site/{site_id}/energyDetails.json",
     kw | {"timeUnit": "QUARTER_OF_AN_HOUR"})
-11
+
 def tech_data(**kw):
-    return get(f"equipment/{site_id}/{inverter}/data.json", kw)
+    return get(f"equipment/{site_id}/{inverter}/data.json", kw | {"timeUnit": "QUARTER_OF_AN_HOUR"})
 
 def meters(**kw):
     return get(f"site/{site_id}/meters.json", kw | {"timeUnit": "QUARTER_OF_AN_HOUR"})
 
+def flow(**kw):
+    return get(f"site/{site_id}/currentPowerFlow.json", kw)
+
 def latest(method, timefn, **kw):
     name = method.__name__
     if name in cache and is_fresh(timefn(cache[name])):
@@ -131,6 +134,8 @@ def collect():
             yield (date, 'ac_active_power_watts', {'phase': p[1:2] }, phase.get('activePower'))
             yield (date, 'ac_reactive_power_watts', {'phase': p[1:2] }, phase.get('reactivePower'))
             yield (date, 'ac_cos_phi', {'phase': p[1:2] }, phase.get('cosPhi'))
+    else:
+        yield (datetime.datetime.now(), 'inverter_mode', {}, 1)
 
     for m in ms:
         point = m['values'][-1]

solaredge_api.py

@@ -0,0 +1,182 @@
+#!/usr/bin/python3
+
+import bottle
+import datetime
+import logging
+import requests
+from collections import defaultdict
+from sys import stderr
+
+api_key = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
+site_id = 4143190
+
+inverter = '7B0E5700-E0'
+
+listen = 'localhost'
+port = 9150
+
+endpoint = "https://monitoringapi.solaredge.com/"
+
+query_delta = datetime.timedelta(minutes=20)
+freshness_delta = datetime.timedelta(minutes=20)
+cache = {}
+
+numeric_modes = {
+    'OFF': 0,
+    'SLEEPING': 1,
+    'STARTING': 2,
+    'MPPT': 3,
+    'SHUTTING_DOWN': 4,
+    'FAULT': 5,
+    'STANDBY': 6,
+    'LOCKED': 7,
+}
+
+metric_data = {
+    "dc_voltage_volts": ["gauge", "Input bus voltage"],
+    "meter_energy_watthours_total": ["counter", "Power meter"],
+    "temperature_celsius": ["gauge", "Temperature"],
+    "inverter_mode": ["gauge", "Inverter state (0=off, 3=producing, 5=fault)"],
+    "ac_phase_volts": ["gauge", "Output bus phase voltage"],
+    "ac_current_amps": ["gauge", "Output bus current"],
+    "ac_voltage_volts": ["gauge", "Output bus voltage"],
+    'ac_frequency_hertz': ["gauge", "Output bus frequency"],
+    'ac_apparent_power_watts': ["gauge", "Apparent AC power"],
+    'ac_active_power_watts': ["gauge", "Active AC power"],
+    'ac_reactive_power_watts': ["gauge", "Reactive AC power"],
+    'ac_cos_phi': ["gauge", "AC Phase factor"] 
+}
+
+last_ts = {}
+
+def is_fresh(date):
+    return (datetime.datetime.now()) - date < freshness_delta
+
+def numeric_mode(s):
+    if s in numeric_modes:
+        return numeric_modes[s]
+    if s.startswith('LOCKED'):
+        return 7
+
+def time(t):
+    return t.strftime("%F %T")
+
+def ptime(s):
+    return datetime.datetime.strptime(s, "%Y-%m-%d %H:%M:%S")
+
+def get(path, params={}, **kw):
+    r = requests.get(endpoint + path, params | { "api_key": api_key }, **kw)
+    r.raise_for_status()
+    return r.json() | { 'fetch_time': datetime.datetime.now().timestamp() }
+    
+def details():
+    return get(f"site/{site_id}/details.json")
+
+def inventory():
+    return get(f"site/{site_id}/inventory.json")
+
+def get_inverters():
+    return [ i['SN'] for i in inventory()['Inventory']['inverters'] ]
+
+def energy(**kw):
+    return get(f"site/{site_id}/energyDetails.json",
+    kw | {"timeUnit": "QUARTER_OF_AN_HOUR"})
+
+def tech_data(**kw):
+    return get(f"equipment/{site_id}/{inverter}/data.json", kw | {"timeUnit": "QUARTER_OF_AN_HOUR"})
+
+def meters(**kw):
+    return get(f"site/{site_id}/meters.json", kw | {"timeUnit": "QUARTER_OF_AN_HOUR"})
+
+def flow(**kw):
+    return get(f"site/{site_id}/currentPowerFlow.json", kw)
+
+def latest(method, timefn, **kw):
+    name = method.__name__
+    if name in cache and is_fresh(timefn(cache[name])):
+        logging.info("Cache for {} is fresh", method.__name__)
+        return cache[name]
+
+    logging.info("Cache for {} is stale, requesting", method.__name__)
+    end = datetime.datetime.now()
+    start = end - query_delta
+    data = method(startTime=time(start), endTime=time(end), **kw)
+    cache[name] = data
+    return data
+
+def tech_check(c):
+        if c['data']['telemetries']:
+            return ptime(c['data']['telemetries'][-1]['date'])
+        else:
+            return datetime.datetime.fromtimestamp(c['fetch_time'])
+
+
+def meters_check(c):
+    return ptime(c['meterEnergyDetails']['meters'][0]['values'][-1]['date'])
+
+def collect():
+    tech = latest(tech_data, tech_check)['data']['telemetries']
+    ms = latest(meters, meters_check)['meterEnergyDetails']['meters']
+    if len(tech):
+        point = tech[-1]
+        date = ptime(point['date'])
+        yield (date, 'dc_voltage_volts', {}, point.get('dcVoltage'))
+        yield (date, 'meter_energy_watthours_total', {'meter': 'production'}, point.get('totalEnergy'))
+        yield (date, 'temperature_celsius', {}, point.get('temperature'))
+        yield (date, 'inverter_mode', {}, numeric_mode(point.get('inverterMode')))
+        yield (date, 'ac_phase_volts', {'phase':'1-2'}, point.get('vL1To2'))
+        yield (date, 'ac_phase_volts', {'phase':'2-3'}, point.get('vL2To3'))
+        yield (date, 'ac_phase_volts', {'phase':'3-1'}, point.get('vL3To1'))
+
+        for p in ('L1Data','L2Data','L3Data'):
+            phase = point[p]
+            yield (date, 'ac_current_amps', {'phase': p[1:2] }, phase.get('acCurrent'))
+            yield (date, 'ac_voltage_volts', {'phase': p[1:2] }, phase.get('acVoltage'))
+            yield (date, 'ac_frequency_hertz', {'phase': p[1:2] }, phase.get('acFrequency'))
+            yield (date, 'ac_apparent_power_watts', {'phase': p[1:2] }, phase.get('apparentPower'))
+            yield (date, 'ac_active_power_watts', {'phase': p[1:2] }, phase.get('activePower'))
+            yield (date, 'ac_reactive_power_watts', {'phase': p[1:2] }, phase.get('reactivePower'))
+            yield (date, 'ac_cos_phi', {'phase': p[1:2] }, phase.get('cosPhi'))
+    else:
+        yield (datetime.datetime.now(), 'inverter_mode', {}, 1)
+
+    for m in ms:
+        point = m['values'][-1]
+        date = ptime(point['date'])
+        yield (date, 'meter_energy_watthours_total', {'meter': m['meterType'].lower()}, point['value'])
+
+def format_metrics(entries, timestamps=False):
+    collected = defaultdict(list)
+    for entry in entries:
+        collected[entry[1]].append(entry)
+
+    for metric in collected:
+        md = metric_data.get(metric)
+        if md is not None:
+            yield "# TYPE {} {}\n".format(metric, md[0])
+            yield "# HELP {} {}\n".format(metric, md[1])
+
+        for (time, metric, attrs, value) in collected[metric]:
+            time_s = int(time.timestamp() * 1000)
+            attr_s = ""
+            if attrs:
+                attr_s = "{" + ','.join('{}="{}"'.format(k, attrs[k]) for k in attrs ) + "}"
+            if timestamps:
+                yield f"{metric} {attr_s} {value} {time_s}\n"
+            else:
+                yield f"{metric} {attr_s} {value}\n"
+
+@bottle.route('/')
+def root():
+    return "SolarEdge prometheus exporter"
+
+@bottle.route('/metrics')
+def metrics():
+    return format_metrics(collect())
+
+def main():
+    bottle.run(host=listen, port=port)
+
+
+if __name__ == '__main__':
+    main()

solaredge_modbus.py

@@ -0,0 +1,93 @@
+#!/usr/bin/env python3
+
+import argparse
+import datetime
+import prom
+import sunspec
+
+metric_data = {
+    "dc_voltage_volts": ["gauge", "Input bus voltage"],
+    "dc_current_amps": ["gauge", "Input bus current"],
+    "dc_power_watts": ["gauge", "Input bus power"],
+    "energy_watthours_total": ["counter", "Power meter total"],
+    "temperature_celsius": ["gauge", "Temperature"],
+    "inverter_status": ["gauge", "Inverter state (0=off, 3=producing, 5=fault)"],
+    "inverter_status_vendor": ["gauge", "Inverter vendor-specific fault code"],
+    "ac_current_amps": ["gauge", "Output bus current"],
+    "ac_voltage_volts": ["gauge", "Output bus voltage"],
+    'ac_frequency_hertz': ["gauge", "Output bus frequency"],
+    'ac_power_watts': ["gauge", "Active/Reactive/Apparent AC power"],
+    'ac_power_factor': ["gauge", "AC Phase factor"],
+    'meter_event': ["gauge", 'Power meter event']
+}
+
+def export(d, m):
+    yield ('dc_voltage_volts', {}, d.dc_voltage)
+    yield ('dc_current_amps', {}, d.dc_current)
+    yield ('dc_power_watts', {}, d.dc_power)
+    yield ('ac_current_amps', {'phase': 'a', 'meter': 'production'}, d.ac_current_a)
+    yield ('ac_current_amps', {'phase': 'b', 'meter': 'production'}, d.ac_current_b)
+    yield ('ac_current_amps', {'phase': 'c', 'meter': 'production'}, d.ac_current_c)
+    yield ('ac_power_watts', {'power': 'active', 'meter': 'production'}, d.ac_power)
+    yield ('ac_power_watts', {'power': 'reactive', 'meter': 'production'}, d.ac_apparent_power)
+    yield ('ac_power_watts', {'power': 'apparent', 'meter': 'production'}, d.ac_reactive_power)
+    yield ('energy_watthours_total', {'meter': 'production'}, d.ac_energy)
+    yield ('ac_voltage_volts', {'phase': 'ab', 'meter': 'production'}, d.ac_voltage_ab)
+    yield ('ac_voltage_volts', {'phase': 'bc', 'meter': 'production'}, d.ac_voltage_bc)
+    yield ('ac_voltage_volts', {'phase': 'ca', 'meter': 'production'}, d.ac_voltage_ca)
+    yield ('ac_frequency_hertz', {'meter': 'production'}, d.frequency)
+    yield ('inverter_status', {}, d.status_code)
+    yield ('inverter_status_vendor', {}, d.status_vendor)
+
+    for phase in ('a','b','c','total'):
+        yield ('ac_current_amps', {'phase': phase, 'meter': 'mains'}, m.ac_current[phase])
+        yield ('ac_power_watts',  {'phase': phase, 'meter': 'mains', 'power': 'active'}, m.ac_real_power[phase])
+        yield ('ac_power_watts',  {'phase': phase, 'meter': 'mains', 'power': 'reactive'}, m.ac_reactive_power[phase])
+        yield ('ac_power_watts',  {'phase': phase, 'meter': 'mains', 'power': 'apparent'}, m.ac_apparent_power[phase])
+    for phase in ('a', 'b', 'c', 'average'):
+        yield ('ac_power_factor', {'phase': phase, 'meter': 'mains'}, m.power_factor[phase])
+        yield ('ac_voltage_volts', {'phase': phase, 'meter': 'mains'}, m.ac_voltage[phase])
+    
+    for meter in ('import', 'export'):
+        yield ('energy_watthours_total', {'meter': meter}, m.energy_real[meter])
+
+    yield ('ac_frequency_hertz', {'meter': 'mains'}, m.frequency)
+    for event in m.events:
+        yield ('meter_event', {'event': event}, float(m.events[event]))
+
+
+
+def main():
+    
+    parser = argparse.ArgumentParser(prog='solaredge_modbus.py',
+        description='Prometheus exporter for SolarEdge inverters',
+        formatter_class=argparse.ArgumentDefaultsHelpFormatter)
+    parser.add_argument('-d', '--debug', action='store_true', help="Enable debug info in HTTP answers")
+    parser.add_argument('-l', '--listen', default='localhost', help="Address to bind for the HTTP server")
+    parser.add_argument('-p', '--listen-port', default='9150', help="Port of the HTTP server")
+    parser.add_argument('host', help="Network address of the inverter to monitor")
+    parser.add_argument('port', nargs='?', default=1502, help="Inverter Modbus/TCP port")
+
+    args = parser.parse_args()
+
+    inverter = sunspec.Inverter(host=args.host, port=args.port)
+
+    def collect():
+        date = datetime.datetime.now()
+
+        common = inverter.common_block()
+        inv = inverter.data()
+        meters = inverter.meter(0)
+
+        yield (date, 'firmware_version', {'version': common.version}, 1)
+        for (m,a,v) in export(inv, meters):
+            if v is not None:
+                yield (date,m,a,v)
+            
+        
+    prom.run(collect, metric_data, 'SolarEdge Modbus/TCP Exporter\n', 
+        host=args.bind, port=args.bind_port, debug=args.debug)
+
+
+if __name__ == '__main__':
+    main()

solaredge_modbus.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+cd $HOME
+. venv/bin/activate
+exec python3 solaredge_modbus.py solaredge

sunspec.py

@@ -0,0 +1,182 @@
+
+from pymodbus.client import ModbusTcpClient
+
+class ConnectionFailed(Exception): pass
+class InvalidAddress(Exception): pass
+
+class Registers:
+    def __init__(self, lower, count=1):
+        self.count = count
+        self.lower = lower
+        self.range = range(count)
+
+    def check_address(self, address):
+        if address not in self.range:
+            raise InvalidAddress(f"requested {address} for {self.range}")
+
+    def scale(self, value, scale):
+        if scale is None:
+            return value
+        return value * self.read_scale(scale)
+        
+    def read_uint16(self, address, scale=None):
+        self.check_address(address)
+        value = self.lower.getRegister(address)
+        return self.scale(value, scale)
+
+    def read_int16(self, address, scale=None):
+        value = self.read_uint16(address)
+        if value & 0x8000:
+            value = value - 0x10000 
+        return self.scale(value, scale)
+
+    def read_uint32(self, address, scale=None):
+        value = self.read_uint16(address) * 65536 + self.read_uint16(address + 1)
+        return self.scale(value, scale)
+
+    def read_bytes(self, address, length):
+        string = bytearray(length)
+        for n in range(length//2):
+            nibble = self.read_uint16(address + n)
+            string[2*n]   = nibble >> 8
+            string[2*n+1] = nibble & 0xFF
+        return bytes(string).split(b'\x00', 1)[0]
+
+    def read_scale(self, address):
+        return 10 ** self.read_int16(address)
+
+class Header:
+    def __init__(self, regs, base):
+        self.did = regs.read_uint16(0)
+        self.len = regs.read_uint16(1)
+        self.base = base
+        self.end = base + self.len
+
+    def __str__(self):
+        return f"SunSpec(DID={self.did}, [{self.base}:{self.end}]"
+
+class CommonBlock:
+    def __init__(self, regs):
+        self.did = regs.read_uint16(0)
+        self.info_len = regs.read_uint16(1)
+        self.manufacturer = regs.read_bytes(2, 32)
+        self.model = regs.read_bytes(18, 32)
+        self.version = '.'.join(s.lstrip('0') for s in regs.read_bytes(42, 16).decode('ascii').split('.'))
+        self.serial = regs.read_bytes(50, 32)
+        self.device = regs.read_uint16(66)
+        
+meter_events_bits = { 2: 'Power Failure',
+                      3: 'Under Voltage',
+                      4: 'Low PF',
+                      5: 'Over Current',
+                      6: 'Over Voltage',
+                      7: 'Missing Sensor' }
+                 
+
+class Meter:
+    def __init__(self, regs):
+        blocks16 = (('ac_current', 0, ('total', 'a', 'b', 'c'), 0.1),
+                    ('ac_voltage', 5, ('average', 'a', 'b', 'c',
+                                       'll', 'ab', 'bc', 'ca'), 1),
+                    ('ac_real_power', 16, ('total', 'a', 'b', 'c'), 0.1),
+                    ('ac_apparent_power', 21, ('total', 'a', 'b', 'c'), 0.1),
+                    ('ac_reactive_power', 26, ('total', 'a', 'b', 'c'), 0.1),
+                    ('power_factor', 31, ('average', 'a', 'b', 'c'), 1))
+
+        quadrants = ['_'.join((k,q,p)) for (k, qs) in (
+                                            ('import', ('1','2')),
+                                            ('export', ('3','4'))
+                                       )
+                                       for q in qs
+                                       for p in ['total', 'a', 'b', 'c']]
+        
+        blocks32 = (('energy_real', 36, ('export', 'ex_a', 'ex_b', 'ex_c',
+                                         'import', 'im_a', 'im_b', 'im_c')),
+                    ('energy_apparent', 53, ('export', 'ex_a', 'ex_b', 'ex_c',
+                                            'import', 'im_a', 'im_b', 'im_c')),
+                    ('energy_reactive', 70, quadrants))
+
+
+        for (metric, offset, labels, fix) in blocks16:
+            data = {}
+            scale = regs.read_scale(offset + len(labels)) * fix
+            for (i, key) in enumerate(labels):
+                data[key] = regs.read_int16(offset + i) * scale
+            self.__dict__[metric] = data
+                
+        for (metric, offset, labels) in blocks32:
+            data = {}
+            scale = regs.read_scale(offset + len(labels)*2)
+            for (i, key) in enumerate(labels):
+                value = regs.read_uint32(offset + 2*i) * scale / 10
+                data[key] = value if value > 1 else None
+            self.__dict__[metric] = data
+
+        self.frequency = regs.read_int16(14, scale=15)
+
+        event_bits = regs.read_uint32(103)
+        self.events = {}
+        for bit in meter_events_bits:
+            self.events[meter_events_bits[bit]] = bool(event_bits & (1 << bit))
+        
+
+status_codes = [None, 'off', 'sleep', 'start', 'on', 'throttled', 'stop', 'fault', 'setup']
+
+class InverterBlock:
+    def __init__(self, regs):
+        current_scale = regs.read_scale(6)
+        self.ac_current = current_scale * regs.read_uint16(2)
+        self.ac_current_a = current_scale * regs.read_uint16(3)
+        self.ac_current_b = current_scale * regs.read_uint16(4)
+        self.ac_current_c = current_scale * regs.read_uint16(5)
+
+        voltage_scale = regs.read_scale(13)
+        self.ac_voltage_ab = voltage_scale * regs.read_uint16(7)
+        self.ac_voltage_bc = voltage_scale * regs.read_uint16(8)
+        self.ac_voltage_ca = voltage_scale * regs.read_uint16(9)
+
+        self.ac_power = regs.read_int16(14, scale=15)
+        self.frequency = regs.read_int16(16, scale=17)
+        self.ac_apparent_power = regs.read_int16(18, scale=19)
+        self.ac_reactive_power = regs.read_int16(20, scale=21)
+
+        self.power_factor = regs.read_int16(22, scale=23)
+        self.dc_current = regs.read_uint16(27, scale=28)
+        self.dc_voltage = regs.read_uint16(29, scale=30)
+        self.dc_power = regs.read_int16(31, scale=32)
+        self.temperature = regs.read_int16(34, scale=37)
+        self.status_code = regs.read_uint16(38)
+        self.status = status_codes[self.status_code]
+        self.status_vendor = regs.read_uint16(39)
+
+        ac_energy = regs.read_uint32(24, scale=26)
+        self.ac_energy = ac_energy if ac_energy > 1 else None
+
+class Inverter:
+    def __init__(self, host, port=1502, device=1):
+        self._conn = ModbusTcpClient(host, port)
+        self._device = 1
+        
+    def connect(self):
+        if not self._conn.connect():
+            raise ConnectionFailed()
+
+    def registers(self, addr, length, device=None):
+        if device is None:
+            device = self._device
+        self.connect()
+        rs = self._conn.read_holding_registers(addr, length, slave=device)
+        return Registers(rs, length)
+
+    def header(self, base):
+        return Header(self.registers(base, 2), base)
+
+    def common_block(self):
+        return CommonBlock(self.registers(40002, 67))
+
+    def data(self):
+        return InverterBlock(self.registers(40069, 40))
+
+    def meter(self, n):
+        base = 40190 + 174*n
+        return Meter(self.registers(base, 105))