{"id":16563,"date":"2026-11-08T17:16:46","date_gmt":"2026-11-08T16:16:46","guid":{"rendered":"https:\/\/pvprosolar.de\/?p=16563"},"modified":"2026-11-08T17:16:46","modified_gmt":"2026-11-08T16:16:46","slug":"meter-cabinet-pv-system","status":"publish","type":"post","link":"https:\/\/pvprosolar.de\/en\/meter-cabinet-pv-system\/","title":{"rendered":"Meter Cabinet for a PV System: When an Upgrade Is Needed and What It Costs"},"content":{"rendered":"<p>The meter cabinet for a solar PV system is one of the items our customers ask about most, because many quotes only add it later as an extra. Whether your existing cabinet can stay is decided by the technical connection conditions (TAB) of your grid operator. If it has to be upgraded or replaced by a new TAB-compliant meter cabinet, this usually costs <strong>\u20ac1,200\u20132,500<\/strong> with us, and up to <strong>\u20ac3,500<\/strong> for extensive work. If the work is part of the PV system, it is usually also charged at 0 % VAT.<\/p>\n<p>At PVPro Solar, our own electricians check the meter cabinet during the on-site visit. Any necessary upgrade is included in the fixed price from the start and is done together with the PV installation. <a href=\"https:\/\/pvprosolar.de\/en\/free-photovoltaic-quote\/\">Request your free, no-obligation quote now<\/a><\/p>\n<h2>Meter cabinet for a PV system: key facts at a glance<\/h2>\n<table>\n<thead>\n<tr>\n<th>Question<\/th>\n<th>Short answer<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Does the meter cabinet always need replacing?<\/td>\n<td>No. Whether it may stay depends on its design, condition and your grid operator&#8217;s TAB.<\/td>\n<\/tr>\n<tr>\n<td>What does an upgrade or new cabinet cost?<\/td>\n<td>With us usually \u20ac1,200\u20132,500, up to \u20ac3,500 for extensive work, depending on the scope<\/td>\n<\/tr>\n<tr>\n<td>Which rules apply?<\/td>\n<td>The grid operator&#8217;s TAB and the application rule VDE-AR-N 4100 (current edition 2026-04)<\/td>\n<\/tr>\n<tr>\n<td>VAT?<\/td>\n<td>0 % if the work is needed for the qualifying PV system (Section 12 (3) UStG, section 12.18 UStAE)<\/td>\n<\/tr>\n<tr>\n<td>Who may do the work?<\/td>\n<td>Only an installation company registered in a grid operator&#8217;s installer register (Section 13 NAV)<\/td>\n<\/tr>\n<tr>\n<td>Heat pump and wallbox?<\/td>\n<td>Plan them in now: space for a control unit under Section 14a EnWG and, if needed, a second meter slot<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>What a meter cabinet for a PV system has to provide<\/h2>\n<p>With a PV system, your house connection becomes a two-way connection: electricity no longer only flows into the house, it also flows back into the grid. The meter cabinet therefore needs more than a free spot for a new meter. The technical minimum requirements are set out in VDE-AR-N 4100, the application rule for connections to the low-voltage grid. Its revised 2026-04 edition covers, among other things, the integration of controllable consumer devices (<a href=\"https:\/\/www.vde.com\/de\/fnn\/themen\/tar-niederspannung\" target=\"_blank\" rel=\"noopener\">VDE FNN, TAR low voltage<\/a>). The specific requirements for your home are in your grid operator&#8217;s TAB.<\/p>\n<h3>What needs space in the meter cabinet for a PV system<\/h3>\n<ul>\n<li><strong>A meter slot for the bidirectional meter<\/strong> or smart metering system (iMSys). The metering point operator supplies the meter itself.<\/li>\n<li><strong>Space for the smart meter gateway<\/strong> and the communication connection at the meter slot (APZ). Mandatory installation cases for a smart metering system include systems above 7 kW of installed capacity, annual consumption above 6,000 kWh and an agreement under Section 14a EnWG (<a href=\"https:\/\/www.gesetze-im-internet.de\/messbg\/__29.html\" target=\"_blank\" rel=\"noopener\">Section 29 MsbG<\/a>).<\/li>\n<li><strong>Selective main circuit protection and surge protection<\/strong>, where the TAB and standards require them for the modified installation.<\/li>\n<li><strong>Protection for inverter and battery<\/strong> with clean cable routing.<\/li>\n<li><strong>Reserve for a wallbox and heat pump<\/strong>, so you don&#8217;t have to rebuild a second time.<\/li>\n<\/ul>\n<p>Without a smart metering system and control unit, new systems receiving a feed-in tariff may feed in at most 60 % of their installed capacity (<a href=\"https:\/\/www.gesetze-im-internet.de\/eeg_2014\/__9.html\" target=\"_blank\" rel=\"noopener\">Section 9 (2) EEG<\/a>). A prepared meter slot therefore also makes financial sense.<\/p>\n<h2>Grandfathering: when the old meter cabinet may stay<\/h2>\n<p>An existing meter cabinet is generally grandfathered (Bestandsschutz) as long as it is safe and nothing is changed in the customer installation. Adding a PV system, a battery, a heat pump or a wallbox does change the installation, and this is registered with the grid operator. Changes and extensions must follow the generally recognised rules of technology (<a href=\"https:\/\/www.gesetze-im-internet.de\/nav\/__13.html\" target=\"_blank\" rel=\"noopener\">Section 13 NAV<\/a>). Whether the existing meter slot may still be used is set out in the TAB, depending on the design and age of the meter slot.<\/p>\n<p>The basis is the nationwide BDEW model text TAB 2023. Many grid operators in northern Germany use the regional version TAB NS Nord 2023 and publish their own supplements, for example BS|NETZ in Braunschweig. In the Hannover region, enercity Netz or Avacon Netz is responsible depending on your address. We check which version applies to you before we quote.<\/p>\n<h3>Typical signs that an upgrade is needed<\/h3>\n<ul>\n<li>no free meter slot or no reserve for additional devices<\/li>\n<li>old screw-in fuses instead of circuit breakers, no residual current protection<\/li>\n<li>an older type of meter slot that the TAB no longer allow when the installation changes<\/li>\n<li>no space for a smart meter gateway and control unit<\/li>\n<li>visible damage, heat marks or brittle cables<\/li>\n<\/ul>\n<p>This list does not replace an inspection. A photo of your opened meter cabinet (just open the door, don&#8217;t remove any covers) is enough for a first assessment.<\/p>\n<h2>What does the meter cabinet for a PV system cost?<\/h2>\n<p>The price depends on whether the existing cabinet can be upgraded or a new TAB-compliant meter cabinet is needed, and how much work is required around it.<\/p>\n<h3>Replacing the meter cabinet: costs at PVPro Solar<\/h3>\n<table>\n<thead>\n<tr>\n<th>Scope<\/th>\n<th>Our cost<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Upgrade or new TAB-compliant meter cabinet, usual scope<\/td>\n<td>usually \u20ac1,200\u20132,500<\/td>\n<\/tr>\n<tr>\n<td>Extensive work<\/td>\n<td>up to \u20ac3,500<\/td>\n<\/tr>\n<tr>\n<td>Meter or smart metering system<\/td>\n<td>not included, supplied by the metering point operator<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>What drives the price<\/h3>\n<p>It gets more expensive if several meter slots are needed, for example for a separately billed heat pump or wallbox meter, if the cabinet has to move to another location, if main cables are undersized or if sub-distribution boards have to be rebuilt. A simple swap in the same place with intact wiring tends to sit at the lower end. You can find the full cost picture of a PV system on our page on <a href=\"https:\/\/pvprosolar.de\/en\/solar-panel-costs\/\">solar panel costs<\/a>.<\/p>\n<h3>What is not included in the meter cabinet price<\/h3>\n<p>The meter itself is installed by the metering point operator or the grid operator. It remains their property, and the annual charges for metering are capped by law. These costs therefore don&#8217;t come from us; they appear on your electricity bill or the metering point operator&#8217;s invoice.<\/p>\n<p>With us, a necessary upgrade is a separate item in the fixed price, not an extra after installation. We explain how we build our quotes on the page <a href=\"https:\/\/pvprosolar.de\/en\/free-photovoltaic-quote\/\">free photovoltaic quote<\/a>. <a href=\"https:\/\/pvprosolar.de\/en\/free-photovoltaic-quote\/\">Request your free, no-obligation quote now<\/a><\/p>\n<h2>0 % VAT: when the meter cabinet counts as part of the PV system<\/h2>\n<p>Since 1 January 2023, the supply and installation of PV systems and batteries on or near residential buildings has been subject to a zero VAT rate (<a href=\"https:\/\/www.gesetze-im-internet.de\/ustg_1980\/__12.html\" target=\"_blank\" rel=\"noopener\">Section 12 (3) UStG<\/a>). In the VAT Application Decree, section 12.18 UStAE, the tax authorities clarified with the BMF letter of 30 November 2023 how meter cabinets are treated:<\/p>\n<ul>\n<li>The <strong>renewal or upgrading of a meter cabinet<\/strong> is an ancillary service to the qualifying supply of the PV system and is then also charged at 0 % (section 12.18 (1) UStAE).<\/li>\n<li>Even a <strong>separately ordered<\/strong> extension or renewal of the meter cabinet is zero-rated if it is needed for the PV system (section 12.18 (8) UStAE).<\/li>\n<li><strong>19 %<\/strong> applies if the renewal is not caused by installing the PV system (section 12.18 (10), example 2). Consumers such as a wallbox or heat pump are not essential components of the PV system (section 12.18 (9)).<\/li>\n<\/ul>\n<p>If the meter cabinet is renewed for the PV system and also prepared for a wallbox or heat pump, we list the items separately in the quote. How they are split in your individual case is best clarified with your tax adviser. Read more about the zero rate in our article on <a href=\"https:\/\/pvprosolar.de\/en\/photovoltaic-system-vat\/\">photovoltaic system VAT<\/a>.<\/p>\n<h2>Heat pump and wallbox: plan the meter cabinet for them now<\/h2>\n<p>Anyone building a PV system today is often already planning a wallbox or heat pump. Above 4.2 kW, both count as controllable consumer devices under <a href=\"https:\/\/www.gesetze-im-internet.de\/enwg_2005\/__14a.html\" target=\"_blank\" rel=\"noopener\">Section 14a EnWG<\/a>. Since 1 January 2024, new devices of this kind must be controllable. In case of grid bottlenecks, the grid operator may reduce their draw to as little as 4.2 kW; this minimum power always remains available. In return, you get reduced grid charges (<a href=\"https:\/\/www.bundesnetzagentur.de\/DE\/Vportal\/Energie\/SteuerbareVBE\/start.html\" target=\"_blank\" rel=\"noopener\">Bundesnetzagentur<\/a>).<\/p>\n<h3>Section 14a EnWG: control unit and second meter slot<\/h3>\n<p>For control, the meter cabinet needs space for a control unit connected to the smart metering system. If you choose module 2 (reduced energy price) for the grid charge, the Bundesnetzagentur requires a separate meter for the controllable device, which means an additional meter slot. With module 1 (flat-rate reduction), the shared meter is sufficient. This decision should be made before the upgrade, because adding a meter slot later almost always costs more than installing it right away.<\/p>\n<p>How a PV system and heat pump work together is explained in our article on <a href=\"https:\/\/pvprosolar.de\/en\/pv-system-heat-pump-hannover\/\">combining a heat pump with photovoltaics<\/a>. For the charging point, read <a href=\"https:\/\/pvprosolar.de\/en\/home-wallbox-installation\/\">home wallbox installation<\/a>, and the interaction of all three devices is covered in <a href=\"https:\/\/pvprosolar.de\/en\/photovoltaics-with-heat-pumps-and-wallboxes\/\">photovoltaics with heat pumps and wallboxes<\/a>. Adding a battery to an existing system? The meter cabinet often needs adjusting then as well, see <a href=\"https:\/\/pvprosolar.de\/en\/retrofitting-a-solar-battery\/\">retrofitting a solar battery<\/a>. In a new build, you plan the meter cabinet correctly from the start, see <a href=\"https:\/\/pvprosolar.de\/en\/solar-panels-new-build\/\">solar panels on a new build<\/a>.<\/p>\n<h2>Meter cabinet and PV system from one source: how we do it<\/h2>\n<h3>Our own electricians, registered with the grid operator<\/h3>\n<p>Apart from the grid operator, only an installation company registered in a grid operator&#8217;s installer register may work on the installation behind the house connection (Section 13 NAV). With us, this is done by our own certified electricians, not by changing subcontractors. They upgrade the meter cabinet in the same job as the inverter, battery and system connection, in line with VDE and TAB. You have one contact for the roof, the electrics and the registration.<\/p>\n<h3>A fixed price instead of extras<\/h3>\n<p>We clarify the condition of your meter cabinet before quoting, by photo and during the on-site visit. Any necessary upgrade is then included in the written fixed price. Payment follows our 30\/70 model: 30 % on order, 70 % after installation. We install inverters from Fronius, batteries from BYD, modules from AIKO, JA Solar or Longi and mounting systems from K2 Systems.<\/p>\n<h2>Process: from a photo to a finished PV system with a new meter cabinet<\/h2>\n<ol>\n<li><strong>Photo and initial advice:<\/strong> you send us a photo of your meter cabinet, and we give you a first assessment.<\/li>\n<li><strong>On-site visit:<\/strong> our electricians check the meter slot, the main cable, space and reserve for a wallbox or heat pump.<\/li>\n<li><strong>Fixed-price quote:<\/strong> meter cabinet, PV system and, if applicable, battery are listed separately in the quote.<\/li>\n<li><strong>Registration:<\/strong> we register the system with the grid operator and in the Marktstammdatenregister (MaStR).<\/li>\n<li><strong>Upgrade, installation and commissioning:<\/strong> we build the meter cabinet and the system together. The metering point operator installs the meter.<\/li>\n<\/ol>\n<h2>Funding for the meter cabinet<\/h2>\n<p>There is no separate federal funding just for the meter cabinet. In the Hannover region, the Dach-Solar programme also funds electrics and the house connection together with a new PV system on an existing building, with up to \u20ac1,000 for residential buildings. You must apply before placing the order, and funding is only available while funds last. We check during the consultation whether the programme is still open for you.<\/p>\n<h2>Frequently asked questions about the meter cabinet<\/h2>\n        <section class=\"sc_fs_faq sc_card \">\n            <div>\n\t\t\t\t<h3>Do I need a new meter cabinet for every PV system?<\/h3>                <div>\n\t\t\t\t\t                    <p>\n\t\t\t\t\t\tNo. Whether the existing meter cabinet may stay depends on its design, condition and your grid operator's TAB. An upgrade is often enough; older meter slots need a new cabinet. We check this before quoting.                    <\/p>\n                <\/div>\n            <\/div>\n        <\/section>\n\t\t        <section class=\"sc_fs_faq sc_card \">\n            <div>\n\t\t\t\t<h3>What does a new meter cabinet for a PV system cost?<\/h3>                <div>\n\t\t\t\t\t                    <p>\n\t\t\t\t\t\tAt PVPro Solar, upgrading or installing a new TAB-compliant meter cabinet usually costs \u20ac1,200\u20132,500, and up to \u20ac3,500 for extensive work. The price depends on the scope, for example additional meter slots, a change of location or new main cables.                    <\/p>\n                <\/div>\n            <\/div>\n        <\/section>\n\t\t        <section class=\"sc_fs_faq sc_card \">\n            <div>\n\t\t\t\t<h3>Does 0 % VAT apply to the meter cabinet?<\/h3>                <div>\n\t\t\t\t\t                    <p>\n\t\t\t\t\t\tYes, if the renewal or upgrade is needed for the qualifying PV system. Under section 12.18 UStAE it counts as an ancillary service, even when ordered separately. If the upgrade is not caused by the PV system, for example only for a wallbox, 19 % VAT applies.                    <\/p>\n                <\/div>\n            <\/div>\n        <\/section>\n\t\t        <section class=\"sc_fs_faq sc_card \">\n            <div>\n\t\t\t\t<h3>May I upgrade the meter cabinet myself?<\/h3>                <div>\n\t\t\t\t\t                    <p>\n\t\t\t\t\t\tNo. Under Section 13 NAV, apart from the grid operator, only installation companies registered in a grid operator's installer register may work on the installation behind the house connection.                    <\/p>\n                <\/div>\n            <\/div>\n        <\/section>\n\t\t        <section class=\"sc_fs_faq sc_card \">\n            <div>\n\t\t\t\t<h3>Who pays for the new meter?<\/h3>                <div>\n\t\t\t\t\t                    <p>\n\t\t\t\t\t\tThe meter or smart metering system is installed by the metering point operator and remains their property. You pay an annual charge for it, which is capped by law. The meter is not included in the price of the meter cabinet.                    <\/p>\n                <\/div>\n            <\/div>\n        <\/section>\n\t\t        <section class=\"sc_fs_faq sc_card \">\n            <div>\n\t\t\t\t<h3>Do I need a second meter slot for a heat pump or wallbox?<\/h3>                <div>\n\t\t\t\t\t                    <p>\n\t\t\t\t\t\tOnly if you choose module 2 of the reduced grid charge under Section 14a EnWG does the device need a separate meter. With module 1, the shared meter is enough. You need space for the control unit in both cases.                    <\/p>\n                <\/div>\n            <\/div>\n        <\/section>\n\t\t        <section class=\"sc_fs_faq sc_card \">\n            <div>\n\t\t\t\t<h3>Is there funding for the meter cabinet?<\/h3>                <div>\n\t\t\t\t\t                    <p>\n\t\t\t\t\t\tThere is no separate federal funding. The Hannover region's Dach-Solar programme also funds electrics and the house connection with up to \u20ac1,000 for residential buildings, together with a new PV system on an existing building, while funds last and if you apply before placing the order.                    <\/p>\n                <\/div>\n            <\/div>\n        <\/section>\n\t\t\n<script type=\"application\/ld+json\">\n    {\n\t\t\"@context\": \"https:\/\/schema.org\",\n\t\t\"@type\": \"FAQPage\",\n\t\t\"mainEntity\": [\n\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"Do I need a new meter cabinet for every PV system?\",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"No. Whether the existing meter cabinet may stay depends on its design, condition and your grid operator's TAB. An upgrade is often enough; older meter slots need a new cabinet. We check this before quoting.\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t,\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"What does a new meter cabinet for a PV system cost?\",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"At PVPro Solar, upgrading or installing a new TAB-compliant meter cabinet usually costs \u20ac1,200\u20132,500, and up to \u20ac3,500 for extensive work. The price depends on the scope, for example additional meter slots, a change of location or new main cables.\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t,\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"Does 0 % VAT apply to the meter cabinet?\",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"Yes, if the renewal or upgrade is needed for the qualifying PV system. Under section 12.18 UStAE it counts as an ancillary service, even when ordered separately. 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The meter is not included in the price of the meter cabinet.\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t,\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"Do I need a second meter slot for a heat pump or wallbox?\",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"Only if you choose module 2 of the reduced grid charge under Section 14a EnWG does the device need a separate meter. With module 1, the shared meter is enough. You need space for the control unit in both cases.\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t,\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"Is there funding for the meter cabinet?\",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"There is no separate federal funding. The Hannover region's Dach-Solar programme also funds electrics and the house connection with up to \u20ac1,000 for residential buildings, together with a new PV system on an existing building, while funds last and if you apply before placing the order.\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t\t    ]\n}\n<\/script>\n\n<h2>Have your meter cabinet checked and secure a fixed price<\/h2>\n<p>Send us a photo of your meter cabinet with your enquiry. We&#8217;ll tell you whether it can stay and give you the fixed price for the PV system and the upgrade in one quote. <a href=\"https:\/\/pvprosolar.de\/en\/free-photovoltaic-quote\/\">Request your free, no-obligation quote now<\/a>, call us on <a href=\"tel:+495113360603\">0511 3360603<\/a> or message us on <a href=\"https:\/\/wa.me\/4917623998536\" target=\"_blank\" rel=\"noopener\">WhatsApp at +49 176 2399 8536<\/a>.<\/p>\n<p><em>Note: This article gives a general overview (as of November 2026) and does not replace tax or legal advice.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The meter cabinet for a solar PV system is one of the&#8230;<\/p>\n","protected":false},"author":18,"featured_media":16675,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","postBodyCss":"","postBodyMargin":[],"postBodyPadding":[],"postBodyBackground":{"backgroundType":"classic","gradient":""},"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"_kad_post_transparent":"default","_kad_post_title":"default","_kad_post_layout":"default","_kad_post_sidebar_id":"","_kad_post_content_style":"default","_kad_post_vertical_padding":"default","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[489,490],"tags":[],"class_list":["post-16563","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-costs-funding","category-products-technology"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Meter Cabinet for a PV System: Costs &amp; Rules | PVPro Solar<\/title>\n<meta name=\"description\" content=\"Meter cabinet for a PV system: when a TAB upgrade is needed, what it costs (usually \u20ac1,200\u20132,500) and when 0 % VAT applies. 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