We earn commissions from qualifying purchases. This doesn't affect our rankings or reviews. How we review

Calculator

How much can your roof actually earn?

Drag the inputs to your reality. Numbers update live across the flow diagram, the per-channel ledger, and the 25-year cashflow.

Stack / yr: $850; From all paths

Feed-in only / yr: $126; Baseline comparator

Uplift: 574%; Stack vs feed-in only

Payback: 15.3y; Years (simple)

Inputs

Country preset

Annual surplus

Retail rate

Battery

Dynamic spread

BTC hashprice

$ per TH/day

Peak sun hours

System CapEx

Total install cost

Loading chart…

Estimates use a 5% discount rate, 3% electricity inflation, 0.5% panel degradation per year, and LFP batteries at 6,000 cycles to 80% SoH. €18k baseline CapEx unless you change the slider. Channels rescale proportionally when surplus changes. Not investment advice.

Calculator

How much can your roof actually earn?

Drag the inputs to your reality. Numbers update live across the flow diagram, the per-channel ledger, and the 25-year cashflow.

Stack / yr: $850; From all paths

Feed-in only / yr: $126; Baseline comparator

Uplift: 574%; Stack vs feed-in only

Payback: 15.3y; Years (simple)

Inputs

Country preset

Annual surplus

Retail rate

Battery

Dynamic spread

BTC hashprice

$ per TH/day

Peak sun hours

System CapEx

Total install cost

kWh flow per channel

kWh flow per channel: 4,200 kWh annual surplus distributed across the monetize stack
Channel	kWh / yr	€ / yr
Self-consumption	1,680	€168
Battery arbitrage	1,260	€227
BTC mining	884	€436
Thermal storage	252	€15
Feed-in tariff	124	€4
Total	4,200	€850

Self-consumption€168/yr
Battery arbitrage€227/yr
BTC mining€436/yr
Thermal storage€15/yr
Feed-in tariff€4/yr

Loading chart…

25-year cumulative cashflow

Monetize stack
Feed-in only
S&P 500 (7% CAGR)
Break-even year 20

25-year NPV (5% discount):$2,735

25-year cumulative cashflow
Year	Monetize stack	Feed-in only	S&P 500 (7% CAGR)
0	$-13,000	$-13,000	$0
1	$-12,171	$-12,877	$910
2	$-11,361	$-12,757	$1,884
3	$-10,572	$-12,640	$2,926
4	$-9,800	$-12,525	$4,040
5	$-9,048	$-12,414	$5,233
6	$-8,313	$-12,305	$6,509
7	$-7,596	$-12,199	$7,875
8	$-6,897	$-12,095	$9,336
9	$-6,214	$-11,993	$10,900
10	$-5,547	$-11,895	$12,573
11	$-4,896	$-11,798	$14,363
12	$-4,261	$-11,704	$16,278
13	$-3,641	$-11,612	$18,328
14	$-3,036	$-11,522	$20,521
15	$-2,446	$-11,435	$22,867
16	$-1,869	$-11,349	$25,378
17	$-1,307	$-11,266	$28,065
18	$-758	$-11,184	$30,939
19	$-222	$-11,105	$34,015
20	$301	$-11,027	$37,306
21	$812	$-10,951	$40,827
22	$1,310	$-10,878	$44,595
23	$1,797	$-10,805	$48,627
24	$2,272	$-10,735	$52,941
25	$2,735	$-10,666	$57,557

Loading chart…

Headline results

Inputs

Allocation + 25-year cashflow

Headline results

Inputs

Allocation + 25-year cashflow