{"id":14710,"date":"2025-10-13T23:37:42","date_gmt":"2025-10-13T21:37:42","guid":{"rendered":"https:\/\/fotovol.com\/renewable-energy\/physical-vs-virtual-batteries-in-industry-which-one-is-best-and-when\/"},"modified":"2026-05-25T14:53:53","modified_gmt":"2026-05-25T12:53:53","slug":"physical-vs-virtual-batteries-in-industry-which-one-is-best-and-when","status":"publish","type":"post","link":"https:\/\/fotovol.com\/en\/renewable-energy\/physical-vs-virtual-batteries-in-industry-which-one-is-best-and-when\/","title":{"rendered":"Physical vs. virtual batteries in industry: which one is best and when"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\" id=\"basic-concepts-without-jargon\">Basic concepts without jargon<\/h2>\n\n<ul class=\"wp-block-list\">\n<li><strong>Physical battery (hardware):<\/strong> storage equipment -usually lithium-ion- that accumulates <strong>kilowatt-hours (kWh)<\/strong> for later use. It is used for <g id=\"gid_2\">time-shifting<\/g> (moving kWh from midday to afternoon\/evening) and <g id=\"gid_3\">peak-shaving<\/g> (cutting demand peaks and lowering contracted power). Typical cycle efficiency: <strong>90-96%<\/strong>.  <\/li>\n\n\n\n<li><strong>Virtual battery (service):<\/strong> your supplier converts the <strong>surpluses<\/strong> you feed into the grid into a <strong>balance in euros (\u20ac)<\/strong> that discounts future bills (sometimes from other supplies in the group). It does not provide energy in the event of a grid outage. <\/li>\n<\/ul>\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>The idea that rules: <strong>physical<\/strong> battery <strong>= kWh storage =<\/strong> <strong>virtual<\/strong> battery <strong>= \u20ac storage.<\/strong><\/p>\n<\/blockquote>\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Need a recommendation for your case? Consult our <strong>\n  <a href=\"https:\/\/fotovol.com\/en\/our-services\/batteries-for-photovoltaic-installations\/\">battery service for photovoltaic installations<\/a>\n<\/strong>. <\/p>\n<\/blockquote>\n\n<h2 class=\"wp-block-heading\" id=\"in-which-scenarios-each-option-wins\">In which scenarios each option wins<\/h2>\n\n<h3 class=\"wp-block-heading\" id=\"when-the-physical-battery-usually-wins\">When the physical battery usually wins<\/h3>\n\n<ul class=\"wp-block-list\">\n<li><strong>expensive power peaks<\/strong> or penalties for exceeding the contracted power: <strong>peak-shaving<\/strong> cuts these peaks.<\/li>\n\n\n\n<li>relevant <strong>evening\/night consumption<\/strong> with surplus at noon.<\/li>\n\n\n\n<li><strong>continuity of service<\/strong>: processes sensitive to micro outages; possibility of <strong>backup<\/strong> with the storage system.<\/li>\n\n\n\n<li><strong>low surplus compensation<\/strong>: big difference between what you pay per kWh and what you get paid for dumping (high spread).<\/li>\n<\/ul>\n\n<h3 class=\"wp-block-heading\" id=\"when-the-virtual-battery-usually-wins\">When the virtual battery usually wins<\/h3>\n\n<ul class=\"wp-block-list\">\n<li><strong>zero capex<\/strong> or limited budget: you want to save money <strong>now<\/strong> without any work or space.<\/li>\n\n\n\n<li>stable <strong>daytime consumption<\/strong>, with no relevant peaks.<\/li>\n\n\n\n<li><strong>multiple sites (CUPS)<\/strong>: the balance may be applied to other supplies (subject to conditions).<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\" id=\"physical-vs-virtual-investment-efficiency-and-risk\">Physical vs. virtual: investment, efficiency and risk<\/h2>\n\n<p>Although both reduce bills, they work with opposite logics.<br\/>The <strong>physical<\/strong> one requires <strong>investment<\/strong> (equipment + integration), but gives you <strong>operational control<\/strong> (kW and kWh) and can reduce the <strong>contracted power<\/strong>. The <strong>virtual<\/strong> one does not require investment or maintenance; its result depends on the <strong>compensation price<\/strong> and the <strong>letter of the contract<\/strong>. <\/p>\n\n<h3 class=\"wp-block-heading\" id=\"quick-comparison-table\">Quick comparison table<\/h3>\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>criteria<\/th><th>physical battery<\/th><th>virtual drum kit<\/th><\/tr><\/thead><tbody><tr><td>initial investment<\/td><td>high (\u20ac\/kWh, \u20ac\/kW)<\/td><td>null<\/td><\/tr><tr><td>maintenance\/space<\/td><td>yes<\/td><td>no<\/td><\/tr><tr><td>efficiency\/value<\/td><td>90-96% round-trip<\/td><td>clearing price (usually &lt; purchase price)<\/td><\/tr><tr><td>network outages<\/td><td>yes (backup)<\/td><td>no<\/td><\/tr><tr><td>power reduction<\/td><td>yes (peak-shaving)<\/td><td>no<\/td><\/tr><tr><td>deployment speed<\/td><td>work and permits<\/td><td>immediate<\/td><\/tr><tr><td>main risk<\/td><td>degradation\/warranties<\/td><td>contract conditions\/prices<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<h2 class=\"wp-block-heading\" id=\"how-to-decide-in-3-steps-with-the-load-curve-as-arbiter\">How to decide in 3 steps (with the load curve as arbiter)<\/h2>\n\n<ol class=\"wp-block-list\">\n<li><strong>Analyze your &#8220;when<\/strong>&#8220;<br\/>Use 12 months of hourly consumption (or 15 min). Segment by rate periods and shifts. Calculate <strong>95-99<\/strong> percentiles of demand to locate peaks.  <\/li>\n\n\n\n<li><strong>Models savings<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>physics:<\/strong> kWh shifted to expensive hours + power reduction &#8211; losses &#8211; OPEX \u2192 calculate <strong>NPV<\/strong> and <strong>IRR<\/strong> with lifetime and degradation.<\/li>\n\n\n\n<li><strong>virtual:<\/strong> surplus \u00d7 compensation price &#8211; costs\/service limits.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Rule of thumb<\/strong><br\/>If the <strong>spread<\/strong> (buy &#8211; offset) is <strong>high<\/strong> or there are overnight <strong>peaks\/demand<\/strong> \u2192 <strong>physics<\/strong> usually wins in the long run in <strong>NPV<\/strong>.<br\/>If there are no peaks, consumption is daytime and <strong>CAPEX<\/strong> is brake \u2192 start with <strong>virtual<\/strong>.<\/li>\n<\/ol>\n\n<h2 class=\"wp-block-heading\" id=\"simple-numerical-example-to-see-magnitudes\">Simple numerical example (to see magnitudes)<\/h2>\n\n<ul class=\"wp-block-list\">\n<li>PV 600 kWp \u2192 ~960<strong>MWh\/year<\/strong>. Probable surplus: <strong>25%<\/strong> \u2192 240 MWh. <\/li>\n\n\n\n<li>Average purchase: <strong>0.12 \u20ac\/kWh<\/strong> | Compensation: <strong>0.06 \u20ac\/kWh<\/strong>.<\/li>\n<\/ul>\n\n<p><strong>virtual only<\/strong> \u2192 240,000 kWh \u00d7 0.06 \u20ac = <strong>14,400 \u20ac\/year<\/strong>.<\/p>\n\n<p><strong>physical<\/strong> (500 kWh \/ 250 kW, 300 cycles\/year, 92%):<br\/>useful kWh\/year \u2248 500\u00d7300\u00d70.92 = <strong>138 MWh<\/strong>.<br\/>Displacement value (from 0.06 to 0.12 \u20ac) = <strong>8.280 \u20ac\/year<\/strong><br\/> +<strong> peak-shaving<\/strong> (-150 kW in P1\/P2): <strong>8-15 k\u20ac\/year<\/strong> depending on prices.<br\/>Estimated total: <strong>16-23 k\u20ac\/year<\/strong> (minus OPEX).<br\/><strong>moral:<\/strong> <strong>peak-shaving<\/strong> can tip the balance towards <strong>physics<\/strong>.<\/p>\n\n<h2 class=\"wp-block-heading\" id=\"physical-battery-technologies-what-really-matters\">Physical battery technologies (what really matters)<\/h2>\n\n<ul class=\"wp-block-list\">\n<li><strong>lithium-ion (LFP\/NMC):<\/strong> industry standard; good cycling and density; critical BMS and controlled thermal environment.<\/li>\n\n\n\n<li><strong>lead-acid (AGM\/gel):<\/strong> low cost, low density; today residual in industry.<\/li>\n\n\n\n<li><strong>flux (vanadium&#8230;):<\/strong> large scale and long life; high space and CAPEX.<\/li>\n<\/ul>\n\n<p>More than chemistry, the <strong>use case<\/strong> decides: power (kW), energy (kWh), cycles\/year, depth of discharge and room (safety, ventilation, regulations).<\/p>\n\n<h2 class=\"wp-block-heading\" id=\"risks-and-fine-print\">Risks and fine print<\/h2>\n\n<ul class=\"wp-block-list\">\n<li><strong>virtual:<\/strong> does it compensate 100%? does it balance? does it apply to other CUPS? does it apply to other CUPS? monthly cap? <strong>Contractual\/regulatory<\/strong> risk.    <\/li>\n\n\n\n<li><strong>physical:<\/strong> <strong>annual degradation<\/strong>, warranties per year or throughput, installation requirements (fire protection, ventilation), <strong>integration with inverter and SCADA<\/strong>.<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\" id=\"hybrid-strategy-often-the-winning-option\">Hybrid strategy (often the winning option)<\/h2>\n\n<p>Sizes the <strong>physical battery<\/strong> to cover the peaks and the profitable evening stretch (paying cycles). The <strong>residual surpluses<\/strong> that remain, <strong>to virtual battery<\/strong>.<br\/>Result: more <strong>useful self-consumption<\/strong>, <strong>less contracted power<\/strong> and <strong>0 kWh wasted<\/strong>. <\/p>\n\n<h2 class=\"wp-block-heading\" id=\"checklist-to-close-the-decision\">Checklist to close the decision<\/h2>\n\n<ul class=\"wp-block-list\">\n<li>load curve 12 months segmented by periods\/shifts<\/li>\n\n\n\n<li>validated hourly PV profile per kWp (PR and losses)<\/li>\n\n\n\n<li>estimation of surpluses and coincident peaks<\/li>\n\n\n\n<li>NPV\/IRR of <strong>physics<\/strong> (kWh displaced + power)<\/li>\n\n\n\n<li><strong>virtual<\/strong> conditions (compensation, limits, expiration, multi-CUPS)<\/li>\n\n\n\n<li>space\/work\/security (if physical)<\/li>\n\n\n\n<li>decision: <strong>physical \/ virtual \/ hybrid<\/strong> with KPI and target payback<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\" id=\"frequently-asked-questions-about-different-types-of-batteries\">Frequently asked questions about different types of batteries<\/h2>\n<div id=\"rank-math-faq\" class=\"rank-math-block\">\n<div class=\"rank-math-list \">\n<div id=\"faq-question-1760390962938\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \" id=\"can-i-combine-physical-and-virtual-batteries\">Can I combine physical and virtual batteries?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>Yes. Physical covers peaks and afternoon\/evening; virtual monetizes the rest. <\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1760390991289\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \" id=\"is-the-virtual-battery-useful-in-a-power-outage\">Is the virtual battery useful in a power outage?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>No. It offers balance on bill, not energy. <\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1760391037249\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \" id=\"what-size-of-physical-battery-do-i-choose\">What size of physical battery do I choose?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>Part of your <strong>peaks<\/strong> and <strong>evening stretch<\/strong>. sweep kW\/kWh and choose the <strong>maximum NPV<\/strong>, not the maximum kWh. <\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1760391059801\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \" id=\"when-does-virtual-compete-well\">When does virtual compete well?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>When the <strong>compensation<\/strong> is close to your <strong>purchase price<\/strong> and you have no peaks or significant overnight consumption.<\/p>\n\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>Do you want us to do a physical vs. virtual study with your real curve and tell you which option gives more NPV and how much you can lower the contracted power? Ask us for the analysis and we will send you back a recommendation, figures and technical report ready for decision. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>The physical battery stores kWh in a computer and allows you to move energy to evening\/night and cut power peaks (backup included). The virtual battery saves \u20ac: monetize your surplus on the bill without installing anything. The choice depends on your load curve, peaks and budget; in many cases, the hybrid strategy (physical + virtual) maximizes savings.  <\/p>\n","protected":false},"author":2,"featured_media":14696,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[104],"tags":[],"class_list":["post-14710","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-renewable-energy"],"acf":[],"_links":{"self":[{"href":"https:\/\/fotovol.com\/en\/wp-json\/wp\/v2\/posts\/14710","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fotovol.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fotovol.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fotovol.com\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/fotovol.com\/en\/wp-json\/wp\/v2\/comments?post=14710"}],"version-history":[{"count":2,"href":"https:\/\/fotovol.com\/en\/wp-json\/wp\/v2\/posts\/14710\/revisions"}],"predecessor-version":[{"id":19527,"href":"https:\/\/fotovol.com\/en\/wp-json\/wp\/v2\/posts\/14710\/revisions\/19527"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/fotovol.com\/en\/wp-json\/wp\/v2\/media\/14696"}],"wp:attachment":[{"href":"https:\/\/fotovol.com\/en\/wp-json\/wp\/v2\/media?parent=14710"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fotovol.com\/en\/wp-json\/wp\/v2\/categories?post=14710"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fotovol.com\/en\/wp-json\/wp\/v2\/tags?post=14710"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}