Hoymiles · HiBattery · Plug-in battery
4.02 to 16.08 kWh (expansion on request) · 4 × 1,000 W PV · 800 W plug-and-play
The HiBattery 4020 X combines a 4.02 kWh LFP battery, an inverter and four MPP trackers in one enclosure. Up to eight modules can be connected, with 1,000 W per input, and the HB-4020-X delivers 800 W on the grid side. With up to three expansion packs HB-4020-S (available from PVSelected on request), the storage capacity grows to 16.08 kWh, and an off-grid port supplies up to 2,500 W during a grid outage.
Certificates for the unit
Test seals and manufacturer awards
In brief
The Hoymiles HiBattery 4020 X (HB-4020-X) is a battery storage system with integrated inverter and four MPP trackers: an LFP battery with 4.02 kWh, up to 4 × 1,000 W PV input and 800 W on the grid side, ready to plug into a household socket with the supplied MS plug-and-play cable. A second, grid-independent port supplies up to 2,500 W during a grid outage. With up to three expansion packs HB-4020-S (available from PVSelected on request), it grows to 16.08 kWh. In our assessment, the German special rule for plug-in solar devices (§ 8(5a) EEG) no longer applies above 2 kW of installed module power (as of 09/2026, not legal advice).
PVSelected lists the HB-4020-X in its B2B shop as a single unit (item C220200003) and as a pallet of 12 units (C220200003P). Prices and availability are shown after you log in.
PVSelected supplies installers in Germany, Austria, Switzerland and the Netherlands. Warehouse: Halskestraße 3-5, 47877 Willich.
Why this battery
More modules than usual on one unit, plugging in instead of rewiring, power during grid outages and a battery that grows with demand. Six arguments for your customer conversations.
The HiBattery 4020 X has four PV inputs, each with its own MPP tracker. Each input accepts up to 1,000 W, 60 V and 32 A input current, and the short-circuit current may reach 40 A. With a PV Y-branch cable, two modules run in parallel on one input, so up to eight modules fit on one unit.
Do not connect modules in series, and do not connect the connectors of one module to different inputs. Y-branch cables and DC extension cables are not included. MPPT range 16 to 60 V, start from 18 V.
For your customers: Modules with different orientations run on separate trackers and are each optimized individually.
4 × 1,000 WPV input power on four MPP trackers
The HB-4020-X is factory-set to deliver 800 W on the grid side. The supplied MS plug-and-play cable goes into the on-grid port and into the socket. Alternatively, the cable can be connected in the distribution board, single-phase or to one phase of a three-phase distribution board; according to the manual, only a qualified electrician may do this.
Hoymiles states 2,500 W on the grid side for the HB-4020-XM variant and, in its own shop, for a fixed connection by a qualified electrician with activation in the app (manufacturer information, not in the datasheet). The unit certificate lists the HB-4020-X with 800 VA, 2,500 VA only for the HB-4020-XM; clarify the required certificate with the grid operator in advance. PVSelected stocks the HB-4020-X.
For your customers: The plug-and-play basic installation requires no work on the house distribution board; for registration in Germany, see Legal situation.
800 Wgrid side, factory setting
The grid-independent port supplies up to 2,500 W at 230 V. It is activated on the unit: press and hold the off-grid button for at least 2 seconds. A local load or a microinverter can be connected.
This is not a backup power supply for the house grid: only what is plugged into the off-grid port is supplied. Neither the datasheet nor the manual states a switchover time, and the scope of delivery does not list a cable for this port.
For your customers: A fridge or router keeps running during a power outage if it is connected to the off-grid port with a suitable cable (not included).
2,500 WOff-grid port, 230 V
Up to three expansion packs HB-4020-S with 4.02 kWh each are stacked under the unit and screwed together at the sides. The maximum charging power increases with each pack, up to 6,500 W with three packs; according to the manual (X/XM), the maximum battery discharging power is 2,500 W from one pack onward. On the grid side, the HB-4020-X still delivers 800 W max., 2,500 W only at the off-grid port or with the XM variant.
The expansion pack HB-4020-S is not listed in the B2B shop; we will clarify availability on request. Stack only when unwired and switched off.
For your customers: Start with one unit and expand the capacity later with packs.
16.08 kWhwith three expansion packs
The Hoymiles BMS monitors the battery with 48 integrated protection functions, balances the cells and balances at pack level via a DC/DC converter. In addition, there is a built-in aerosol fire suppression system, a pressure relief valve and over-temperature protection at the DC terminals.
Cells: LiFePO4 with 314 Ah. Below 0 °C, a heating film automatically brings the unit into the charging temperature range.
For your customers: LFP cells, fire suppression and pressure relief in the enclosure support installation indoors.
48protection functions in the BMS
The battery is set up in the S-Miles Home app: self-consumption or TOU mode based on electricity prices, up to seven load power curves (one per day) and the output power via slider. For consumption-based control, the app pairs a Hoymiles meter or Shelly and Everhome devices; via the open MQTT protocol, you can integrate energy management systems from other providers.
Up to five Shelly devices and one smart meter per system, by default on the grid side. Connection via Bluetooth and 2.4 GHz Wi-Fi.
For your customers: The battery can be integrated into existing smart home and metering equipment.
MQTTopen protocol for third-party EMS
Variants
Hoymiles builds the HiBattery 4020 range in four base models (HB-4020-X, HB-4020-XM, HB-4020-AC, HB-4020-ACM) plus the expansion pack HB-4020-S. PVSelected stocks the HB-4020-X; the other variants are listed here for reference.
| Model | Coupling | PV input | Grid side | Off-grid | Capacity | Dimensions W × H × D | Weight | At PVSelected |
|---|---|---|---|---|---|---|---|---|
| HB-4020-X | DC | 4 MPPT, 4 × 1,000 W | 800 W | 2,500 W | 4.02 kWh | 520 × 384 × 199 mm | 42 kg | yes, single units and pallets |
| HB-4020-XM | DC | 4 MPPT, 4 × 1,000 W | 2,500 W | 2,500 W | 4.02 kWh | 520 × 384 × 199 mm | 42 kg | no |
| HB-4020-AC | AC | no PV input | 800 W | 2,500 W | 4.02 kWh | 520 × 384 × 199 mm | 42 kg | no |
| HB-4020-ACM | AC | no PV input | 2,500 W | 2,500 W | 4.02 kWh | 520 × 384 × 199 mm | 42 kg | no |
| HB-4020-S | Expansion pack | – | – | – | 4.02 kWh | 520 × 275 × 199 mm | 35 kg | on request |
According to the datasheet, the battery data of HB-4020-X, HB-4020-XM, HB-4020-AC and HB-4020-ACM are identical: LFP, 314 Ah, 4.02 kWh, 2,000 W charging and discharging. HB-4020-AC and HB-4020-ACM are AC-coupled without PV input and intended for existing systems. The VDE-AR-N 4105 unit certificate and the EU test certificates list all 16 model designations (base models with -1, -2, -3 for one to three packs).
Battery storage with integrated inverter, 4.02 kWh, 800 W on the grid side. Supplied in the box with the MS plug-and-play cable, disconnect tool, manual and wall brackets.
12 units on one pallet for installers who keep stock or run several projects.
4.02 kWh, 520 × 275 × 199 mm, 35 kg, up to three packs per unit. Not listed in the B2B shop, availability on request.
Expansion stages
The images are shown at the same scale. The unit sits on top, with up to three expansion packs below. Charging power and capacity according to the manual, weight and height as calculated values from the datasheet, without clearances and feet.
| Feature | HB-4020-X | HB-4020-X-1 | HB-4020-X-2 | HB-4020-X-3 |
|---|---|---|---|---|
| Expansion packs | 0 | 1 | 2 | 3 |
| Capacity | 4.02 kWh | 8.04 kWh | 12.06 kWh | 16.08 kWh |
| Usable (calculated value) | 3.62 kWh | 7.24 kWh | 10.86 kWh | 14.48 kWh |
| Max. charging power | 2,000 W | 4,000 W | 6,000 W | 6,500 W |
| Max. battery discharging power ¹ | 2,000 W | 2,500 W | 2,500 W | 2,500 W |
| Weight (calculated value) | 42 kg | 77 kg | 112 kg | 147 kg |
| Stack height (calculated value) | 384 mm | 659 mm | 934 mm | 1,209 mm |
¹ Battery discharging power according to the manual (table for X and XM); on the grid side, the HB-4020-X still delivers 800 W max., 2,500 W only at the off-grid port or with the XM variant. Usable energy: 3.62 kWh per unit at 90 % depth of discharge according to the warranty terms, multiplied by the number of units (calculated value; Hoymiles does not state a system value). Weight 42 kg for the unit plus 35 kg per pack, height 384 mm plus 275 mm per pack (calculated values).
Expansion and module check
Choose the expansion stage and enter the input assignment and module data. The check shows capacity, power and weight, verifies the limits per input and creates the parts list for your request.
Example values; please take them from your module datasheet
Limits per input according to the datasheet: 60 V input voltage, 40 A short-circuit current, 32 A input current, 1,000 W; max. 8 modules per unit, two modules in parallel via Y-cable, never in series. Enter the open-circuit voltage at the lowest temperature from the module datasheet; the check does not apply a temperature correction. It does not replace system planning.
Your system
HB-4020-XUnit without expansion pack
¹ Battery discharging power according to the manual (X/XM). On the grid side, the HB-4020-X delivers 800 W max., 2,500 W only at the off-grid port or with the XM variant.
Module check per input
Parts list
Limits per input according to the datasheet: 60 V input voltage, 40 A short-circuit current, 32 A input current, 1,000 W; max. 8 modules per unit, two modules in parallel via Y-cable, never in series. Enter the open-circuit voltage at the lowest temperature from the module datasheet; the check does not apply a temperature correction. It does not replace system planning.
Legal situation · as of 09/2026
An assessment of German law for installers, not legal advice. The linked statutory texts (in German) and the requirements of the responsible grid operator are authoritative; assessments by the German consumer advice centers (Verbraucherzentralen) are marked as secondary sources.
As of: 26.09.2026. Assessment of the legal situation in Germany, not legal advice.
§ 8(5a) of the German Renewable Energy Sources Act (EEG) allows the simplified connection of plug-in solar devices with a total of up to 2 kW installed power and up to 800 VA inverter power downstream of a final consumer's withdrawal point. The definition in § 3 no. 43 EEG names the solar system, inverter, connection cable and plug; it does not mention a battery.
The HiBattery 4020 X accepts up to 4 × 1,000 W of PV. If the installed module power exceeds 2 kW or 2,500 W is used on the grid side (XM variant, fixed connection), the limits of the special rule are exceeded in our assessment; the grid operator's regular connection rules then apply. Have this checked on a case-by-case basis.
According to the manual, only a qualified electrician may carry out the connection in the distribution board. Apart from the grid operator, only installation companies registered in a grid operator's installer register may work on the electrical installation downstream of the main service fuse (§ 13(2) of the German Low Voltage Connection Ordinance, NAV).
According to the DKE, the German product standard for plug-in solar devices does not cover devices with energy storage; additional requirements apply to them, and a further part of the standard is planned. For the grid connection of the 4020 X, a unit certificate according to VDE-AR-N 4105 from TÜV NORD is available, with a restriction (see Certificates).
In the Marktstammdatenregister (MaStR, the German market master data register), the PV system and the battery storage must be registered as two units, for balcony solar systems in one process (MaStR help pages), within one month of commissioning (§ 5(5) MaStRV). Under § 19(3) NAV, the grid operator must be notified before an own generating installation is set up, and its connection must be coordinated with the grid operator. Whether this applies to a battery on a plug-in solar device, and whether an electrician must register it, has not been conclusively clarified: the Federation of German Consumer Organisations (vzbv) says yes (assessment, secondary source, as of 06.03.2026), while the Verbraucherzentrale Niedersachsen (secondary source, as of 01.07.2026) only mentions the Marktstammdatenregister. Clarify the procedure with the responsible grid operator.
National rules differ. We coordinate them with you and the responsible grid operator and provide the manufacturer documents.
Installation and connection
Installation, connection and commissioning according to the user manual REV1.2. This lets you plan materials and scheduling before the van leaves the yard.
Install indoors or in a protected location: the manual requires protection from direct sunlight and rain, and the warranty terms exclude locations with direct sun, rain or snow, even though the enclosure is rated IP66. Unit and packs are stacked, joined at the sides with M4 screws and secured to the wall with brackets (drilling depth at least 50 mm, M6 expansion screws, M5 screws).
42 kg per unit and 35 kg per pack: lift using the carrying handles and with at least two people. We consider the minimum clearance stated in the manual to be a misprint and are clarifying it with Hoymiles; plan free space for cables and maintenance.
Only by a qualified electrician: cut off the plug of the MS cable, strip the wires and connect single-phase to L, N and PE or to one phase of a three-phase distribution board. Beforehand, switch off the circuit breaker, verify the absence of voltage with a multimeter and wear insulating gloves.
Protection class I; the protective earth runs via the MS cable. Hoymiles recommends a residual current device (RCD) or RCM type A on the feed-in side. Before working on the unit, wait at least 5 minutes after disconnecting all sources.
Scope of delivery HB-4020-X: unit, MS plug-and-play cable, disconnect tool, user manual, 2 brackets, 2 M6 expansion screws, 2 M5 screws. Not included: DC extension cables and PV Y-branch cables; the manual does not list a cable for the off-grid port. We will clarify both with your order.
Safety
Four levels of protection according to the datasheet: battery management, balancing, fire suppression and pressure relief.
The BMS monitors voltage, current and temperature and balances the cells; between the unit and the expansion packs, a DC/DC converter balances at pack level. If the cell protection limits are exceeded, the BMS locks the unit; only Hoymiles technical support can unlock it, and the request is handled via us.
An aerosol fire suppression system is built into the enclosure. The animation shows the principle.
Manufacturer animation, no sound
A pressure relief valve on the side of the unit releases overpressure, and the DC terminals are protected against over-temperature.
Cells LiFePO4, 314 Ah, ≥ 8,000 cycles at 70 % SOH. Below 0 °C, the heating film activates automatically. BMS lock and unlocking according to the manual.
App and energy management
Setup and operation run via the S-Miles Home app for iOS and Android; an LED display on the unit shows the status. Protection settings are not read or set on the unit.
We will agree with you which Hoymiles meter suits your system, for example for zero export.
Application examples
Manufacturer images from a covered loggia, a living area and of three expansion stages. The battery is installed protected from direct sun and rain, as required by the manual.
Manufacturer
The HiBattery 4020 X is made by Hoymiles Power Electronics Inc., based in Hangzhou. Warranty service for Europe is managed by Hoymiles Service EU in Eindhoven, and warranty claims are handled via the distributor. For energy storage, BloombergNEF lists Hoymiles as a Tier 1 manufacturer in Q2 2026.
Technical data
Values from the Hoymiles datasheet REV1.1, consistent with the user manual REV1.2; deviations are noted in the footnotes.
| Inputs / MPP trackers | 4 / 4 |
|---|---|
| Max. number of PV modules | 8 |
| Max. input power | 4 × 1,000 W |
| Max. input voltage | 60 V |
| Max. input current | 4 × 32 A |
| Max. short-circuit current | 4 × 40 A |
| Start-up voltage min. / max. | 18 / 60 V |
| MPPT voltage range | 16 to 60 V |
| Connectors | MC4 |
| Rated output power | X 800 W · XM 2,500 W |
|---|---|
| Rated output current | X 3.48 A · XM 10.87 A |
| Max. output power | X 800 W · XM 2,500 W ¹ |
| Max. input power (charging from the grid) | 2,500 W, 10.87 A |
| Rated voltage | 230 V (180 to 270 V), L/N/PE |
| Frequency | 50 Hz (45 to 55 Hz) |
| Power factor | > 0.99, adjustable from 0.8 leading to 0.8 lagging |
| Harmonic distortion THD | < 3 % |
| Max. output power | 2,500 W |
|---|---|
| Rated voltage, frequency | 230 V, 50 Hz |
| Max. output current | 10.87 A |
| Max. input power | 2,500 W, 10.87 A |
| Power factor | > 0.99, adjustable from 0.8 leading to 0.8 lagging |
| Activation | off-grid button, at least 2 s |
| Battery type | LFP (LiFePO4) |
|---|---|
| Cycles | ≥ 8,000 at 70 % SOH |
| Rated capacity | 314 Ah |
| Rated energy | 4,020 Wh |
| Usable energy | 3.62 kWh at 90 % depth of discharge ² |
| Rated voltage | 12.8 V |
| Charge/discharge temperature | -20 to 55 °C |
| Charge/discharge power | 2,000 W rated and max. |
| DC/DC voltage | 48 V |
| Max. DC/AC efficiency | 96.5 % |
| Round-trip efficiency | not specified |
| Dimensions W × H × D | 520 × 384 × 199 mm |
|---|---|
| Weight | 42 kg |
| Operating temperature | -20 to 55 °C ³ |
| Storage temperature | -30 to 60 °C |
| Humidity, altitude | 5 to 100 %, up to 4,000 m |
| Noise | < 20 dB |
| Cooling | natural convection |
| Ingress protection | IP66 ⁴ |
| Topology, protection class | isolated, protection class I |
| Display | LED status display, settings via app |
| Communication | Bluetooth, 2.4 GHz Wi-Fi ⁵ |
| App | S-Miles Home |
| Warranty | 10 years |
| Battery | LFP, 314 Ah, 4,020 Wh, ≥ 8,000 cycles at 70 % SOH |
|---|---|
| Rated voltage | 12.8 V (11.2 to 14.6 V) |
| Charge/discharge power | 2,000 W rated and max. |
| Dimensions W × H × D | 520 × 275 × 199 mm |
| Weight | 35 kg |
| Operating temperature, ingress protection | -20 to 55 °C, IP66 |
| Warranty | 10 years |
| At PVSelected | on request, not in the B2B shop |
¹ The user manual REV1.2 combines X and XM in one column (rated 800 W, max. 2,500 W). For the HB-4020-X, the datasheet and certificates are authoritative: 800 W. ² According to the warranty terms. ³ The TÜV NORD certificate states a power reduction above 40 °C, the datasheet does not. ⁴ Despite IP66, protect from direct sun and rain (manual, warranty terms). ⁵ The unit also has an RS-485 port (manual, product overview); Hoymiles does not describe its function.
As of: Hoymiles datasheet HiBattery 4020 X REV1.1 (04/2026), user manual REV1.2 (08/2026).
Hoymiles datasheet REV1.1 in English, including the pages on the expansion pack HB-4020-S. PDF.
Download datasheet as PDFCertificates
Which test certificates are available for the HiBattery 4020 X, what they cover and which warranty Hoymiles provides. You can download the certificates above in the technical data section.
| Certificate | Standards | Test body | Reg. no. | Date |
|---|---|---|---|---|
| Grid connection | VDE-AR-N 4105:2018-11, DIN VDE V 0124-100:2020-06; unit certificate with restriction ¹ | TÜV NORD CERT | 4479823053476 | 29.04.2026 |
| Device safety | IEC 62109-1/-2, IEC 62477-1 | TÜV NORD CERT | 44 799 26 406749 - 210 | 05.06.2026 |
| EMC | Directive 2014/30/EU, EN IEC 61000-6-1 to -4, IEC 62920 | TÜV NORD (Taiwan) | NE1105260109 | 18.05.2026, valid until 17.05.2031 |
| Radio, cybersecurity | Radio Equipment Directive Art. 3(3)(d) and (e), EN 18031-1/-2 | DEKRA, Notified Body 1909 | 86866RNB.001 | 03.06.2026 |
| EU conformity | 2014/53/EU, 2011/65/EU, (EU) 2015/863, (EU) 2023/1542 | Manufacturer's declaration | – | Manual REV1.2 |
| Further standards (manufacturer) | IEC 62619, EN 300 328, EN 301 489-1/-17, EN 62311 | Hoymiles website | Certificate not available to us | – |
¹ For installers: monitoring of the active power PAV,E is not integrated in the unit and can be implemented as a separate device in accordance with VDE-AR-N 4105 section 5.5.2. As the unit has no display for the protection settings, a read-out function must be implemented at the generating plant. The certificate applies to all 16 model designations of the range.
The IEC and EMC certificates assess samples, not ongoing production. The RED certificate covers the cybersecurity requirements; Hoymiles declares the other requirements of the Radio Equipment Directive in the declaration of conformity.
According to the document, the terms apply to the HB-4020-X, the HB-4020-AC and the expansion pack HB-4020-S in Europe.
Your benefits
Everything you need to make your PV business more efficient, more profitable and more reliable.
Attractive wholesale prices, volume discounts and transparent availability, directly in your personal B2B shop.
From the initial consultation to commissioning. As the distributor, we handle warranty claims directly with Hoymiles.
Practical training in the PVSelected Academy: product knowledge, installation, sales and commissioning.
No call center, no ticket system. One dedicated contact person who knows your projects and requirements.
Your own online access with real-time stock levels, individual prices, order history and easy reordering.
We deliver the HiBattery 4020 X as single units or as a pallet of 12, directly to the job site or to your warehouse.
Support with module assignment, expansion stage and accessories, so that the system fits at the first appointment.
We compile the unit certificate, datasheet and manual for your registration. We request anything missing from Hoymiles.
We supply installers and trade partners exclusively, so we never compete with you for your own orders.
It's that simple
No paperwork, no long waiting times. From request to delivery from our Willich warehouse.
Expansion stage, module assignment and quantity via the form. The expansion and module check above gives you the values.
Your personal contact gets back to you within 24 hours with the price for a single unit or pallet, the availability of the expansion packs and suitable accessories.
Stock items usually reach you within 24 to 48 hours, at your warehouse or directly on site, together with the datasheet, manual and certificates.
Frequently asked questions
Answers from the datasheet, user manual, certificates and warranty terms. Your question is not listed? Call us at +49 2154 5029131 or submit a request.
HB-4020-X and HB-4020-XM are DC-coupled with four PV inputs and four MPP trackers; the X delivers 800 W on the grid side, the XM 2,500 W. HB-4020-AC and HB-4020-ACM have no PV input and are intended for existing systems, also with 800 W or 2,500 W. All four have the same LFP battery with 4.02 kWh and an off-grid port with 2,500 W. HB-4020-S is the expansion pack with 4.02 kWh, 520 × 275 × 199 mm and 35 kg.
We stock the HB-4020-X with 800 W on the grid side, as a single unit (item C220200003) and as a pallet of 12 units (C220200003P). HB-4020-XM, HB-4020-AC and HB-4020-ACM are not in the B2B shop; please request the expansion pack HB-4020-S from us.
According to the datasheet and certificates, the HB-4020-X feeds 800 W into the grid. Hoymiles states 2,500 W on the grid side for the XM variant and, in its own shop, for a fixed connection by a qualified electrician with activation in the app (manufacturer information, not in the datasheet). The unit certificate lists the HB-4020-X with 800 VA, 2,500 VA only for the HB-4020-XM; clarify the required certificate with the grid operator in advance. According to the manual, only a qualified electrician may carry out the connection in the distribution board; in Germany, only a registered installation company may work downstream of the main service fuse (§ 13(2) NAV). The 2,500 W at the off-grid port only concern the loads connected there.
In Germany, the special rule for plug-in solar devices in § 8(5a) EEG applies up to 2 kW of installed power and 800 VA of inverter power. The 4020 X accepts up to 4 × 1,000 W of PV; with more than 2 kW of module power, the special rule is exceeded in our assessment, and the grid operator's regular connection rules then apply. As of 09/2026, assessment of German law, not legal advice.
In Germany, yes: in the Marktstammdatenregister (MaStR) as a separate unit alongside the PV system, for balcony solar systems in the same process, within one month of commissioning (§ 5(5) MaStRV). Whether an additional registration with the grid operator by an electrician is required has not been conclusively clarified: § 19(3) NAV requires notification before an own generating installation is set up, and the German consumer advice centers assess the battery case differently (federal association vzbv, as of 06.03.2026: yes). Clarify this with the responsible grid operator. As of 09/2026, not legal advice.
According to the DKE, the German product standard for plug-in solar devices does not cover devices with energy storage; a further part of the standard is planned. We therefore do not claim conformity with this standard. For the grid connection, a unit certificate according to VDE-AR-N 4105 from TÜV NORD is available (reg. no. 4479823053476), with a restriction regarding power monitoring.
It has a grid-independent port with up to 2,500 W at 230 V, activated with the off-grid button (press and hold for at least 2 seconds). Only the load or microinverter connected there is supplied, not the house grid. Neither the datasheet nor the manual states a switchover time.
Up to eight modules: per input, one directly or two in parallel via a PV Y-branch cable, never in series. Per input, the limits are 60 V input voltage, 32 A input current, 40 A short-circuit current and 1,000 W; the MPPT range is 16 to 60 V, start from 18 V. Check the open-circuit voltage at the lowest temperature on site, for example with our module check.
With up to three expansion packs HB-4020-S to 8.04, 12.06 or 16.08 kWh. The maximum charging power rises to 4,000, 6,000 and 6,500 W, and according to the manual (X/XM), the maximum battery discharging power rises to 2,500 W from one pack onward. On the grid side, the HB-4020-X still delivers 800 W max., 2,500 W only at the off-grid port or with the XM variant. The pack is not listed in the B2B shop; please request it.
The enclosure is rated IP66, but the manual still requires protection from direct sunlight and rain, and the warranty terms exclude locations with direct sun, rain or snow. We recommend installation indoors, for example in a utility room or basement, within the operating range of -20 to 55 °C.
The 4020 X works with Hoymiles meters as well as Shelly and Everhome devices; up to five Shelly devices and one smart meter are possible per system, by default on the grid side. For zero export, Hoymiles names the Hoymiles Smart Meter in its own shop; we will agree with you which model suits your system.
10 years of product warranty and a performance warranty of at least 70 % of the 4.02 kWh or 27.2224 MWh throughput, whichever occurs first. The warranty starts with installation, at the latest 4 months after shipment by Hoymiles; installation must take place within 6 months of the invoice date. Warranty claims go from the installer via us as the distributor to Hoymiles, and the unit is replaced.
Technical assessment
Where the battery has its strengths, where it reaches its limits and what this means for your quote and installation.
For systems with up to eight modules where battery, inverter and MPP trackers are to be combined in one unit: balcony, carport, garden shed or small roof areas with up to four orientations. Plug-and-play with 800 W, expandable in steps of 4.02 kWh.
No location with direct sun or rain. Factory setting of 800 W on the grid side (unit certificate of the X: 800 VA), more only with the XM variant or a fixed connection according to the manufacturer. No backup power for the house grid, only the off-grid port. Hoymiles does not state a round-trip efficiency, and the expansion pack is not listed in the B2B shop.
In our assessment, the German special rule for plug-in solar devices no longer applies above 2 kW of module power; the fixed connection belongs in the hands of an installer, and the PV system and battery must be registered in the Marktstammdatenregister. Details and sources in the Legal situation section.
We clarify the expansion stage, module assignment and accessories before you order, obtain answers to open points from Hoymiles and handle warranty claims as the distributor. Requests are handled via our request form; single units and pallets can be ordered directly in the B2B shop.
