Your park already owns the grid. Now make it pay twice.
The connection, the transformer, the land — you paid for them once. We add the battery, handle the DSO and the permit, and turn midday surplus into evening income. You keep your PV. We take the development risk.
A second income, not a second project
A battery beside your existing park uses what you already have — and we carry the work that makes it bankable.
More from the same export
Charge on midday surplus, discharge after 18:00 when prices peak. A 20 MWp park capped at 16 MW can carry a 10 MW / 20 MWh battery — without raising your permitted export.
We take the development
We screen your portfolio at our cost, run the DSO enquiry and the planning pre-check, and only proceed where the connection is real. If the grid says no, we stop — before you spend.
You choose how you earn
Your PV stays yours, separately metered. The battery can pay you as rent, a share of revenue, or joint-venture equity — whichever fits your portfolio.
Three ways your midday sun becomes evening income
One battery, stacked uses. The optimizer shifts between them — you don't have to lock it to a single market.
Shift the price peak
Sell the same solar kilowatt-hour later. Midday when prices dip, the battery charges; after 18:00, it discharges into higher prices.
Keep the grid balanced
Short, flexible reserve blocks sit on top of shifting — not instead of it. FCR needs only 30 minutes of energy; aFRR runs in 4-hour slots you can opt in and out of.
Rescue what was curtailed
Energy you once spilled or sold near zero now charges the battery — especially on negative-price days.
Your site already has what a greenfield must buy
That is why a retrofit can move faster and cheaper than a new battery elsewhere.
- Grid connection & transformer — the scarce asset, already built
- Land, access, fencing, comms — in place and permitted
- DSO relationship — an established contact, not a cold call
- §35(1) Nr. 11 BauGB — battery beside your PV is privileged; usually no new zoning plan
A clear path. We fund the risky part.
You share your portfolio. We do the checks at our cost and only ask for exclusivity once the numbers look real.
Free portfolio check
Send us your park list. In a few days we return the 2–3 best candidates for a battery — no cost, no commitment.
Site & grid check
With your exclusivity on those sites, we run the DSO enquiry and planning pre-check. Our spend, our risk.
Permit & connection
Building permit and fire/noise concepts only as triggered. We manage the DSO agreement on import, export and control.
Build & earn
Financed EPC, optimizer tender, separately metered. You choose rent, revenue share or JV — and you see the dispatch.
Is your park retrofit-ready?
Eight pages, no sales deck. What the DSO actually checks, what §35(1) Nr. 11 means for your permit, and how a 20 MWp example pencils out — so you can judge for yourself.
- 01Grid access — why the connection point is the value
- 02Permitting — the privileged path beside your PV
- 03Revenue — shifting, FCR, aFRR stacked
- 04Checklist — spare land, export, DSO, age
Send us your park list. We'll do the rest.
Share the basics — location, size, grid level. We reply within two working days with what we'd check next.
Location + MWp per park + commissioning year + DSO if known + export limit if known + spare area. Even a partial list is enough.
Prefer email?
hello@voltenberg.comWhat happens next
We screen at our cost and come back with the 2–3 most promising sites. Only then do we discuss exclusivity.