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Accounting Academy

MODULE 1: Fundamentals

MODULE 2: Calculations

MODULE 3: Batch Partitioning & LCA

MODULE 4: Mass Balance with Ledgers

MODULE 5: Integration Testing

MODULE 6: Advanced Patterns & Production

Documentation Index

Fetch the complete documentation index at: https://docs.mangrovesystems.com/llms.txt

Use this file to discover all available pages before exploring further.

What you’ll learn in this lesson:
  • Understand the three categories of batch types: input, production, and output
  • Map each batch type to its corresponding ledger
  • Configure multiple batch types in Mangrove
  • See how batch types work together to create end-to-end traceability
In Module 3, you worked with a single batch type — typically a delivery batch that credited one ledger. Now that you’re tracking material across multiple stages with multiple ledgers, you need different batch types for each stage.

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The three batch type categories

Each stage in your process has its own batch type. These fall into three categories:
CategoryPurposeExample (Biochar)Example (RNG)
Input batchesRecord what comes into the systemFeedstock Receipt (dry tonnes of biomass received)Feedstock Intake (lbs of organic waste received)
Production batchesRecord what’s created through processingBiochar Produced (tonnes of biochar from pyrolysis)RNG Injected (MMBtu of gas injected into pipeline)
Output batchesRecord what leaves the system as final productCarbon Delivered (tCO2e of sequestered carbon)RNG Transmitted (MMBtu of gas delivered to end-user)
Not every project needs all three categories. A project with two ledgers might only need input and output batch types. The number of batch types should match the number of ledgers — each batch type feeds exactly one ledger.

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How batch types map to ledgers

Each batch type credits exactly one ledger. When a batch is created, it adds to that ledger’s balance. Material then flows to the next ledger through allocations. The key relationship: batch type → credits ledger → allocation → next ledger. This chain creates the mass balance tracking from input to output.

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Configuring multiple batch types in Mangrove

To set up multiple batch types, go to the Production Accounting section of your project and create a batch type for each stage. For each batch type, you’ll configure:
1

Name and description

Give the batch type a clear name that identifies the stage (e.g., “Feedstock Receipt”, “Biochar Produced”, “Carbon Delivered”).
2

Target ledger

Select which ledger this batch type credits. Each batch type feeds exactly one ledger.
3

Partition strategy

Choose how batches are created — per-event (each delivery = one batch), time-based (daily, monthly), or manual. This is the same partitioning you configured in Module 3.
4

Output datapoints

Define what each batch calculates. Input batches might track mass received; output batches might track tCO2e delivered.
5

Source event types

Link the batch type to the event types that provide its data. Feedstock Receipt batches pull from feedstock delivery events; Production batches pull from production run events.

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Example: Mangrove Biochar multi-stage batch types

Here’s what the three batch types look like for the Mangrove Biochar project:
Credits: Feedstock Inventory ledger (dry tonnes)
FieldValue
PartitionPer-delivery (each shipment = one batch)
Tracking IDSupplier delivery ticket number
Primary outputDry mass received (tonnes)
Source eventsFeedstock Delivery events
Each feedstock delivery creates a batch that adds to the Feedstock Inventory ledger.

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End-to-end traceability

With multiple batch types feeding multiple ledgers, you get full traceability from input to output: A verifier can trace any credit claim back through the chain: Report → Carbon Delivered batch → Biochar Produced batch → Feedstock Receipt batch → source event data. At every step, the ledger balances confirm that outputs don’t exceed inputs.

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Check your understanding

Each batch type credits exactly one ledger. This is a 1:1 relationship — a Feedstock Receipt batch type credits the Feedstock Inventory ledger, a Production batch type credits the Production ledger, and so on.
The chain is: batch type → credits ledger → allocation → next ledger. Each batch type creates batches that credit one ledger, and allocations move material between ledgers. A verifier can trace any output claim back through this chain to the original source events.
You’re now ready to put it all together. Head to the Module 4 Exercise: Design & Build Mass Balance with Ledgers to build a multi-ledger project in Mangrove.